This product is a H290 Humidity Transmitter Instruction Manual
This manual provides instructions for operating, installing, and maintaining the ROTRONIC H290 humidity transmitter. It details power supply options, output signals, temperature and humidity limits, and sensor protection. Installation guidelines cover mechanical mounting, probe positioning, and calibration port setup. Maintenance includes cleaning or replacing the dust filter and periodic calibration checks.
Calibration procedures are described for both one-point and full calibration, using a PFC150 calibrator. The H290 features a capacitive humidity sensor with temperature compensation and can be ordered with 4–20 mA or 0–5 V output. It is designed for OEM applications and includes a built-in RTD temperature sensor for accurate measurements.
| Power Supply | 10–35 VDC or 24 VAC |
|---|---|
| Output Signal | 4–20 mA or 0–5 V |
| Temperature Operating Range | -5 to 320°F (-20 to 160°C) at probe |
| Humidity Limits | 100%RH up to 185°F (85°C), 90%RH at 212°F (100°C), 60%RH at 260°F (125°C), 25%RH at 320°F (160°C) |
| Sensor Protection | PPS slotted cap with stainless steel wire mesh insert |
The H290 can operate with an unregulated supply voltage between 10 and 35 VDC or with 24 VAC.
The H290 can be ordered with either a 4–20 mA current output or a 0–5 V voltage output.
The H290 was designed to operate within -5 to 320°F (-20 to 160°C) at the probe.
Install the probe so that it is immersed in the environment to be measured, with a minimum immersion depth of 9 to 9.5 inches, and ensure good air movement at the probe.