The EWHS 280 humidity sensor is a probe designed to be connected to a humidity measuring device. Output signal is a current signal (4...20 mA).
The humidity sensors of the EWHS 300/310 series are designed to be connected to high-accuracy humidity and humidity/temperature measuring de-vices. The EWHS 300 is a humidity measuring device (output signal 4...20 mA) while the EWHS 310 is a humidity and temperature measuring device (two 0...20 mA outputs).