E-M-DCS3: ENVIROMUX door-contact sensor 

Monitors access with a magnetic bridge sensor, which responds to any magnetic material (no special inserts necessary). Can also be used for monitoring side wall and covers.

• Includes mounting hardware
• For normally closed circuit connection
• Screw terminal
• Connect to digital input or RJ45 sensor port on an ENVIROMUX system
• Compatible with ENVIROMUX 2D/5D/16D; Mini; Micro; 1W