M sensor
Self-powered Door Open/Close Detection Sensor
A power-free door sensor that sends a signal from the force of the door opening and closing
It converts the kinetic energy produced when a door opens and closes into electricity and sends a signal distinguishing open from closed. Depending on the mounting and operating method, it comes in Built-in (recessed), Add-on (surface-mounted) and Lever types.
- PowerSelf-powered (no battery)
- Dust · water protectionIP57
- Transmission rangeapprox. 100 m (open field)
- Durability100,000-cycle operation test
- Inactivity detection24 · 48 · 72 hours (Sensor Hub)
01How it works
- Door opens / closes
When the door opens or closes, this is transferred to the sensing element.
- Self-powered generation
Kinetic energy is converted into electrical energy.
- Open · closed signal
The status is distinguished and sent as an RF signal.
- PC · text alerts
Open / close history monitoring and text message alerts
02Features
Installation is complete once it is attached where you want it.
A compact module handles sliding and swing doors, windows, drawers and even vehicle doors.
Also used on outdoor entrances.
More than 100,000 operations and signal transmissions verified with a durability tester.
Used for access records at unmanned facilities and inactivity detection.
03Types
Recessed inside the locking device to detect when the door closes or opens. Used on sliding and swing doors and valuables drawers.
Attached to the outside of the door to detect the opening and closing of swing doors.
Installed inside the door, it detects the opening and closing of various doors through lever action. The lever bridges the gap at the door edge.
We also hold patents for a Slide type inserted in the seat belt buckle to detect clip insertion (vehicle seat belt fastening detection) and for vehicle door open/close detection.
04System configuration
Door Open/Close Detection Sensor — Built-in (recessed) typeMWSD-100
RepeaterMWSR2-900 · Optional
Signal MonitorMWSM-700
Sensor HubMWSH-300
PC monitoringSensor location · detection history
Text alertsManager's mobile phoneRanges are based on open field with no obstacles. Each added repeater extends the range by approx. 1 km.
05Specifications
Door Open/Close Detection Sensor — Built-in (recessed) type
Model MWSD-100
| Size | W32 × D67 × H16 mm |
|---|---|
| Weight | 35 g |
| Frequency | 920.700 MHz (FSK) |
| Transmission range | approx. 100 m (open field) |
| Power | Self-powered (no battery) |
| Dust · water protection | IP57 |
| Application | Sliding · swing doors |
Door Open/Close Detection Sensor — Add-on (surface-mounted) type
Model MWSD-110
| Size | W28 × D72 × H27 mm |
|---|---|
| Weight | 37 g |
| Frequency | 920.700 MHz (FSK) |
| Transmission range | approx. 100 m (open field) |
| Power | Self-powered (no battery) |
| Dust · water protection | IP57 |
| Application | Swing doors |
Door Open/Close Detection Sensor — Lever type
Model MWSD-130
| Size | W29 × D74 × H42.5 mm |
|---|---|
| Weight | 49 g |
| Frequency | 920.700 MHz (FSK) |
| Transmission range | approx. 100 m (open field) |
| Power | Self-powered (no battery) |
| Dust · water protection | IP57 |
| Application | Swing doors |
Receiving · monitoring devices used together
Repeater
Model MWSR2-900
| Size | W115 × D115 × H30 mm |
|---|---|
| Weight | 167 g |
| Frequency | 920.7 / 447.9 MHz (FSK) |
| Antenna | External antenna × 2 |
| Tx/Rx range | approx. 1 km (open field) |
| Range extension | +approx. 1 km (open field) |
| Display | FND 3-digit, LED (Rx · Tx · Power) |
| Power | DC 12 V 1 A adapter |
Signal Monitor
Model MWSM-700
| Size | W258 × D107 × H34 mm |
|---|---|
| Weight | 497 g |
| Frequency | 920.7 / 447.9 MHz (FSK) |
| Antenna | External antenna × 2 |
| Reception range | approx. 1 km (open field) |
| ID registration | max. 999 |
| Signal storage | Up to 10 overlapping signals |
| Display | FND 5-digit LED |
| External terminals | RS-485, beacon light, speaker, power |
| Power | DC 12 V 1 A adapter |
Sensor Hub
Model MWSH-300
| Size | W100 × D100 × H26 mm |
|---|---|
| Weight | 145 g |
| Frequency | 920.7 / 447.9 MHz (FSK) / Wi-Fi |
| Antenna | External antenna × 2, Internal antenna × 1 |
| Reception range | approx. 1 km (open field) |
| Recipient numbers | max. 5 |
| Display | FND 4-digit, Power · Rx · Tx LED |
| External terminals | Power, TCP/IP, LAN (RS485) |
| Power | DC 9 V 1 A adapter |
Specifications are subject to change without notice for performance improvement.
06Applications
Installed on various doors to record entry
Places requiring authorized access, such as unmanned substations and power plants
Integrated safety management with valve · fire sensors and emergency bells
Open/close detection without a wire harness
Care through activity / inactivity detection
Installation sites
Field installation photos6
Applicable platforms
A system that receives signals from all sensors in a space (emergency · lights · fire · security) and sends text messages over the internet to registered numbers
Distribution Panel Power Safety PlatformA disaster monitoring system that monitors emergency, fire and door information in extra-high-voltage switchgear using self-powered sensors
GIS Substation Power Safety PlatformA system that mounts self-powered sensors on gas valves to show GIS valve open/close status on an LCD panel and sends the status to SCADA to prevent mis-operation
07Certifications · patents
KC Conformity Registration — Door Open/Close Detection SensorR-R-M1p-MWSD-100 · 2022-09-28
FCC — Door Detection SensorFCC ID 2BTDM-MWSD-130 · 2026
IECEx international explosion-proof certification (intrinsic safety)IECEx ICR 24.0005X · 2024-09-10
Self-powered door open/close detection monitoring systemRegistered (Korea)
Self-powered vehicle seat belt fastening detection monitoring systemRegistered (Korea)
Self-powered vehicle door open/close detection monitoring systemRegistered (Korea)
09FAQ
QWhich type should we choose?
Built-in type if it can go inside the locking device, Add-on type if it is attached to the outside of the door, and Lever type if the door gap is uneven. Send us a photo of the door and we will choose for you.
QWill it alert us if a door has not opened for a long time?
If the door sensor is registered as an activity detection sensor on the Sensor Hub, a text message is sent to the registered numbers when there has been no operation for 24 · 48 · 72 hours.
QCan it be used on switchboard doors?
It is applied to GIS substation PLC panel doors and extra-high-voltage switchgear doors to raise an alarm if a live equipment panel is opened during outage work.
CONTACT MPIA
Self-powered Door Open/Close Detection Sensor
A power-free door sensor that sends a signal from the force of the door opening and closing