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Remote Sensor

The Remote Sensor Unit was designed for one of our clients for use in the telecommunications industry. It is a sensor unit designed for use with our clients other communications equipment. The sensor has been fitted in many hospitals, care-homes and flat complexes.

The unit was designed for battery operation, with a long battery life being critical. The quiescent current of our design is 0.4uA, giving a battery life of at least five years in normal use!

The unit includes a circuit to monitor battery condition. When the battery is found to be nearly depleted (dictated by a threshold set within the software), the unit signals to its corresponding control hub equipment to indicate battery low status.

Switching the sensor can be achieved through the use of an integral reed-switch, or through the use of switching contacts that connect to external devices. The unit can be configured for normally open or normally closed switching contact conditions. An 869 MHz radio message is generated and transmitted every time the units switching status is changed.

The unit can send a variety of radio messages indicating various conditions (high temperature, nurse call button pressed etc.). The radio message sent by the unit is dictated by the configuration of a DIL switch on the rear of the unit.

The remote sensor is housed in a small enclosure measuring 7.5 x 5 cm

Please take a look at the photos of the unit on the right...