Typical applications are automotive or home appliances. HC109 humidity sensors are positioned on the PCB at the same time as other SMD components and soldered using the reflow soldering method. Their small dimensions allow an easy and space saving design.
The humidity sensor HC109 shows the same advantages as HC1000 and HC101, such as high reproducibility of the sensor data and outstanding linearity over the whole humidity range. The temperature dependence is also highly reproducible and allows software temperature compensation. This means high accuracy over a wide temperature range, which is essential for instance to calculate dew point temperature
80 +/-12 pFNominal capacitance C0 (at 30°C)
100.8 +/-15.1 pFNominal capacitance C76 (at 30°C)
4.21 x 0.95 x 0.3 mmDimensions LxBxH
0.27pF / %RHSensitivity
0...100% RHWorking range humidity
-40...120°CWorking range temperature
< ± 1.5% RHLinearity error (0...98% RH)
Transmitter with "two-wires" technology receive the power from the process, and the signal is carry on return wire (closed current loop). With technology "three-wires" the power supply is separate from current output: 2 wires are the power supply and third carry the signal.