A thermohygrometer measures air temperature and relative humidity, supporting comfort, HVAC, storage, industry, greenhouses, and weather monitoring. Mechanical models offer simple battery-free operation, while electronic versions add faster responses, displays, alerts, logging, and remote access. Choosing accurate, durable equipment and ensuring proper placement, maintenance, and calibration ultimately delivers reliable readings.

A humidity tester measures moisture in air, helping detect conditions linked to mold, corrosion, static electricity, discomfort, and material damage. Analog models use humidity-sensitive materials, while digital versions rely on electronic sensors. Accurate readings, considered alongside temperature, support informed ventilation, humidification, dehumidification, calibration, placement, and maintenance decisions across diverse environments.