M8 through-beam photoelectric sensor OBM1-08.12.FK

Sn=1m, PNP/NC, 9-36VDC, 250mA, M8x46mm

Price 39 EUR no VAT

The OBM1-08.12.FK infrared photoelectric through-beam sensor for direct current consists of a receiver and transmitter which are located in two cylindrical metallic housings M8x46mm. The receiver is with output type PNP, with one normally closed contact. The maximum distance of operation of the photoelectric sensor is 1m. The transmitter ends with a 2-wire PVC connecting cable with a length of 2m. The receiver ends with a 3-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 output.

Application and operating principle

The presented M8 photoelectric through-beam switch 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...1 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 17 mА (10mA / T + 7mA / R)
Switching frequency (max), fo 300 Hz
Spectrum area of operating 850…950 nm
Operating ambient illumination 0...10’000 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 3x0.25 mm², L=2 m, PVC
Overall dimensions M8x1, L=46 mm
Housing - metallic CuZn (Ni plated)


Overall dimensions (mm)

Overall dimensions of M8 barrier optical sensor

Short description

The M8 optoelectronic barrier sensor is used in industrial systems, as electronic automation equipment for switching at 3-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.


OBM1-08.11.FKPNP / NO
OBM1-08.12.FKPNP / NC
OBM1-08.21.FKNPN / NO
OBM1-08.22.FKNPN / NC