Long range Sensor main unit Chemical model FR-LP20L

FR-LP20L - Long range Sensor main unit Chemical model

*Please note that accessories depicted in the image are for illustrative purposes only and may not be included with the product.

  • CE Marking
  • CSA





Long range Chemical model

Measuring range

Max. 15 m 49.2 ft*1

Display range

Max. 25 m 82.0 ft*1

Measurable dielectric constant of medium

2 or more*2


1 mm


Less than 0.1 m: ±10 mm 0.1 to 10 m: ±1 mm 10 to 20 m: ±2 mm*3

Response time

0.4 s, 1.5 s, 4 s (default), 10 s

Tank pressure

-0.1 to +0.1 Mpa


Tank interior

Lens: PTFE
Internal packing: FKM
entering part: PPS



Connection diameter

G1-1/2 (40A)


No. of control outputs

Max. 5

Control output/auxiliary output

NPN/PNP open collector (switchable), 30 VDC max., 50 mA max. for each output,
residual voltage: 1.4 V max. (50 mA max.), N.O./N.C. switchable, IO2 is switchable to IO-Link

Analog output

0 to 20mA/4 to 20 mA, maximum load resistance: 260 Ω
(Response time: 0.2 s after control output determined [90% response])

External input

Network compatibility

IO-Link v1.1/COM2

Analog output accuracy


1 mm*4

Zero accuracy

±0.1 mA (zero = 4 mA)*4

F.S. accuracy

±0.2 mA (F.S. = 20 mA)*4

Power supply

Power voltage

24 VDC+25%/-20%
including ripple, Class 2/LPS

Power consumption

98 mA max. (including analog output and excluding load current)

Environmental resistance

Ambient temperature

Built-in and separated display: −10 to +50°C (no freezing)*5*6
Separated head: −10 to +60°C (no freezing)*5*6

Relative humidity

Max. 85%RH (no condensation)

Temperature of coupling used

-10 to +85°C (no freezing)*5*6

Vibration resistance

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

Shock resistance

100 m/s2 (approx. 10 G), 16 ms pulses, 1000 times each for X, Y and Z axes

Enclosure rating

IP67(IEC60529), Enclosure Type 4X(NEMA250)

Protection circuit

Protection against reverse power connection, power supply surge, output overcurrent, and output surge


Approx. 400 g

*1 Value guaranteed with water and the recommended mounting method. With still water, measurement is possible right up to the lens surface. An undetectable area on the near side occurs due to the relationship between the environment and the target medium. Additionally, the maximum measuring distance decreases.
*2 The target shape or the environment may make measurement impossible.
*3 This value is guaranteed by KEYENCE inspection facilities. Errors may occur due to your environment.
*4 With a load resistance of 250 Ω, this value is guaranteed by KEYENCE inspection facilities. Errors may occur due to your environment.
*5 On the FR-LM20(L)/LP20(L), selecting [Off when no op.] for “Brightness” allows for use in an environment 10°C higher than the ambient temperature regulation.
*6 When performing SIP with the FR-LM(H)20(L)/LP(H)20(L)/LS20(L), turn the power supply off, and then perform this operation for 1 hour or less with an ambient temperature of 40°C or less and an internal system temperature of 130°C. Also, be sure to attach a ferrule mounting bracket and an internal gasket, which are optional KEYENCE products.

Data Sheet (PDF) Other Models