FR-LEX20L Keyence

Specifications

Model

FR-LEX20L

Type

2-wire explosion-proof model

Measuring range

Up to 15 m 49.2'*1

Display range

Up to 25 m 82.0'*1

Measurable dielectric constant of medium

2 or more *2

Resolution

1 mm 0.04"

Precision

Up to 0.1 m 0.3': ±10 mm 0.39";
0.1 to 10 m 0.3' to 32.8' : ±1 mm 0.04";
10 to 20 m 32.8' to 65.6': ±2 mm 0.08"
*3

Response time

1 s, 4 s (default value), 10 s, 25 s

Tank pressure

-0.1 to +1 MPa (-0.1 to +0.1 MPa below -20°C -4°F)

Material

Tank interior

Lens: PTFE;
Internal seal: FFKM;
Fastener: SUS304

Housing

PPS PC PA Internal potting agent: Epoxy resin
(when using an Isolated barrier) Barrier: PC
(when using a Zener barrier) Barrier: PC
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: Aluminium die casting, NBR
Cable glands: Nickel-plated brass, chloroprene

Connection diameter

G1-1/2 (40A)

Output

No. of control outputs

Control output/auxiliary output

Analog output

4 to 20 mA (Response time: 3 s after internal value is confirmed [90% response])

Network compatibility

HART

Analog output accuracy

Resolution

1 mm 0.04"*4

Zero accuracy

±0.1 mA (zero point = 4 mA) *4

F.S. accuracy

±0.2 mA (full scale = 20 mA) *4

Power supply

Power voltage

18.3 to 35 VDC.
(when using an Isolated barrier) 24 VDC +25%/-10%
(when using a Zener barrier) 20.1 to 28 VDC
(when using a Zener barrier with a flameproof enclosure) 20.1 to 28 VDC

Power consumption

752.5 mW or less (including analog output; excluding load current)
(when using an Isolated barrier) 3 W or less
(when using a Zener barrier) 602 mW or less
(when using a Zener barrier with a flameproof enclosure) 602 mW or less

Environmental resistance

Ambient temperature

-30 to +60°C -22 to 140°F (no freezing)
(when using an Isolated barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier with a flameproof enclosure) Barrier: -30 to +60°C -22 to 140°F(no freezing)

Relative humidity

Up to 85% RH (no condensation)

Temperature of coupling used

-30 to +85°C -22 to 185°F (no freezing)

Vibration resistance

10 to 500 Hz; Power spectral density: 0.816 G2 X, Y and Z directions

Shock resistance

100 m/s2 (10 G), 16 ms pulses, 1000 times each in X, Y and Z directions

IECEx

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

ATEX and UKEX

Explosion-proof performance

II 1 G Ex ia IIC T4 Ga or II 1 G Ex ia IIB T4 Ga II 1 D Ex ia IIIC T135°C Da
(when using an Isolated barrier) II (1) G [Ex ia Ga] IIC or II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier) II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) II 2 (1) G Ex db [ia Ga] IIB T4 Gb II 2 (1) D Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Type Approval of Electrical Equipment for Use in Explosive Atmospheres

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

NRTL/ACO

Explosion-proof performance

Class I, Zone 0, AEx ia IIC T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups A, B, C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1 or Class I, Zone 0, AEx ia IIB T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1
(when using an Isolated barrier) [AEx ia Ga] IIC or [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups A, B, C, D or Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier) [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier with a flameproof enclosure) Class I, Zone 1, AEx db [ia Ga] IIB T4 Gb/Zone 21, AEx tb [ia Da] IIIC T135°C Db/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1

Zone/Division

Zone 0/20 Division 1
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21 Division 1

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Enclosure rating

IP67 (IEC60529), Enclosure Type 4X (NEMA250)
(when using an Isolated barrier) Barrier: Not specified
(when using a Zener barrier) Barrier: Not specified
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure : IP67 (IEC60529) Enclosure Type 4X (NEMA250)

