MS-328 Flat Pack Reed Sensors with Actuator
Features
10W Contact Rating. Normally 30W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Contact. Higher Shock Limits. Easy Screw Mounting.
Benefits
Omni-polar. Does not require power for operation. RoHS Compliant. Not ESD Sensitive. Various Cables and Connectors Available. Actuator with same Housing available.
Description
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
 | Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading Nov 18, 2020 |
Actuation Distances for MS-328 Flat Pack Sensor
 | Operate and release distances for the MS-328 standard size Flat pack sensor in the three standard AT bands when actuated (as shown in the Continue reading Oct 30, 2020 |
Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 30.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 2.50 |
| DC Switching Voltage (max) | VDC | 230 |
| Breakdown Voltage (min) | VDC | 350 |
| 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 | 0.15 |
| Resonance Frequency (typ) | Hz | >2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature Range | °C | -40 to +70 |
| Shock Resistance (½Sin wave for 11ms) | G | 50 |
| Vibration Resistance (10-2000 Hz) | G | 20 |
Ordering Code
MS-328-(Operate Band Code)-(Cable Length in mm)-(Cable Termination Code)
| Operate Band Code | ||
| 3 | AT | 20-25 |
| 4 | AT | 25-30 |
| 5 | AT | 30-35 |
| Cable Termination Code | Termination Type |
| S | Stripped to 5.0 mm |
| T | Stripped 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
 | 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 |
Effects of Temperature
 | The normal operating temperature range for a reed contact is -40°C to +200°C, but too steep a rise or drop in temperature may 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 |
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 |
Cable Handling
 | Magnet Sensor Cable Handling When using Reed Switches soldered to cables, or when using off the shelf Magnet Sensors with cables, some 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-328 Magnet Sensor is known to perform well.
Magnet Sensors for Securing Fire safety and Emergency Exits
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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 |
Magnet sensors in Welding Equipment
 | Welding Equipment Welding machine power supplies are classified as either Constant Current or as Constant Voltage types. In Constant Continue reading Nov 7, 2020 |
Reed switches in Floor detection in Elevators and Lifts
 | Elevator Most people are aware of Elevators, or lifts, as they are called in certain areas of the world. The electrical motors in Continue reading Nov 7, 2020 |
Magnet Sensors for Door and window Security
 | Door/Window Security Home and Workspace security is paramount and most newly constructed spaces integrate security products during Continue reading Nov 6, 2020 |
Reed sensors in Rowing Electronics
 | Row Boat Rowing electronics are useful for tracking rowing information, both in actual competitive rowing as well as in rowing machines Continue reading Nov 7, 2020 |
Accidental airbag deployment prevention
 | Airbag deployment The airbag module is designed to inflate extremely rapidly then quickly deflate during a collision or a rapid sudden Continue reading Nov 7, 2020 |
Reed switches for Door sensing on Copiers and Scanners
 | Paper Scanner A Paper Scanner or just scanner for short, is a device that uses an optical head to scan images or printed documents. The Continue reading Nov 6, 2020 |