Michell Sensors Control Humidity Levels In Pools

The WM33 and WM261 relative humidity sensors from Michell Instruments can be used to keep swimming pools dry. The high levels of humidity caused by the water vapour and heat in indoor swimming pools can create a nightmare for facilities managers. Without effective dehumidification and ventilation systems to keep the air dry, indoor pools face attack from a host of humidity-related problems such as mould and corrosion - as well as complaints from visitors that it is uncomfortable.

Failure to keep control over levels of humidity may eventually cause structural damage as the warm air carries the moisture into the walls and ceiling. When combined with chlorine from the pool chemicals, the humid air becomes highly corrosive, attacking both metal and concrete. When controlling the humidity levels of the air in a pool room, the surface of the pool itself acts as a giant humidifier each time the dew point of the air falls below the temperature of the water. Without effective dehumidification systems, the air 'sucks' vapour from the surface of the pool to create just the humid atmosphere you want to avoid.

The WM33 and WM261 from Michell work as an integral part of a dehumidification system to help ensure that the surface temperature of the water remains lower than the air temperature and the relative humidity is kept at a constant 50 to 60 per cent. Both instruments work effectively with long-term exposure to the aggressive atmosphere created by the pool chemicals. Michell adds that the sensors are easy to recalibrate and maintain long-term accuracy and reliability.

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