Protection circuit

Reverse power connection protection, power supply surge protection

Weight

Approx. 920 g 32.45 oz
(when using an Isolated barrier) Barrier: Approx. 320 g 11.28 oz
(when using a Zener barrier) Barrier: Approx. 100 g 3.52 oz
(when using a Zener barrier with a flameproof enclosure) Flameproof enclosure + barrier (without cable glands): Approx. 1300 g 45.85 oz

*1 Guaranteed value in water with the recommended installation. In still water, measurement is possible with water up to the edge of the lens. An undetectable area is present at short range due to the environment and measurement medium. The maximum measuring range is also reduced.
*2 Measurement may not be possible depending on the environment and shape of the target.
*3 Guaranteed value from verification performed at KEYENCE inspection facilities. Measurement errors may occur depending on the customer’s environment.
*4 Guaranteed value from verification performed at KEYENCE inspection facilities with a load resistance of 250 Ω. Measurement errors may occur depending on the customer’s environment.
*5 Associated apparatus are devices that comprise both intrinsically safe and non-intrinsically safe circuits. The FR-LEX20L meets the requirements for intrinsically safe construction when used in conjunction with associated apparatus.

Price on request
Ask for quote
   

Notify Me When Available

Specifications

Model

FR-LEX20L

Type

2-wire explosion-proof model

Measuring range

Up to 15 m 49.2'*1

Display range

Up to 25 m 82.0'*1

Measurable dielectric constant of medium

2 or more *2

Resolution

1 mm 0.04"

Precision

Up to 0.1 m 0.3': ±10 mm 0.39";
0.1 to 10 m 0.3' to 32.8' : ±1 mm 0.04";
10 to 20 m 32.8' to 65.6': ±2 mm 0.08"
*3

Response time

1 s, 4 s (default value), 10 s, 25 s

Tank pressure

-0.1 to +1 MPa (-0.1 to +0.1 MPa below -20°C -4°F)

Material

Tank interior

Lens: PTFE;
Internal seal: FFKM;
Fastener: SUS304

Housing

PPS PC PA Internal potting agent: Epoxy resin
(when using an Isolated barrier) Barrier: PC
(when using a Zener barrier) Barrier: PC
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: Aluminium die casting, NBR
Cable glands: Nickel-plated brass, chloroprene

Connection diameter

G1-1/2 (40A)

Output

No. of control outputs

Control output/auxiliary output

Analog output

4 to 20 mA (Response time: 3 s after internal value is confirmed [90% response])

Network compatibility

HART

Analog output accuracy

Resolution

1 mm 0.04"*4

Zero accuracy

±0.1 mA (zero point = 4 mA) *4

F.S. accuracy

±0.2 mA (full scale = 20 mA) *4

Power supply

Power voltage

18.3 to 35 VDC.
(when using an Isolated barrier) 24 VDC +25%/-10%
(when using a Zener barrier) 20.1 to 28 VDC
(when using a Zener barrier with a flameproof enclosure) 20.1 to 28 VDC

Power consumption

752.5 mW or less (including analog output; excluding load current)
(when using an Isolated barrier) 3 W or less
(when using a Zener barrier) 602 mW or less
(when using a Zener barrier with a flameproof enclosure) 602 mW or less

Environmental resistance

Ambient temperature

-30 to +60°C -22 to 140°F (no freezing)
(when using an Isolated barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier with a flameproof enclosure) Barrier: -30 to +60°C -22 to 140°F(no freezing)

Relative humidity

Up to 85% RH (no condensation)

Temperature of coupling used

-30 to +85°C -22 to 185°F (no freezing)

