VictorsHome Magnetic Reed Switch MC-31 NO Surface Mount Wired Door Window Contact Sensors with Cover for Home Security and Burglar Alarm Systems 5pcs

• MATERIAL - The switch housing is made of ABS flame retardant material and the reed switch is resistant to high temperature and deformation.
• NORMALLY OPEN(NO) - When the switch is separated from the magnet, the circuit is conductive(light on); When the switch is close to the magnet, the circuit is not conductive(light off).
• ACTUATION DISTANCE - 11-21mm transmitting distance. The contact has fast reflection and accurate detection.
• WORKING CONDITIONS - Load Current: 150mA; Maximum Voltage: 100V DC. The terminal has a detachable cover, which is more beautiful after installation.
• WIDE APPLICATIONS - Work with all access control and burglar alarm systems. Can be installed in wooden or aluminum alloy doors and windows.

Differences between NC, NO, NC/NO Normally Closed(NC): When the switch is close to the magnet, the circuit is conductive(light on); when the switch is separated from the magnet, the circuit is not conductive(light off). Normally Opened(NO): When the switch is separated from the magnet, the circuit is conductive(light on); When the switch is close to the magnet, the circuit is not conductive(light off). NC/NO Combined: The switch has 3 contact types: NC/NO/COM, you can choose to connect two of the contacts(NC-COM or NO-COM). PLEASE NOTE A magnetic door contact can only provide a switching signal to the device. It cannot directly load the power supply or be directly connected to the lamp. Specifications: Model: MC-31 Contact Type: NO Maximum Sensor Sensitivity: 16mm(+/-5mm) Load Current: 150mA Maximum Voltage: 100V DC Mounting Hole Distance: 52mm / 2.05inch Size(Approx.): 64 x 20 x 13mm / 2.52 x 0.79 x 0.51inch (L*W*H) 64 x 13 x 13mm / 2.52 x 0.51 x 0.51inch (L*W*H) Housing Material: ABS Package Content: 5pcs x Magnetic Door Switch 20pcs x Mounting Screws