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-108 Standard Size PCB Mountable Reed Sensor

  • MS-108 Reed Sensor Drawing
  • MS-108 Reed Sensor Pad Layout Drawing


10W Contact Rating. 20.3 mm PCB Pitch. Normally Open contact. Two sensitivity bands. Two Lead Formations. Bulk Packed in Boxes.



Omni-polar. Does not require power for operation. Sputtered Ruthenium Contact. RoHS Compliant. Not ESD Sensitive.


This standard size PCB mountable reed sensor is manufactured to carry up to 1.5A. The internal blades always parallel to the top surface of the sensor. Change-over versions can also be built on request. All sensors are tested 100% for Operate AT, Release AT, Static Contact Resistance and Variable Contact Resistance before packing. 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.

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-108 Reed Sensors

RRE MS-108 magnet actuation Operate and release distances for the MS-108 reed sensor in the three standard AT...Continue reading ->


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)ms0.10
Resonance Frequency (typ)Hz<2000
Operating Frequency (max)Hz500
Operating Temperature Range°C-40 to +140
Shock Resistance (½Sin wave for 11ms)G30
Vibration Resistance (10-2000 Hz)G20

Ordering Code

MS-108-(Operate Band Code)

Operate Band Code

Example: MS-108-2 denotes MS-108 Reed Sensor in 15-20 Operate Band (AT).

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

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 ->

Product Handling

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

Reflow Soldering

Drawing of SMD reflow soldering curve Reflow Soldering is the process of automatically soldering multiple devices to a PCB. Continue...Continue reading ->

Manual Soldering

Soldered Reed switch Manual Soldering of reed switch leads may be required when using custom plastic housing...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 ->

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-108 Reed Sensor is known to perform well.

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 ->

Reed sensors for Tamper-proofing Electricity Meters

tamper proof electricity meter To tamper proof Electricity meters, Reed Sensors are placed near the front cover of...Continue reading ->

Reed sensors in Wind Vanes

Reed switches in wind vanes Eight reed switches are mounted radially at 22.5 degree angles making compass points on...Continue reading ->

Reed sensors in Survival rafts and ELTs

Reed switches in survival rafts Survival rafts contain water sensors which trigger the compressed air cylinder to inflate the...Continue reading ->

Flow Meters for checking Lake currents

Reed switches in flow_meter Reed Switches are used in flow meters to calculate volume of liquid. Flow meters...Continue reading ->

Magnet sensors for Anchor, Rudder, and Hatch position detection

Reed switches in hatch position sensing Just as reed sensors are used in automobiles for end position and intermediary position...Continue reading ->

Reed sensors in Central Locking of Cars with Remote Keys

Reed switches in door sensors In newer cars with electronic keys, the key code is compared with onboard computer...Continue reading ->

Reed switches in Instant Water heaters and Power showers

Reed switches in instant water heater Instant Water heaters and power showers use reed switch based Flow switches to detect...Continue reading ->

Magnet Sensors in Fluid Metering

Water meter To make an existing analog fluid meter generate digital output readings that can be...Continue reading ->

Magnet sensors for Tension Monitoring in Coil Winders

Magnet sensors in Winding count and tension sensing and in Coil Winders Reed Sensors find an important role in closed loop tension control and coil winding...Continue reading ->
MS-108 Standard Size PCB Mountable Reed Sensor
Standard Size PCB Mountable Reed Sensor Series: 10W, omnipolar, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-108
4.5 based on 2 reviews