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-228, M8 Threaded Cylindrical Sensor

  • Drawing of MS-228 Threaded Sensor


30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Contact. Higher Shock Limits. 0.75 mm pitch M8 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 M8 threaded brass sensor is built for mounting in threaded holes and switch up to 30W loads. It is particularly useful in industrial 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-228 Cylindrical Sensor

MS-228 actuation-magnet parallel to sensor Operate and release distances for the MS-228 M8 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)A2.50
DC Switching Voltage (max)VDC230
Breakdown Voltage (min)VDC350
Contact Resistance (max)200
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-228-(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-228-4-500-S denotes MS-228 Threaded Sensor in 25-30 Operate Band (AT), with 500 mm cable length and Stripped 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

Fire safety Emergency Doors Use Magnet Sensors

fire safety exit Fire Safety Emergency Doors Fire safety building codes provide standards for the safety, welfare and general health of the personnel 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

Reed Sensors to Prevent Cargo Container Tampering

cargo container Containerized Cargo Cargo container theft poses a significant global challenge, resulting in the loss of hundreds of millions of Continue reading ->

Jun 10, 2024

Exhaust Emissions Sensing Using Reed Switches

Automotive exhaust fume emission Automobile Exhaust Pollution, characterised by greenhouse gases and smog, significantly contributes to global warming, underscoring the Continue reading ->

Jun 11, 2024

Bridge control in Airports Use Magnet Sensors

Reed switches in airport bridge control Airplane Bridge Control In airports, as the boarding bridge approaches within a critical meter of the door, meticulous adjustments are Continue reading ->

Jun 13, 2024

Treadmills Use Magnet Sensors for Belt Speed Sensing

Reed switches in treadmill Treadmills Magnet Sensors find a few applications in treadmills for speed and gradient sensing. The speed of the belt is determined by Continue reading ->

Jun 20, 2024

Extensometers Use Reed Switches for Depth Checks

Reed switches in magnet extensometer Extensometers Deep excavations preceding construction projects require careful monitoring to ensure safety. Settlement depths must be Continue reading ->

Jun 12, 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

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

Elevator Circuits Use Latching Reed Switches for Floor Sensing

latching reed switch in an elevator Elevator Elevators, or lifts, as they're known in some regions, are familiar fixtures in urban landscapes. While their electrical Continue reading ->

Jun 12, 2024

Liquid detection Probes Use Reed Switches

Deep bore squid detection probe Liquid Detection Probe Boring holes in the ground serves various purposes, such as extracting water, gases, or conducting geological Continue reading ->

Jun 13, 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

Anti-lock braking system (ABS) Use Reed Sensors

Reed switches in ABS control system Anti-lock Braking The Anti-lock Braking System (ABS) represents a pivotal safety feature utilized not only in vehicles but also in Continue reading ->

Jun 11, 2024

Brake Light control on Two Wheelers Using Reed Switches

Two wheeler brake light Brake light In motorbikes and other two-wheelers, the activation of brake lights upon depression of the front and rear brake levers is Continue reading ->

Jun 11, 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

Reed sensors in Contact protection Circuits

Reed switches in inrush current protection Pump causing in-rush current Contact protection is required for any heavy load switching device, such as pumps mechanical, magnetic or Continue reading ->

Mar 7, 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-228 Threaded Magnet Sensor
MS-228 Cylindrical Magnet Sensors: 60W, M8 threaded, omnipolar, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-228
4.0 based on 3 reviews