Humidity controller Rittal SK 3118.000 hygrostat adjustable humidity control

Rittal SK 3118.000 hygrostat adjustable humidity control is a compact electromechanical controller intended for monitoring and controlling relative humidity inside electrical enclosures and technical rooms. It allows manual setting of the desired humidity switch point and actuates ventilation, heating or dehumidifying devices to maintain target conditions. The unit is designed for straightforward installation in industrial and commercial environments where consistent humidity control helps protect sensitive equipment and prevent condensation-related faults.

Advantages

The hygrostat provides simple, reliable on/off switching based on relative humidity with a clear adjustable setpoint, enabling targeted control of fans, heaters or dehumidifiers. Its compact construction and mounting options make it suitable for enclosure integration. The device requires no complex programming, offering low-maintenance operation and straightforward mechanical adjustment. Built for robustness in technical spaces, it contributes to extended service life of electrical components by reducing moisture-related degradation.

Suitable for

Key specifications

How to use

Install the hygrostat inside the enclosure or technical space where monitoring is required, following standard electrical safety and mounting practices. Connect the switching contacts to the controlled device(s) such as a fan, heater or dehumidifier according to wiring diagrams supplied by the system integrator or installer. Adjust the humidity setpoint manually to the desired relative humidity level at which the controller should actuate the connected equipment. Periodically inspect the unit and surrounding area for dust or contamination that could affect sensor response, and verify switching operation during maintenance checks.

Recommendations

Place the hygrostat in a representative location within the enclosure, avoiding direct drafts from vents or heating elements. Select a setpoint that balances protection from condensation with acceptable ambient levels for installed equipment. For critical applications, combine the hygrostat with additional environmental monitoring or fail-safe measures to ensure continued protection in case of device or power failure.