New Heat Shock Compensating Thermopile Sensor – HMS P-Series

Heimann Sensor introduces a new generation of single element thermopile sensors with optimized thermal heat shock behavior. The new HMS P-Series allows fast and accurate measurements even under rapidly changing ambient temperatures or so-called heat shock situations.

Heat shock situations typically occur when the sensor is quickly moved from one ambient temperature to another as it is the case with in-ear thermometers. Once the thermometer is inserted into the ear opening, the sensor temperature is exposed to a different temperature. As thermopiles compare incoming radiation (temperature) with a reference temperature (sensor), a quickly changing sensor temperature will result in inaccurate readouts until the sensor reference temperature is stable again.

Our new HMS P-Series possesses an improved thermal heat shock behavior thanks to its design. A higher thermal mass of the sensor housing combined with materials of high thermal conductivity and a filter integration make up the success factors.

The heat shock response is improved by factor 5 compared to a standard TO-package which is shown in the following graph. This allows accurate readings within 0.2 seconds after a heat shock occurred, whereas a standard sensor needs 1 to 2 seconds until its readout is accurate again. This presents a huge improvement for in-ear thermometer devices regarding speed and comfort of in-ear temperature measurements.

For more information visit: www.heimannsensor.com/HMS-P-Series