Door Opening Detector, 2 m, 4-core (Art. no. MK4000)

  • Magnetic contact for installation and assembly
  • NC switching contact
  • 2 m cable / 4-wire

Door Opening Detector, 2 m, 4-core (Art. no. MK4000)

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

The door opening detector is a magnetic contact for protecting large (garage) doors. Unauthorised opening is detected and reported to the alarm panel. The door opening detector is mounted chiefly on roll-up, sliding, and up-and-over doors. 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. The detector is tamper-protected. The best installation location is in the middle of the entrance. The magnetic contact is mounted on the ground and the magnet on the inside of the door at a distance of about 20 mm. The door opening detector is perfectly suited for surface-fitting. It is absolutely water and dust-proof (IP 68). Its extremely robust aluminium housing protects it from damage even when driven over.

Art. no.: MK4000
Dimensions: (WxHxD) 180x14x45 mm
Connections: NC, max. contact capacity 60 V DC/AC/1 A/10 W
Width: 13 mm
Type of detection: Magnetic field measurement
Stray-field protection:
Housing material: Aluminium
Height: 230 mm
Cable type: 4-core
Cable length: 2 m
Length: 45 mm
Max. operating temperature: 50 °C
Installation location: Setup, optimal triggering clearance 20 mm
Tamper monitoring:
IP protection class: 65
Sensor type: Reed contact

Scope of delivery:

  • 1x Gate opening detector
  • 1x Connecting cable, 2 m

General Downloads:


Opening detectors

Seamless protection of the external shell is the cornerstone of every electronic home security system. The opening detectors of the Terxon wired alarm system secure doors and windows. Surface-mounted and flush-mounted versions are available for installation depending on requirements. ...
Other interesting products from the category Opening detectors

Questions & answers

Security glossary