M18 through-beam photoelectric sensor OBP1-18.10.FKL

Sn=20m, PNP/NO+NC, 9-36VDC, 250mA, M18x65mm

Price 57.2 EUR no VAT

The OBP1-18.10.FKL infrared photoelectric through-beam sensor for direct current operates in a wide range of ambient light. The sensor consists of a receiver and a transmitter which are located in two cylindrical plastic housings M18x65mm. The receiver is with output type PNP, with one normally open and one normally closed contact. The maximum distance of operation of the photoelectric sensor is 20m. The transmitter ends with a 2-wire PVC connecting cable with a length of 2m. The receiver ends with a 4-wire PVC connecting cable with a length of 2m and has an LED indicator showing the output state. The optical sensor is protected from improper inclusion of the cables, overcurrent and short-circuit at the outputs.

Application and operating principle

The presented M18/L photoelectric through-beam switch is used for operation in a wide range of ambient light - from dark to direct sunlight without changing its sensitivity and operating distance (Sn). Can be used indoors and outdoors. It is designed for switching direct current electrical circuits. The sensor is a system of two housings - transmitter and receiver, located opposite each other. They are interconnected by a modulated infrared light beam. When an object passes between the emitter and the receiver, the light beam is interrupted and the output of the receiver is switched from one state to another. The receiver output indicator lights up when the receiver output is active.


Operating distance, Sn 0...20 m
Supply voltage, Us 9…36 VDC (Ripple ±10 %)
Residual voltage (max), Ures 0,8 V (I = 250 mA)
Load current (max), Iout 250 mА
Protection of output (scanning), Iprot 350 mA (25ºС)
Current consumption, Is 25 mА (16mA / T + 9mA / R)
Switching frequency (max), fo 250 Hz
Spectrum area of operating 850…950 nm
Operating ambient illumination 0...180’000 Lx
Operating temperature range, Tamb -25º…+70º C
Degree of protection IP65
Light output indicator LED
Connection cable - transmitter 2x0.25 mm², L=2 m, PVC
Connection cable - receiver 4x0.25 mm², L=2 m, PVC
Overall dimensions M18x1, L=65 mm
Housing - plastic PVC


Overall dimensions (mm)

Overall dimensions of M18 barrier optical sensor

Short description

The M18/L optoelectronic barrier sensor is used in industrial systems, as electronic automation equipment for switching at 3-wire and 4-wire electrical circuits of direct current. When passing a nontransparent object between the receiver and the transmitter, the optical connection breaks and the receiver's output switches. The barrier photoelectric sensor there is a longer period of work due to contactless switching of the electrical circuits in which is included.


OBP1-18.10.FKLPNP / NO + NC
OBP1-18.20.FKLNPN / NO + NC