The Testo 0560 0610 Pocket Pro Air Moisture and Temperature Measuring RH Meter has a pocket-sized design for one-handed operation with a temperature measurement range of 14 to 122 degrees F and accuracy of + or - 0.9 degrees F, and a humidity range of 0 to 100% relative humidity (RH) and accuracy of + or - 2.5% RH over 5 to 95% RH, and can be used to check indoor air quality in offices, production rooms, and warehouses. This meter simultaneously measures humidity and temperature and includes wet bulb and dew point calculation. It has max./min. values and a hold function as well as a backlit LCD, which provides readability in low-light conditions. The meter uses 2 AAA batteries (included) with a battery life of approximately 200 hours without backlight, and includes a wrist strap, belt case, and protective cap for storage. The meter measures 119 x 46 x 25 mm (H x W x D) (including protective cap). (H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.)
Hygrometers measure the moisture content, or humidity, in the environment, either as relative humidity (percentage of moisture in the air) or as absolute humidity (amount of moisture in the air). Some hygrometers can also measure temperature, dew point, and pressure. Handheld hygrometers are compact devices that use attached probes to take measurements and have a digital screen to report measurements. Other hygrometers utilize transmitters to send measurements from probes placed in ducts or outside environments to an output device; one example of this type is a weather forecasting hygrometer. Hygrometers are used in laboratories, storage areas, greenhouses, saunas, humidors, industrial and residential settings, and museums. Hygrometers can form part of devices called humidistats to help control humidifiers or dehumidifiers to regulate the humidity of the air.
Testo manufactures portable test and measurement instruments. The company, founded in 1957 in Germany, has a U.S. office in Sparta, NJ, and meets International Organization for Standardization (ISO) standard 9001.