Opening Detector for Steel Doors

Opening Detector for Steel Doors


The robust aluminium opening detector for steel doors is a magnetic contact for protecting large (garage) doors. Unauthorised opening is detected and reported to the alarm panel. This opening detector is ideal for fitting to steel and metal doors. Its special construction enables its use on these materials. The detector consists of a magnetic contact (reed) and a magnet. These are fitted parallel to each other. The electric circuit of this NC opening detector is normally closed (NC). If the distance between reed and magnet increases, the circuit is broken and an alarm reported. Its extremely robust aluminium housing protects it from damage even when driven over.

For safe and proper operation, this device must be installed and regularly maintained by a professional trained by us. Arrange regular maintenance appointments with your installer to ensure trouble-free operation in the long term with the latest security updates and new functions.

Product advantages

  • NC switching contact and tamper loop
  • 4-wire cable, 1.2 m
  • High switching distances, high wear resistance
  • Mountable on any material, particularly steel doors


General downloads:

Declarations of conformity:


We have summarised for you which disposal information is important in your country.

Disposal & labelling of packaging
Cable length: 1,2 m
Cable type: 4-core
Colour: other
Compatible with: Secoris, Secvest, Terxon
Connections: NC, max. contact capacity 200 V DC / AC / 1 A / 10 W
Dimensions: (WxHxD) 19x80x18 mm
External field protection: No
Height: 80 mm
Housing material: Aluminium
IP protection class: 65
Installation location: Setup, sensing distance to metal 14 mm, sensing distance to non-metal 21 mm
Installation type: Surface mounting
Length: 18 mm
Max. operating temperature: 55 °C
Sabotage monitoring: Yes
Sensor type: Reed contact
Type of detection: Magnetic field measurement
Width: 19 mm
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