Vibration resistance

10 to 500 Hz; Power spectral density: 0.816 G2 X, Y and Z directions

Shock resistance

100 m/s2 (10 G), 16 ms pulses, 1000 times each in X, Y and Z directions

IECEx

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

ATEX and UKEX

Explosion-proof performance

II 1 G Ex ia IIC T4 Ga or II 1 G Ex ia IIB T4 Ga II 1 D Ex ia IIIC T135°C Da
(when using an Isolated barrier) II (1) G [Ex ia Ga] IIC or II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier) II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) II 2 (1) G Ex db [ia Ga] IIB T4 Gb II 2 (1) D Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Type Approval of Electrical Equipment for Use in Explosive Atmospheres

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

NRTL/ACO

Explosion-proof performance

Class I, Zone 0, AEx ia IIC T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups A, B, C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1 or Class I, Zone 0, AEx ia IIB T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1
(when using an Isolated barrier) [AEx ia Ga] IIC or [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups A, B, C, D or Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier) [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier with a flameproof enclosure) Class I, Zone 1, AEx db [ia Ga] IIB T4 Gb/Zone 21, AEx tb [ia Da] IIIC T135°C Db/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1

Zone/Division

Zone 0/20 Division 1
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21 Division 1

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Enclosure rating

IP67 (IEC60529), Enclosure Type 4X (NEMA250)
(when using an Isolated barrier) Barrier: Not specified
(when using a Zener barrier) Barrier: Not specified
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure : IP67 (IEC60529) Enclosure Type 4X (NEMA250)

Protection circuit

Reverse power connection protection, power supply surge protection

Weight

Approx. 920 g 32.45 oz
(when using an Isolated barrier) Barrier: Approx. 320 g 11.28 oz
(when using a Zener barrier) Barrier: Approx. 100 g 3.52 oz
(when using a Zener barrier with a flameproof enclosure) Flameproof enclosure + barrier (without cable glands): Approx. 1300 g 45.85 oz

*1 Guaranteed value in water with the recommended installation. In still water, measurement is possible with water up to the edge of the lens. An undetectable area is present at short range due to the environment and measurement medium. The maximum measuring range is also reduced.
*2 Measurement may not be possible depending on the environment and shape of the target.
*3 Guaranteed value from verification performed at KEYENCE inspection facilities. Measurement errors may occur depending on the customer’s environment.
*4 Guaranteed value from verification performed at KEYENCE inspection facilities with a load resistance of 250 Ω. Measurement errors may occur depending on the customer’s environment.
*5 Associated apparatus are devices that comprise both intrinsically safe and non-intrinsically safe circuits. The FR-LEX20L meets the requirements for intrinsically safe construction when used in conjunction with associated apparatus.

Model

FR-LEX20L

Type

2-wire explosion-proof model

Measuring range

Up to 15 m 49.2'*1

Display range

Up to 25 m 82.0'*1

Measurable dielectric constant of medium

2 or more *2

Resolution

1 mm 0.04"

Precision

Up to 0.1 m 0.3': ±10 mm 0.39";
0.1 to 10 m 0.3' to 32.8' : ±1 mm 0.04";
10 to 20 m 32.8' to 65.6': ±2 mm 0.08"
*3

Response time

1 s, 4 s (default value), 10 s, 25 s

Tank pressure

-0.1 to +1 MPa (-0.1 to +0.1 MPa below -20°C -4°F)

Material

Tank interior

Lens: PTFE;
Internal seal: FFKM;
Fastener: SUS304

Housing

PPS PC PA Internal potting agent: Epoxy resin
(when using an Isolated barrier) Barrier: PC
(when using a Zener barrier) Barrier: PC
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: Aluminium die casting, NBR
Cable glands: Nickel-plated brass, chloroprene

Connection diameter

G1-1/2 (40A)

Output

No. of control outputs

Control output/auxiliary output

Analog output

4 to 20 mA (Response time: 3 s after internal value is confirmed [90% response])

