Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

MS-225, M5 Threaded Cylindrical Proximity Sensor

MS-225 tip to tip actuation distance M5 Threaded Cylindrical Reed Sensor Drawing
MS-225 parallel actuation distance

Click the thumbnails on the left to view actuation distances


Does not require power for operation Omni-polar device; actuates with either pole of magnet Normally Open contact, others available on request Sputtered Ruthenium contact Thee magnetic sensitivity bands RoHS Compliant and Lead-free Not Sensitive to ESD Various types of leads and connectors available 0.5 mm pitch threaded barrel for fine adjustment Actuator magnet available in same housing


This threaded brass sensor is built for mounting in threaded holes as small as M5 and switch a 10W load. It is particularly useful in applications where distance adjustments need to be made every now and then. Various activating distances are available depending on the magnet and the AT band used. This sensor can be supplied with non-standard connectors on request. All sensors are tested 100% for Operate AT, Release AT, Static Contact Resistance and Variable Contact Resistance before packing. Our products are completely Lead-free and conform to the RoHS directive.


This magnetic proximity sensor is suitable for use in the following applications and in many others: coil winder tension sensing, digital speedometers and tachometers, anemometers, exhaust emission sensingpneumatic cylinders and actuators, fire safety doors, cargo containers


Contact Form A
Contact Rating (max) W/VA 10.0
Switching Current (max) A 0.5
Carry Current (max) A 1.5
DC Switching Voltage (max) VDC 180
Breakdown Voltage (min) VDC 200
Contact Resistance (max) 150
Operating Temperature °C -40 to +70
Shock Resistance (½Sin wave for 11ms) G 50
Vibration Resistance (10-2000Hz) G 20

Ordering Code

MS-225-(Operate AT Code)-(Cable Length in mm)-(Lead Type Code)

OAT Code OAT Band Lead Type Code Code
1 10-15 S Stripped to 5 mm
2 15-20 T Stripped and Tinned
3 20-25

Operate AT bands indicated above are for unmodified reed switch.
Example: MS-225-1-500-T
Denotes MS-225 proximity sensor in 10-15 Operate AT, with 500 mm cable length and Tinned cable ends.

Possible magnet actuations

A few examples of magnet actuation are shown above. Cylindrical proximity sensors can be used in pneumatic cylinder end position sensing applications. Being an omnipolar device, this sensor can be actuated with either a north pole or a south pole or both. Choosing the right AT band, magnet strength, and operating axis, will restrict the number of operates and releases to one. Click here to view actuation distances of this sensor with the standard magnets.

MS-225 Cylindrical Magnetic Proximity Sensor
MS-225 Cylindrical Magnetic Proximity Sensors: 10W, omnipolar, M5 threaded complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-225
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