MS-108 Standard Size PCB Mountable Reed Sensor
Features
10W Contact Rating. 20.3 mm PCB Pitch. Normally Open contact. Two sensitivity bands. Two Lead Formations. Bulk Packed in Boxes.
Benefits
Omni-polar. Does not require power for operation. Sputtered Ruthenium Contact. RoHS Compliant. Not ESD Sensitive.
Description
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
 | Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading Nov 18, 2020 |
Actuation Distances for MS-108 Reed Sensors
 | Operate and release distances for the MS-108 reed sensor in the two standard AT bands when actuated with standard magnets are listed Continue reading Oct 30, 2020 |
Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 1.50 |
| DC Switching Voltage (max) | VDC | 180 |
| Breakdown Voltage (min) | VDC | 200 |
| Contact Resistance (max) | mΩ | 150 |
| Insulation Resistance (min) | Ω | 109 |
| Capacitance (typ) | pF | 0.2 |
Miscellaneous
| Operate Time (max) | ms | 0.35 |
| Bounce Time (max) | ms | 0.30 |
| Release Time (max) | ms | 0.10 |
| Resonance Frequency (typ) | Hz | <2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature Range | °C | -40 to +140 |
| Shock Resistance (½Sin wave for 11ms) | G | 30 |
| Vibration Resistance (10-2000 Hz) | G | 20 |
Ordering Code
MS-108-(Operate Band Code)
| Operate Band Code | ||
| 1 | AT | 10-15 |
| 2 | AT | 15-20 |
| 3 | AT | 20-25 |
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
 | For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading Aug 27, 2020 |
Product Handling
 | Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass Continue reading Aug 31, 2020 |
Reflow Soldering
 | Reflow Soldering is a process of automatically soldering multiple devices on a PCB. This is usually done after components are Continue reading Aug 28, 2020 |
Manual Soldering
 | Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage Continue reading Nov 10, 2020 |
Ferro-magnetic parts
 | Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence. Continue reading Sep 4, 2019 |
Reed Contact Protection Circuits
 | 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 Aug 31, 2020 |
Applications
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
 | Containerized Cargo Cargo theft is an international problem and hundreds of millions of dollars of goods are lost due to pilferage and Continue reading Nov 7, 2020 |
Reed sensors for Tamper-proofing Electricity Meters
 | Electric Companies use meters calibrated to measure 1 kilo-watt-hour and also measure maximum demand, which is the peak kilo-watt Continue reading Nov 6, 2020 |
Reed sensors in Wind Vanes
 | Wind Vane A weather vane is an instrument used to show the direction of the wind. A regular weather vane usually consists of a pointer Continue reading Nov 7, 2020 |
Reed sensors in Survival rafts and ELTs
 | Emergency Raft Survival rafts contain water sensors which trigger the compressed air cylinder to inflate the raft when dropped into the Continue reading Nov 7, 2020 |
Flow Meters for checking Lake currents
 | Lake Current Meter Underwater currents in lakes and other water bodies are caused by various factors such as pressure gradients due to Continue reading Nov 7, 2020 |
Magnet sensors for Anchor, Rudder, and Hatch position detection
 | Boat Hatch Conventional and recreational sailing craft derive power from sails, and the sailor adjusts the alignment of each sail, Continue reading Nov 7, 2020 |
Reed sensors in Central Locking of Cars with Remote Keys
 | Automobile Key Central locking allows the driver or front passenger to simultaneously lock or unlock all the doors of an automobile. Continue reading Nov 7, 2020 |
Reed switches in Instant Water heaters and Power showers
 | Bathrooms appliances such as Instant Water Heaters and power showers use reed switch based Flow switches to detect if the water supply Continue reading Nov 6, 2020 |
Magnet Sensors in Fluid Metering
 | Fluid Meter In most large cities, utility companies or closed communities run piped Water and Liquefied Petroleum Gas, LPG, to all Continue reading Nov 7, 2020 |
Magnet sensors for Tension Monitoring in Coil Winders
 | Coil Winder Coil Winders help wind bobbins with Copper wire and these bobbins are used in various applications such as in reed relay Continue reading Nov 6, 2020 |