Opening Detector, 4m, 4-core, external field protection (white)

Opening Detector, 4m, 4-core, external field protection (white)


The opening detector is a magnetic contact for protecting doors and windows. Unauthorised opening is detected and reported to the alarm center. The opening detector consists of a magnetic contact (reed) and a magnet. These are fitted parallel, in front of, or at right angles to each other at a minimum distance of 8 mm apart. The electric circuit of this NC opening detector is closed in normal state (NC). If the distance between reed and magnet increases, the circuit is broken and an alarm reported. The detector is tamper-protected and stray-field protected. Stray-field protection means that only the magnet belonging to this opening detector has the right field strength to keep the electric circuit closed. Any change to the field strength (e.g.: by another magnet) breaks the circuit and an alarm is triggered. The optimum installation location is the middle of the door or window frame. It can also be fitted to the bottom of the window frame if a particular window with a magnetic contact is to be tilted open. The detector is suitable for both flush and surface-mounted installation. It is water-resistant and dustproof (IP 68). The opening detector is VdS certified and available in white and brown.

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.

Opening detector, 4m, 4-core, external field protection, white
Awards & Partners
VdS certificate
As a company in the German Insurance Association (GDV), the VdS damage prevention center is the independent certification center for security technology. With its strict certification guidelines, the VdS ensures products, which guarantee security.
Awards & Partners

Product advantages

  • For reliable perimeter security
  • Protected against external fields
  • For securing doors and windows
  • Spacing of magnetic switch to magnet: 5 to 12 mm



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

Disposal & labelling of packaging
Cable length: 4 m
Cable type: 4-core
Certifications: VdS-C, EN 50131 Grade 3, VSÖ GS-H
Colour: white
Compatible with: Secoris, Secvest, Terxon
Connections: NC, max. contact capacity 24 V DC / AC / 0.2 A / 4.8 W
Dimensions: (WxHxD) 11x12x48 mm
EN: Grade 3
External field protection: Yes
Height: 12 mm
Housing material: ABS
IP protection class: 68
Installation location: Integration / surface mounting
Installation type: Surface mounting/recessed mounting
Length: 48 mm
Max. operating temperature: 70 °C
Sabotage monitoring: Yes
Sensor type: Reed contact
Type of detection: Magnetic field measurement
VdS class: C
Width: 11 mm
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