Combined Relief Valves & Indicators


The Combined Relief Valve & Indicators only requires one hole to be fitted to equipment or container where space is limited. Made of humidity indicator and two-way breather valve, it has a separate and distinct function for both pressure and vacuum relief.

Designed for mounting in moisture-sensitive electronic equipment or any other humidity controlled enclosure, it can monitor and identify changes in the humidity of the space. As it is reversible, it can monitor and indicate the humidity level by changing the colour of the sensor paper when the humidity level rises and reverts to blue when the humidity returns to normal.

Static desiccators can be fitted with a desiccant cartridge to adsorb and remove the entry of moisture during usage.

Available in two different models:

  • M24 Thread Pressure Relief & Humidity Indicator Unit

A three in one function product, the M24 Thread Pressure Relief & Humidity Indicator Unit can not only relieve pressure and monitor humidity, but it can also perform R.F screening continuity through fitting a desiccator on the rear of the unit.

  • ¾” Thread Humi-Valve.

The ¾” Thread Humi-Valve is a tamperproof, lightweight and rugged breather valve, designed with a separate path to the humidity indicator. Field maintenance is not required as corrosion-resistant materials are applied through the valve. It also features a silicone rubber valve seal and a manual release push button on the valve to allow containers to be opened with ease.

A gasket, washer and hex nut is packaged along with the purchase of ¾” Thread Humi-Valve.

Key Features

Product Features

  • Changes from blue to pink when there is high humidity and goes back to blue when humidity decreases
  • A combination of M24 Thread Pressure Relief and Humidity Indicator Unit ¾” Thread Humi-Valve
  • Can be used to electrical equipment, storage areas, cameras and laser systems

Combined Relief Valves & Indicators Brochure