Door/Window Sensor With External Contact Input, 319.5MHz.
The TX-E231 Door/Window Sensor with External Contact Input from Interlogix is a compact, low profile sensor that provides intrusion detection for application in homes and small businesses. This sensor allows flexibility in installation with the use of an external hardwired contact, which can be used in areas where the sensor cannot be mounted near the magnet. With both white and brown covers the TX-E231 Door/Window Sensor with External Contact Input can easily be installed on doors, windows, cabinets or other items that can be opened and closed. This sensor also contains a replaceable lithium battery that lasts up to five years under normal usage.