M8 inductive proximity sensor P1-08.21.K

Sn=2.5mm, 3-wire, NPN/NO, 9-36VDC, 250mA, M8x40mm

Price 24.96 EUR no VAT

Unshielded type P1-08.21.K proximity inductive sensor for direct current with cylindrical plastic housing M8x40mm, with NPN output type, with one normally open contact. The maximum distance of operation of the proximity sensor is 2,5mm. The sensor ends with a 3-wire PVC connecting cable with a length of 2m and has an LED indicator showing the output state of the inductive sensor. The sensor is protected against incorrect connection of cables, overload and short circuit at the output.


The presented unshielded type M8 inductive proximity sensor is used in industrial systems, as automation equipment for switching at 3-wire direct current electrical circuits. It is activated by approaching of metallic object to him active area. The inductive proximity sensor is resistant to moisture and dust. It has a long service life thanks to the non-contact switching of the electrical circuit in which it is connected.


Operating distance, Sn 2,5 mm
Hysteresis, h 4-15%
Supply voltage, Us 9…36 Vdc (Ripple ±10%)
Output voltage (max), Uout 39 Vdc (open drain)
Residual voltage (max), Ures 0,8 V (I = 250 mA)
Load current (max), Iout 250 mА
Protection of output (scanning), Iprot 350 mA (25°С)
Current consumption, Is 7 mA
Switching frequency (max), fo 1200 Hz (Sn=1,2 mm)
Time of fall and rise, tf / tr 2 µs / 2 µs
Operating temperature range, Tamb -25°…+70° C
Degree of protection IP67 (IEC144)
Light output indicator LED
Joining cable 3x0.25 mm², L=2 m, PVC
Overall dimensions M8x1, L=40 mm
Housing - plastic PVC

Scheme of connection


Overall dimensions (mm)

Overall dimensions of inductive sensor M8K, L=40

Type parameters of 3-wire unshielded inductive sensors with cable M8/K, DC

P1-08.11.KPNP / NO
P1-08.12.KPNP / NC
P1-08.21.KNPN / NO
P1-08.22.KNPN / NC