P3 International P0270 User Manual

Congratulations on your purchase of the P0270 Mold Alert! 

Mold is as old as the Earth and it’s everywhere. Under the right set of 

conditions, it can actually start to grow inside your home. Some types 

of mold even contain mycotoxins (toxins produced by fungus-type 

organisms) which can be hazardous to your health.

Mold can grow at humidity levels over 65%. If you keep the relative 

humidity in your home below 50%, mold growth can be inhibited. The 

Mold Alert Thermo-Hygrometer allows you to monitor some of the key 

factors in the home that can lead to mold, dust mites, and bacteria.

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Audible and Visual alarm function to indicate risk of mold

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Room Temperature

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Indoor Relative Air Humidity

●

Dew Point

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Maximum and Minimum values

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On/Off switch for audio alarm

Cold air absorbs little or no moisture. When this air enters living areas 

it becomes warmer and can then absorb much more water vapor. This 

interdependency of temperature and relative humidity is expressed by 

means of the dew-point.

If the measuring unit indicates an air temperature of 68°F and a 

relative humidity of 65%, then the dew-point temperature will be 56°F. 

What does this mean? That the air, in your bedroom for instance, will 

condense and form water droplets on surfaces that are cooler than 

56°F, and these damp areas may lead to mold.