Network compatibility

HART

Analog output accuracy

Resolution

1 mm 0.04"*4

Zero accuracy

±0.1 mA (zero point = 4 mA) *4

F.S. accuracy

±0.2 mA (full scale = 20 mA) *4

Power supply

Power voltage

18.3 to 35 VDC.
(when using an Isolated barrier) 24 VDC +25%/-10%
(when using a Zener barrier) 20.1 to 28 VDC
(when using a Zener barrier with a flameproof enclosure) 20.1 to 28 VDC

Power consumption

752.5 mW or less (including analog output; excluding load current)
(when using an Isolated barrier) 3 W or less
(when using a Zener barrier) 602 mW or less
(when using a Zener barrier with a flameproof enclosure) 602 mW or less

Environmental resistance

Ambient temperature

-30 to +60°C -22 to 140°F (no freezing)
(when using an Isolated barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier) Barrier: -30 to +60°C -22 to 140°F (no freezing)
(when using a Zener barrier with a flameproof enclosure) Barrier: -30 to +60°C -22 to 140°F(no freezing)

Relative humidity

Up to 85% RH (no condensation)

Temperature of coupling used

-30 to +85°C -22 to 185°F (no freezing)

Vibration resistance

10 to 500 Hz; Power spectral density: 0.816 G2 X, Y and Z directions

Shock resistance

100 m/s2 (10 G), 16 ms pulses, 1000 times each in X, Y and Z directions

IECEx

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

ATEX and UKEX

Explosion-proof performance

II 1 G Ex ia IIC T4 Ga or II 1 G Ex ia IIB T4 Ga II 1 D Ex ia IIIC T135°C Da
(when using an Isolated barrier) II (1) G [Ex ia Ga] IIC or II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier) II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) II 2 (1) G Ex db [ia Ga] IIB T4 Gb II 2 (1) D Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Type Approval of Electrical Equipment for Use in Explosive Atmospheres

Explosion-proof performance

Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da
(when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC
(when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db

Zone

Zone 0/20
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

NRTL/ACO

Explosion-proof performance

Class I, Zone 0, AEx ia IIC T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups A, B, C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1 or Class I, Zone 0, AEx ia IIB T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1
(when using an Isolated barrier) [AEx ia Ga] IIC or [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups A, B, C, D or Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier) [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1
(when using a Zener barrier with a flameproof enclosure) Class I, Zone 1, AEx db [ia Ga] IIB T4 Gb/Zone 21, AEx tb [ia Da] IIIC T135°C Db/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C /Class III, Division 1

Zone/Division

Zone 0/20 Division 1
(when using an Isolated barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier) Do not install in a hazardous location (associated apparatus*5)
(when using a Zener barrier with a flameproof enclosure) Zone 1/21 Division 1

Electrical ratings

Ui: 35 VDC / Ii: 142.4 mA / Pi: 1000 mW / Li: 26.2 nH / Ci: 79 nF
(when using an Isolated barrier) Um: 250 VRMS / Uo: 26.78 VDC / Io: 115.307 mA / Po: 772 mW / Lo (IIC): 0.2 mH / Co (IIC): 0.092 μF / Lo (IIB): 0.2 mH / Co (IIB): 0.72 μF
(when using a Zener barrier) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF
(when using a Zener barrier with a flameproof enclosure) Um: 250 VRMS / Uo: 34.33 VDC / Io: 112.007 mA / Po: 961.3 mW / Lo: 1.0 mH / Co: 0.37 μF

Temperature

-30°C -22°F ≤ Ta ≤ 60°C 140°F / -30°C -22°F ≤ Tp ≤ 85°C 185°F
(when using an Isolated barrier) ─
(when using a Zener barrier) ─
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure: -30°C -22°F ≤ Ta ≤ 60°C 140°F

Enclosure rating

IP67 (IEC60529), Enclosure Type 4X (NEMA250)
(when using an Isolated barrier) Barrier: Not specified
(when using a Zener barrier) Barrier: Not specified
(when using a Zener barrier with a flameproof enclosure) Explosion-proof enclosure : IP67 (IEC60529) Enclosure Type 4X (NEMA250)

