Door/Window Sensor Milesight WS301-915M White

The Milesight WS301-915M White is a compact door and window sensor designed for monitoring the open/closed status of access points in residential and commercial security systems. It supports reliable detection within typical indoor environments, operating across a temperature range of -20 to 60 °C and tolerating relative humidity up to 90%. Its small footprint (50.5 mm x 31 mm x 18.5 mm) allows unobtrusive installation on frames and sashes while maintaining accurate status reporting to compatible control systems.

Advantages

The sensor combines a slim housing with simple mounting to minimise visual impact while providing consistent detection of door and window position changes. Its operating temperature and humidity ranges make it suitable for a variety of indoor locations. The device is engineered to integrate with standard security and control systems, offering dependable performance for routine monitoring tasks.

Suitable for

• Monitoring entry doors and internal room doors
• Securing windows and sliding patio doors
• Integration with alarm panels and building automation systems
• Use in homes, offices, retail premises and light industrial spaces

Key specifications

• Operating temperature: -20 to 60 °C
• Relative humidity tolerance: 0 to 90% (non-condensing)
• Dimensions: 50.5 mm × 31 mm × 18.5 mm
• Colour: White
• Function: Open/closed status detection for doors and windows

How to use

Place the sensor body on the fixed frame and the magnet on the moving sash or door so that the two parts align when the door or window is closed. Follow the manufacturer's integration instructions to pair the sensor with the control panel or gateway used in your security setup. After installation, verify correct alignment and signal transmission by opening and closing the door or window and observing the status updates in the connected system.

Recommendations

Install the sensor on a clean, dry surface and avoid mounting across uneven gaps. Keep the device away from direct water exposure and strong electromagnetic sources. Periodically check alignment and test status reporting as part of routine system maintenance to ensure continued reliable operation.