C K MPS45WGW Magnetic Proximity Sensors Instructions
- June 13, 2024
- C K
Table of Contents
C K MPS45WGW Magnetic Proximity Sensors
Product Information
The MPS Series Magnetic Proximity Sensors are contact-type sensors designed to detect the presence or absence of a magnet in close proximity. They feature a SPST NO (Contact Form A) electrical circuit, which means the reed switch opens when the magnet is removed from proximity and closes when the magnet is within the actuation range. The sensors have a contact rating of 50V AC/DC 50/60Hz 5W (0.25A maximum) for resistive loads. The contact resistance is 100 mΩ maximum initially, and the dielectric strength is 200V DC minimum. The mechanical and electrical life of the sensors is rated at 4 million operations. The product is packaged in bulk packaging with 10 switch and magnet pairs per package.
The housing, spacer, and cover of the sensors are made of ABS plastic (UL94V-0) in white color. The reed switch consists of rhodium coated reed contacts in a hermetically sealed, nitrogen-filled glass capsule. The wire leads are UL 1061/UL1007/UL2468 22 AWG stranded wires made of copper or aluminum. They have a length of 12 inches with stripped ends and are white in color. The wires are potted with epoxy for protection. The magnets used are NdFeB magnets, and the adhesive mounting is done using a foam-backed, pressure-sensitive adhesive with a release liner.
Product Usage Instructions
- Ensure that the switch and magnet are parallel to each other and never in a ‘T’ configuration during installation.
- For recessed and surface mount contacts, the magnet position gap distance must be carefully considered. The gap distance is a combination of the horizontal and vertical plane separation between the switch and magnet.
- To determine the make gap, consider the offset of centerlines and distance between the faces of the switch and magnet. Refer to the actuation chart provided in the user manual for specific measurements.
- When installing a recessed magnet, if it is off-center by 1/4 from the centerline of the switch, the make gap is reduced by 1/4.
- Ensure proper center alignment of the switch and magnet for correct configuration.
- Incorrect alignment, such as off-center alignment, may result in a larger make gap and affect the proper functioning of the sensor.
- Refer to the user manual or consult the Customer Service Center for information on specific and custom switches.
Features/Benefits
- Long life—4M operations
- Sealed contacts
- Quality construction
- Quick and easy installation
- UL 61058 approved
Typical Applications
- Automotive sensors and indicators
- Industrial sensors
- Factory automation equipment
- Server / storage
- Security, alarms for windows
Specifications
CONTACT RATINGS: 50V AC/DC 50/60Hz 5W (0.25A maximum)
RESISTIVE
CONTACT RESISTANCE: 100 m Ω max. initial.
DIELECTRIC STRENGTH: 200 V DC min.
ELECTRICAL CIRCUIT: SPST NO (Contact Form A). Reed switch opens when magnet is
removed from proximity. Contacts are held closed when magnet is within
actuation range.
OPERATING TEMPERATURE: -40°F to 212°F (-40°C to 100°C). OPERATING
DISTANCE/ALIGNMENT: Operate (pull-in or make) points are nominal values with ±
10% tolerance. Release points are 110% to 150% of the operating points.
MECHANICAL & ELECTRICAL LIFE: 4 million operations. PACKAGING: Bulk packaging,
10 switch and magnet pairs per package.
Materials
HOUSING/SPACER/COVER: ABS plastic (UL94V-0), white. REED SWITCH: Rhodium
coated reed contacts in hermetically sealed, nitrogen filled glass capsule.
Closed when magnet is in close proximity. Used in closed loop circuits.
- WIRE LEADS : UL 1061/ UL1007 / UL2468
- All are 22 AWG wire: stranded, made of copper or
- aluminum; Length : 12 in. with ends stripped; Color: white. POTTING (around wires): Epoxy.
- MAGNETS: NdFeB
- ADHESIVE MOUNTING : Foam-backed, pressure-sensitive adhesive with release liner.
NOTE: Specifications and materials listed above are for switches with standard options. For information on specific and custom switches, consult Customer Service Center.
How To Order
| PART NUMBER | **SWITCH TYPE** |
|---|---|
| MPS45WGW | Subminiature surface mount (adhesive or flange), side exit |
leads, 1” make gap.
Actuating Positions
When installing recessed and surface mount contacts, magnet position is very
important. The switch and magnet must always be parallel or end to end, and
never in a ‘T’ configuration.
Gap Distance
Gap distance is a combination of the horizontal and vertical plane separation
of the switch and magnet. Example: if a recessed magnet is 1/4” off the
centerline of the switch, the make gap is reduced by 1/4”
Dimensions are shown: inches (mm) Specifications and dimensions
subject to change