November 2026
MCT-43 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems
A 433 MHz wireless magnetic contact sensor for doors and windows, to be used with a GSM based wireless security alarm system. It has no siren and cannot work on its own.
Specifications
| Frequency | 433 MHz |
|---|---|
| Colour | White |
| Type | Wireless magnetic door and window sensor, non-standalone |
| Siren | None built in |
| Antenna | Built-in omnidirectional antenna |
| Low battery | Light flashes continuously to remind you to change batteries |
| Installation | Peel and stick |
| Works with | GSM based wireless security alarm system |
Frequently asked questions
No. It does not have any alarm or siren built in, so it needs a GSM based wireless security alarm system.
433 MHz.
It is peel and stick, so you can fix it on the door or window and frame without drilling.
The sensor flashes its light all the time when the voltage is low, as a reminder to change the batteries.
Yes. It has a built-in omnidirectional antenna.
Yes. It comes in NavKar siren kits such as the SRSOL-43 and SRRD-43 kits with 2 remotes.
Sensors on doors, windows and rooms send a radio signal to the alarm panel. The panel sounds a loud siren and, on Wi-Fi or GSM models, sends phone alerts.
Yes. Wireless sensors, remotes and panic buttons from the same frequency can be paired with the panel. The number of zones is listed in the product details.
GSM models use a SIM card to call or send SMS even without Wi-Fi. Wi-Fi models need working internet for app alerts.
Yes. Free technical support is available for installation and setup.