Fixed sensor device for automatic monitoring of moisture content in building materials

摘要

A moisture detection sensor comprises a couple of conductive probes and, a water resistant enclosure 9 containing a micro controller unit 4 or equivalent logic circuit connected to the probes, a coin battery 7 and a colour LED 8. The sensor may be used in a building structure to detect moisture penetration and may include two fish hook nails 6 to secure the sensor in position. Alternatively the probes themselves may be hook shaped. The enclosure may be colour coded for use of the sensor with different materials and the controller may contain calibrated look up tables for the material types. Pre-calculated wake up periods may be used to extend battery life and a tamper proof spinning cap can aid against it being dislodged from its measurement location. The sensor may act as an automated alert system including a radio frequency transmitter.