Electronic, fully digital PID control incorporating a microprocessor ensures exact regulation of the humidity. The humidifier uses the principle of an electrically heated evaporation basin including automatic water refill. The relative humidity is measured by means of a capacitive sensor.

- Humidity range : up to 85% r.H. (in the range of  25...55°C)
- Humidity accuracy : +/- 2% r.H. (at place of sensor)
- Humidity display : +/- 1% r.H. , digital
- Humidity control : PID, digital
- Humidity sensor : capacitive system
- Water level: float switch
- Control of water level: valve
- Water supply: max. 1 bar = 100 kPa

Door heaters
Condensation at high humidity and incubation temperature above ambient can be avoided by heating the door frames and windows. The heating is controlled fully automatic so that no condensation is allowed to occur.

Calibration of the humidity controller
This calibration will be an easy matter by using:
- Calibration device
- Humidity standards (Lithium-Chloride solutions)
- Shaker serial interface and personal computer with ‘ISIS’-software installed.
The system is checked by producing a known humidity in a small chamber which is mounted onto the sensor element. Unsaturated Lithium-Chloride solutions are used as humidity standards. Different solutions are available to produce different humidity's. A calibration report will be printed on request.