Learning Center

Plain-language explanations of the measurements, sensors and numbers behind environmental monitoring.

A sensor with a clock and a memory. It turns a reading into a record you can prove.

Glass is the coldest surface in the room, and it is below the dew point of the air you are breathing.

A sensor for flammable gas, reported against the concentration that could burn. Sniffers find leaks; monitors guard spaces.

The temperature at which the air's moisture condenses. Colder surfaces than this get wet.

How full the air is of water vapor, as a percentage of what it could hold at that temperature.

The water in the air barely changes; the temperature does, and relative humidity follows it.

The 24-hour number tells you what is happening now. The 90-day number tells you your risk.

A radioactive gas from the ground, the second leading cause of lung cancer, and invisible to every sense.

The one VOC with its own guideline, its own sensor and a habit of coming from your furniture.

Solvents evaporate for hours; some coatings off-gas for weeks. The monitor shows the whole curve.

VOC is a family of chemicals. TVOC is a sensor's guess at their sum. Neither is a specific measurement.

Total volatile organic compounds: one number for hundreds of chemicals, from one sensor that cannot tell them apart.