PIR H313S

General DescriptionThe RE 200B is a passive infrared sensor designed to pick up heat radiation of wave lengthsin a band around 10 microns. It contains two active elements configured as balanced diffe-rential series opposed type. This results in good compensation of environmental temperatureand excellent sensitivity for small changes of a spatial temperature pattern. Thermal signalsfar below one microwatt are sufficient to trigger a sufficient output voltage changeFunctional DescriptionIf the active elements of the PIR sensor are exposed to a change in the surroundingtemperature field, electrical charges are separated within the sensor elements. The voltageacross the sensors controls a J-FET source follower impedance converter and thusmodulates the output current of the PIR detectorThe spectral sensitivity of the sensor is controlled by the optical transfer characteristics ofthe window in the case and has been optimized to pick up radiation of the human bodyOperating ConditionsOperating Temperature -20 ˚C to +70˚CStorage Temperature -30˚C to +80˚COperating Voltage 3 to 10 V at Rs = 47 kΩ