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-328 Flat Pack Reed Sensors with Actuator



10W Contact Rating. Normally 30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Contact. Higher Shock Limits. Easy Screw Mounting.



Omni-polar. Does not require power for operation. RoHS Compliant. Not ESD Sensitive. Various Cables and Connectors Available. Actuator with same Housing available.


This MS-328 screw mountable sensor can be mounted with M3 screws and can switch loads of up to 30W. 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 We offer a range of magnets in different sizes and shapes, specially selected to...Continue reading ->

Actuation Distances for MS-328 Flat Pack Sensor

MS-324 magnet actuation Operate and release distances for the MS-328 standard size Flat pack sensor in the...Continue reading ->


Contact FormA
Contact Rating (max)W/VA30.0
Switching Current (max)A0.5
Carry Current (max)A2.50
DC Switching Voltage (max)VDC230
Breakdown Voltage (min)VDC350
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-328-(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-328-4-500-T Denotes MS-328 Flat-pack Sensor in 25-30 Operate AT, with 500 mm cable length and Tinned 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

Reed Sensor Manufacturer Cross Reference For any application, it is important to select the correct Ampere Turn (AT) or...Continue reading ->

Effects of Temperature

Thermal sensor Effects of increase and decrease in temperature on reed based products and magnets. Continue...Continue reading ->

Product Handling

Dropping Reed switch Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading ->

Cable Handling

Twisting cables nearer to housing Cables with higher strands should be used so that there is minimal work hardening...Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit When a reed switch is to be connected to an inductive load or a...Continue reading ->


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-328 Magnet Sensor is known to perform well.

Magnet Sensors for Securing Fire safety and Emergency Exits

fire safety exit Normally mechanical switches are used, but as fire safety doors remain closed for many...Continue reading ->

Reed Sensors to Prevent Thievery in Cargo Containers

cargo container Reed Sensors added to the GPS units serve as a theft proof device by...Continue reading ->

Magnet sensors in Welding Equipment

proximity sensors in welding machine The time during which current is being used for welding and the time during...Continue reading ->

Reed switches in Floor detection in Elevators and Lifts

Reed switches in floor detection in lifts Latching reed sensors can be mounted on every floor, and a magnet on the...Continue reading ->

Magnet Sensors for Door and window Security

Reed switches in window security Magnets can be mounted on doors and windows, and reed sensors, on the fixed...Continue reading ->

Reed sensors in Rowing Electronics

Reed switches in rowing electronics Reed Sensors are used in water proof rowing equipment like stroke meters to count...Continue reading ->

Accidental airbag deployment prevention

Reed switches in airbag deployment When a collision occurs, accidental deployment of the airbags is prevented, by sensing whether...Continue reading ->

Reed switches for Door sensing on Copiers and Scanners

scanner In copiers and scanners, reed sensors are used to signal the main processor if...Continue reading ->
MS-328 Flat Pack Reed Sensors with Actuator
MS-328 Flat Pack Reed Sensors: 8 mm slots for screw mounting, 60W line voltage, omnipolar, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-328
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