Sensing Guide Pulse Level SensorFL series


Amplifier Unit, Standard Specification


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Standard (G3/4)

Measurement range

100 to 2,000 mm 3.94" to 78.74"

Specific conductive capacity of measurable media

2 or more*1


1 mm 0.04"*2


±3 mm ±0.12"*2

Temperature characteristics

0.1 mm/°C

Undetectable area

In the case of water

Top side

25 mm 0.98"

Bottom side

10 mm 0.39"*3

In the case of oil

Top side

50 mm 1.97"

Bottom side

30 mm 1.18"*3

Judgment output response time

0.4 s minimum

Probe horizontal torque

6 N m

Tank pressure

-0.1 to +0.5 Mpa

Connection port


Control output

Judgment output/alarm output

NPN/PNP open collector (selectable), 30 VDC max., 50 mA max. for each
Residual voltage: 2 V max. for NPN, 2.5 V max. for PNP, N.O./N.C. switchable

Analog output

4 to 20 mA, maximum load resistance: 350 Ω (Response time: 0.1 s after comparator output determined [90 % response])
Ripple when target remains stationary (P-P) 2 % of F.S. max.

Analog output accuracy


1 mm 0.04"

Zero accuracy

±0.1 mA (Zero point = 4 mA)

Full scale accuracy

±0.2 mA (full scale = 20 mA)

Applicable cable

8-pin M12 connector


Power voltage

10 to 30 VDC, ripple (P-P) 10% included, Class 2 or LPS

Current consumption

300 mA max. (at 10 V)/120 mA max. (at 30 V) (excluding load)

Environmental resistance

Enclosure rating


Ambient temperature

-20 to +60 °C -4 to +140°F

Relative humidity

35 to 85 % RH (No condensation)


Operating medium temperature

-20 to +100 °C -4 to +212 °F

Environmental resistance

Vibration resistance

10 to 55 Hz, 0.75 mm 0.03" double amplitude in X, Y and Z directions, 2 hours respectively

Shock resistance

300 m/s2 in 6 directions, 3 times respectively


Liquid end materials

Probe: SUS304
Housing bottom seal section: PTFE
Packing: FKM (bottom of the shielded part)


Metal section of the housing: SUS304, SUS303
Plastic section of the housing: PBT, PAR, NBR, HNBR, PET


400 g

*1 These values were measured at the position of 100 mm 3.94" or less from the wall of a metal tank. Contact KEYENCE for the case of a plastic tank.
*2 These values were measured under the following conditions.
Medium: Water, Tank material: Metal, Linearity range: Between 6 cm 2.36" from the top and 1 cm 0.39" from the bottom, Average time: 4 s
*3 For the sanitary/plastic types, the undetectable area from the bottom end varies depending on the length of the probe.

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