Indicators designed for wide applicability across industry

Alfasensor’s indicators are used today to detect potential humidity problems or to confirm that a moisture barrier is providing proper protection.

Humidity in buildings: Humidity problems in buildings are generally due to changing seasons and mainly affect unheated areas such as crawl spaces, attics, lofts and cold storage rooms. Indicators that show when the relative humidity exceeds 75% are used in spaces like these. This is the level at which bacteria, mould and other micro-organisms start to thrive.

Transport and storage: Alfasensor’s indicators are used to assure that protective packaging and moisture barriers are providing full protection for goods in transit and storage. Indicators that show a reading when the relative humidity has exceeded a level of 60% are used wherever there is any risk of corrosion. Indicators that react at 75% and 85% relative humidity respectively are used when material that needs protecting from mould and other micro-organisms is at risk of exposure, for example when being transported in containers.

Humidity indicators with time display

There are many ways to get an on-the-spot account of the relative atmospheric humidity. However, there are fewer ways of easily measuring the relative humidity over a period of time, i.e. how long something has been exposed to humidity above a certain level.

Alfasensor’s indicators, which are based on a physical-chemical principle, show how long the relative humidity has exceeded a predetermined level. The reading on the indicator is non-reversible. This means that even if the relative humidity temporarily falls below the humidity level, the maximum humidity reading remains unchanged.

Alfasensor’s indicators have a robust design that assures high reliability. The size of the indicator is slightly smaller than that of a normal business card. The indicator’s humidity sensing element is on a selfadhesive label, which makes it simple to affix the indicator to any surface where you want to measure the humidity conditions. The indicators are easy to read and understand, as the length of the reading is proportional to the time that exposure to humidity has exceeded the predetermined level.

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