Combined Indicators & Relief Valves


Combined Indicators & Relief Valves are designed for places with limited spaces, which only requires one hole to be fitted to equipment or container. As this indicator is reversible, the sensor paper will change from blue to pink when humidity increases, reverting to blue as humidity returns back to normal.

Desiccant cartridges are additional units, also known as static desiccators. These desiccators are optional tools which can fit most of our combined indicators & relief valves, adsorbing moisture entering the equipment during its use.

Streampeak offers our indicator and relief valve in 4 different models:

BLD9720/01-06 – ¾” Thread Humi-Valve

¾” Thread Humi-Valve is a lightweight, tamperproof and rugged valve, designed with a separate path to the humidity indicator. As corrosion-resistant material is applied to the valve, field maintenance is not required. The unit also features a manual release push button to allow users to open the containers with ease
The ¾” Thread Humi-Valve is packaged together with a washer, hex nut and gasket upon purchase.

BLD9404-M24 Thread Pressure Relief & Humidity Indicator Unit

Through incorporating a two-way breather valve and humidity indicator, this has resulted in the Humidity Indicator and Relief Valve having a separate and distinct setting for both pressure and vacuum relief. With only one hole required during installation, this makes the Humidity Indicator and Relief Valve ideal when space is limited.
It is designed for mounting in humidity-controlled enclosures subjected to air transportation and moisture-sensitive electronic equipment, to monitor and detect changes in the humidity of the space. The Combined Relief Valve & Indicator is irreversible, meaning that the colour of the sensor paper would change colour from blue to pink when humidity increases and revert to blue when the humidity returns to normal.
Static desiccators can be fitting along with a desiccant cartridge, to prevent moisture from entering the equipment during use.

BLD8555/01-05 – M24 Thread Pressure Relief & Humidity Indicator Unit

The M24 Thread Pressure Relief & Humidity Indicator Unit is a relief valve that can perform an additional function apart from monitoring humidity and relieving pressure. By installing a desiccator, this unit is capable of R.F screening continuity as well.

BLD1041 -Humidity Indicator Unit

A 1″ pressure relief & humidity indicator unit. Please contact us for more details on this product.


Click here to view other humidity indicators available.

Read an article about humidity indicator cards here.