E+E Elektronik - Process Instruments
Products include humidity sensors, CO2 sensors, moisture in oil, dew point, air velocity, flow and temperature sensors too.

"The EE35 Series is based on a functional, user-friendly housing concept and on the proven polymer humidity sensors of the HC Series. A specially developed autocalibration process enables measurements in a measurement range."
Dew Point Measurements - EE35 - E+E Elektronik
A specially developed autocalibration process enables measurements in a measurement range of -60...+60 degC Td with a Td measurement accuracy of ±2 degC.
Features Include
- Measuring range: -60...60 deg C Td - 0...60 deg C T
- Outputs: 0-5V, 0-10V, 0-20mA, 4-20mA
- Accuracy: +/- 2 deg C Td - +/-0.2 deg C T
- Supply: 24V AC/DC
Langwiesen 7, A-4209 Engerwitzdorf, Austria.