MK13 Series

Sensors with mounting holes for screw fastening


MK13 are magnetically operated Reed Sensors with mounting holes and connecting cable.  The technical design corresponds to the series MK4 except for the long mounting holes offering the possibility of individual adjustment.  The sensor should be mounted on a fixed surface with the actuating magnet, e.g. M13, on the moving surface.  The sensor and the magnet must be fixed in a definite distance to each other.  The sensor is mostly operated from he front; approximation resp. removal of the magnet determines the closing or opening of the Reed Switch.  The magnetic pull-in / drop-out sensitivity is divided into five AT ranges.  A choice of switches, termination options and cable lengths is offered.


Position- and limit switch, e.g. pneumatic or hydraulic actuator position indication and end travel limit switch

End motion detection for linear device

Machinery industry e.g. end motion detection and door/flap control


Tolerance +/- 0.10mm (0.004 inch)


The standard termination is a two-wire flat cable with a cross section of 2 x 0.14mm². The standard length of the cable is 500mm. Other lengths can be supplied on request. The required length has to be stated in the part number. The cable end can be supplied with the following connection styles (please note after the length in the part number).

W Cable end cut, dismantled on 30 mm, cores stripped and tinned on 5 mm (0.2inch)
X Individual crimped terminals 1mm(0.04inch)
Y Individual spade terminals, 2.8 x 0.8mm(0.11 x 0.03inch)
Z “MASCON” sleeve suitable for pcb connector with  2.54mm (0.1inch) pitch

Contact Data

Contact type 71 81 84 90
Contact form A/dry A/dry A/dry B/C/dry
Rated Power max. (W) 10 5 10 3
Switching voltage max. (VDC) 1801 90 400 175
Switching current max. (A) 0.5 0.5 0.5 0.25
Carry current (A) 1.02 1.0 1.0 1.2
Contact resistance max. (mOhm) 150 200 150 150
Breakdown voltage (contact/contact) min. (VDC) 2103 100 700 200
Operating time incl. bounce (ms) 0.5 0.5 2.0 0.7
Releasing time (ms) 0.1 0.1 0.1 1.0
Operating temperature (°C) -20/+85 -20/+85 -20/+85 -20/+85
Storing temperature (°C) -35/+85 -35/+85 -35/+85 -35/+85

Range D and E: 200 VDC  2Range D and E: 1.75 A   3Range D: 280 VDC; Range E: 310 VDC

Other switches by request.

Magnetic Sensitivity

Sensitivity class A B C D E
Pull-in AT range 5-10 10-15 15-20 20-25 25-30
Available switches 81 71 71/84/90

This data relates to unmodified Reed switches before mounting. Please refer to the respective single data sheets for sensitivity data and measurement methods for finished assemblies.

Order information

Ordering example

MK13 – 1A71 C – 500 W

MK13 Reed Sensor, 1 form A switch type 71, Sensitivity class C, Cable length 500mm, Termination W

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