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MK3- Series Cylindrical magnetically operated Reed Sensors Characteristics MK3 sensors are magnetically operated Reed proximity switches in a cylindrical module, fitted with interconnect cable. The sensor should be mounted on a fixed surface with the actuating magnet, e.g. M3, on the moving surface. The Reed Sensor and magnet must be fixed in a definite distance to each other. Approximation resp. removal of the magnet determines the closing and 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. Applications Position- and limit switch e.g. pneumatic or hydraulic actuator position indication and end travel limit switch Door and window contacts for the security system applications Level sensor use with magnetic floats for water level detection e.g. coffee- makers, washing-machines, dish-washers Dimensions Tolerance +/- 0.10mm (0.004 inch) Termination The standard termination is a two-wire flat cable with a cross section of 2 x 0.14mm². The standard cable length is 500mm, other lengths can be supplied on request. The required length has to be stated on 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

A Specialty Distributor

Call our knowledgable
Staff with your application
questions.

MK3- Series

Cylindrical magnetically operated Reed Sensors

Characteristics

MK3 sensors are magnetically operated Reed proximity switches in a cylindrical module, fitted with interconnect cable. The sensor should be mounted on a fixed surface with the actuating magnet, e.g. M3, on the moving surface. The Reed Sensor and magnet must be fixed in a definite distance to each other. Approximation resp. removal of the magnet determines the closing and 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.

Applications

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

Door and window contacts
for the security system applications

Level sensor
use with magnetic floats for water level detection e.g. coffee-
makers, washing-machines, dish-washers

Dimensions

Tolerance +/- 0.10mm (0.004 inch)

Termination

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

Cable end cut, dismantled on 30 mm, cores stripped and tinned on 5 mm

Individual crimped terminals 1mm(0.04inch) diameter

Individual spade terminals, 2.8 x 0.8mm(0.11 x 0.03inch)

"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	10	5	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	0.5	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

¹Range D & E: 200 VDC ²Range D & 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

MK3 - 1A71 C - 500 W

MK3 Reed Sensor, 1 form A switch type 71, Sensitivity class C, Cable length 500mm, Termination W

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