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 Sensor



10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Contact. Higher Shock Limits. 0.5 mm pitch M5 Threaded Barrel.



Omni-polar. Does not require power for operation. RoHS Compliant. Not ESD Sensitive. Various Cables and Connectors Available. For rugged industrial use.


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. Being an omni-polar 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.

Cylindrical and Rectangular Magnets

Standard magnets-RRE Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading ->

Nov 18, 2020

Actuation Distances for MS-225 Cylindrical Sensor

MS-225 actuation-magnet parallel to sensor Operate and release distances for the MS-225 M5 Threaded Magnet Sensor in the three standard AT bands when actuated (as shown in the Continue reading ->

Oct 30, 2020


Contact FormA
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A1.50
DC Switching Voltage (max)VDC180
Breakdown Voltage (min)VDC200
Contact Resistance (max)150
Insulation Resistance (min)Ω109
Capacitance (typ)pF0.2


Operate Time (max)ms0.35
Bounce Time (max)ms0.30
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz500
Operating Temperature Range°C-40 to +70
Shock Resistance (½Sin wave for 11ms)G50
Vibration Resistance (10-2000 Hz)G20

Ordering Code

MS-225-(Operate Band Code)-(Cable Length in mm)-(Cable Termination Code)

Operate Band Code
Cable Termination CodeTermination Type
SStripped to 5.0 mm
TStripped and Tinned

Example: MS-225-1-500-T denotes MS-225 Threaded Sensor in 10-15 Operate Band (AT), with 500 mm cable length and Tinned cable ends.

Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Special Release Limits.

Usage Notes

Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.

Ampere Turn Selection for your Application

Ampere Turn Selection Selecting the appropriate Ampere Turn (AT) or magnetic sensitivity for a Reed Switch, Reed Sensor, or Magnet Sensor is crucial in any Continue reading ->

Jun 16, 2024

Effects of Temperature on Reed Switches and Magnets

effects of temperature The typical operating temperature range for reed contacts spans from -40°C to +200°C, but abrupt temperature changes can potentially Continue reading ->

Jun 16, 2024

Handling of Reed Switches

Dropping Reed switch Handling of Reed Switches Reed Switches, Reed Sensors, and Magnet Sensors are delicate devices prone to developing micro cracks in Continue reading ->

Jun 17, 2024

Ferro-magnetic Parts

Ferro-magnetic parts Reed Switches utilize a nickel-iron alloy, sputter coated with additional Ruthenium to render it ferromagnetic while maintaining low Continue reading ->

Jun 17, 2024

Cable Handling

Twisting cables nearer to housing Magnet Sensor Cable Handling When integrating Reed Switches soldered to cables or using off-the-shelf Magnet Sensors with cables, Continue reading ->

Jun 17, 2024

Protection Circuits for Reed Switches

Inductive Load Protection Circuit It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive. Continue reading ->

Jun 17, 2024


Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the MS-216-L Magnet Sensor is known to perform well.

Side Stand Sensing on Motorcycles and Two Wheelers

Motorcycle Sidestand Side stand Motorcycles, Scooters and other motorized E-bikes have a side stand and a main stand under the chassis. A quick and easy Continue reading ->

Jun 10, 2024

Surveyor’s Wheel Uses Reed Switches for Distance Measurement

surveyor wheel Surveyor's Wheel A Surveyor's Wheel, also known as a Trundle Wheel, serves as a fundamental tool for measuring distances efficiently. Continue reading ->

Jun 12, 2024

Sun-shade Shutter Control Applications Using Reed Sensors

window shutter Sun-shade Shutter Control Sun-shade shutter control systems in Smart Homes are revolutionizing the way we manage light and privacy Continue reading ->

Jun 12, 2024

Keycard Readers Use Reed Sensors to Authorise Entry

Keycard reader for hotel room access Keycard Readers In hotels, ensuring the security of guest rooms while allowing convenient access is paramount. Keycard readers, Continue reading ->

Jun 18, 2024

End position sensing on Pneumatic Cylinders Using Reed Sensors

Reed switches in pneumatic linear slide Actuator End position Sensing Numerous pieces of equipment in industrial automation rely on compressed air, including pneumatic Continue reading ->

Jun 13, 2024

Bicycle and E-bike Speedometers Use Magnet Sensors

Reed switches in bicycle speedometer Bicycle Speedometer Fitness enthusiasts rely on accurate feedback to track their progress and performance metrics, whether it's calorie Continue reading ->

Jun 20, 2024

Adjustable Chairs Use Magnet Sensors for Assessing extents

Reed switches in adjustable chairs Adjustable Chair Motorized adjustable chairs are indispensable in settings like dentists' offices, massage parlours and hair-cutting Continue reading ->

Jun 12, 2024

Explosive Areas Need Reed Switches to safely switch Circuits

Reed switches in explosive area Explosive Areas Explosion-proof enclosures are essential components across various industries such as petroleum, gas, chemical, mining, Continue reading ->

Jun 12, 2024

Fork Lifts and Hoists Use Magnet Sensors for End-position Sensing

Reed switches in end position sensing in fork lifts Fork Lifts The hydraulic pistons and cylinders that drive hoists and fork lifts rely on precise positioning for optimal performance. Continue reading ->

Jun 13, 2024

Anemometers Use Magnet Sensors record Data

Reed switches in anemometer Anemometers Anemometers serve as indispensable tools for measuring wind speed, pivotal in a wide array of applications including Continue reading ->

Jun 14, 2024

Hatch, Anchor and Rudder Position-Sensing Using Reed Sensors

Reed switches in hatch position sensing Boat Hatch In the realm of advanced sailboats and yachts, the integration of sophisticated microprocessor systems revolutionizes Continue reading ->

Jun 14, 2024

Hydraulic arm position sensing Using Magnet Sensors

Reed switches in hydraulic arm end position sensing Hydraulic Arm Bulldozers, earth movers, tractors, forklifts, and garbage compactor trucks rely heavily on hydraulic arm systems to Continue reading ->

Jun 11, 2024

Cruise Control Systems use Reed Switches

Reed switches in cruise control Cruise Control Cruise Control is an automated feature designed to regulate the speed of a motor vehicle, alleviating the need for the Continue reading ->

Jun 12, 2024

Reed switches and Reed sensors in Sewing machine pedals

Reed switches in sweing machine pedals Sewing Machine Sewing machines help stitch fabric, leather or other synthetic materials by using a needle and two thread feeders. In Continue reading ->

Nov 6, 2020

Magnet Sensors in Door position sensing for Home Appliances

Reed switches in door position sensing Home Appliance Door Sensing The proliferation of essential home appliances like refrigerators, washing machines,washers, and dryers Continue reading ->

Mar 1, 2024

Magnet sensors in Satellite dish position sensing in the DTH industry

satellite dish Satellite Dish A satellite dish is a concave device used to transmit and receive information and is used primarily in the Continue reading ->

Mar 7, 2024

MS-225 Threaded Magnet Sensor
MS-225 Cylindrical Magnet Sensors: 10W, omnipolar, M5 threaded complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-225
3.8 based on 7 reviews