Protection circuit

Reverse power connection protection, power supply surge protection

Weight

Approx. 920 g 32.45 oz
(when using an Isolated barrier) Barrier: Approx. 320 g 11.28 oz
(when using a Zener barrier) Barrier: Approx. 100 g 3.52 oz
(when using a Zener barrier with a flameproof enclosure) Flameproof enclosure + barrier (without cable glands): Approx. 1300 g 45.85 oz

*1 Guaranteed value in water with the recommended installation. In still water, measurement is possible with water up to the edge of the lens. An undetectable area is present at short range due to the environment and measurement medium. The maximum measuring range is also reduced.
*2 Measurement may not be possible depending on the environment and shape of the target.
*3 Guaranteed value from verification performed at KEYENCE inspection facilities. Measurement errors may occur depending on the customer’s environment.
*4 Guaranteed value from verification performed at KEYENCE inspection facilities with a load resistance of 250 Ω. Measurement errors may occur depending on the customer’s environment.
*5 Associated apparatus are devices that comprise both intrinsically safe and non-intrinsically safe circuits. The FR-LEX20L meets the requirements for intrinsically safe construction when used in conjunction with associated apparatus.

All PLC Direct products come with a 1-year warranty. The warranty is issued by PLC Direct. Warranty coverage commences at the date of purchase. The warranty is for mechanical defects or failures not caused by human factors including but not limited to (a) incorrect installation, (b) operating the unit in sub-optimal conditions or in scenarios not recommended by the manufacturer, (c) poor unit maintenance, etc. The warranty does not cover programming or software related issues.

If the product is eligible for PLC Direct’s warranty coverage and the customer encounters an issue with the product, we will request the item is shipped to us for diagnosis and examination. Regardless of the cause of product issues, the customer will bear responsibility for the cost of shipping the unit to PLC Direct for evaluation. Where the unit was damaged by human factors, we will offer a repair or replace quote; in cases where damage was caused by human factors, the customer is responsible for the cost of shipping the repaired/replaced unit from PLC Direct to the customer. Where the unit was not damaged by human factors but is covered by PLC Direct’s warranty, we will repair or replace the unit at our cost (or, in rare cases, refund you your purchase); in such cases, PLC Direct will bear the cost of shipping the repaired or replaced product back to the customer. It is up to PLC Direct’s discretion whether to repair, replace, or refund the customer in such cases. Diagnoses can take time to complete based on technician availability and the complexity of diagnosis.

In no event shall PLC Direct be liable for any damages except actual damages up to, but not exceeding, the amount paid to us for the product, including we shall not be liable for any consequential or indirect damages or lost profits whether or not advised of same.

PLC Direct offers free shipping worldwide. Product ship from a various warehouses worldwide based on the customer's and the product's location. The estimated delivery date on the product page is PLC Direct's best estimated assuming a US-based shipping destination.

Regardless of where the product is shipping from, PLC Direct covers all duties for US-based shipping destinations. For non-US-based shipping destinations, customers are responsible for duties as appropriate.

PLC Direct's focus is on balancing price with lead time. Some but not all products can be expedited. If you have questions about delivery ETAs, please contact our team.

Trusted By

"Fast service for obsolete parts"

Increasingly PLC/ HMI control platforms are becoming obsolete and parts are no longer supported, however PLC Direct had the HMI we needed and fast shipping for our system to get back online!

Buyer at GE Health

"Helping us move projects forward"

With supply chain issues increasingly affecting our business, PLC Direct has been there for us to supply the PLC products we need, when we need it. If they don't have it readily available, they find it and provide it quickly and reliably. This has helped us move forward with several projects that would have otherwise taken us many, many months to complete.

Buyer at E-Merge Systems – A Rockwell Integrator