MK11 Series

Magnetically operated Reed Sensors with screw thread enclosure


MK11 sensors are magnetically operated Reed Sensors with screw thread enclosure supplied with interconnect cable.  The sensor should be mounted on a fixed surface with the actuating magnet on the moving surface. The sensor and magnet must be fixed in a definite distance to each other.  The sensor is mostly operated from the 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


Piston end travel and position detection

End motion detection for linear drives

Machinery industry


Tolerance +/- 0.10mm (0.004 inch)

Dimension Drawing


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
X Individual crimped terminals 1mm(0.04inch) diameter
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 72 81
Contact form A/dry A/dry A/dry
Rated Power max. (W) 10 15 5
Switching voltage max. (VDC) 1801 200 90
Switching current max. (A) 0.5 1.0 0.5
Carry current (A) 1.02 1.25 1.0
Contact resistance max. (mOhm) 150 150 200
Breakdown voltage (contact/contact) min. (VDC) 2103 2504 100
Operating time incl. bounce (ms) 0.5 0.5 0.5
Releasing time (ms) 0.1 0.1 0.1
Operating temperature (°C) -20/+85 -20/+85 -20/+85
Storage temperature (°C) -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  4Range E:  320 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 71/72

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

MK11 – 1A71 C – 500 W

MK11 Reed Sensor, 1 form A switch type 71, Sensitivity class C, Cable length 500mm, Termination W

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