TSI's TH-CALC Meters are excellent hand-held diagnostic instruments for measuring temperature and humidity. The Model 8720 measures temperature and humidity, and also calculates dew point. The Model 8722 adds data logging, and performs wet bulb temperature, absolute humidity, humidity ratio and % outside air calculations. TH-CALC Meters are ideal for conducting thermal comfort studies and Indoor Air Quality (IAQ) evaluations.

Temperature
Range 0 to 60°C (32 to 140°F)
Accuracy1 1 0.6°C (±1.0°F)
Resolution 0.1°C (0.1°F)
Humidity
Range 5 to 95% RH
Accuracy2 ±3% RH
Resolution 0.1% RH
Instrument Temperature Range
Operating (Electronics)
5 to 45°C (40 to 113°F)
Operating (Probe) -10 to 60°C (14 to 140°F)
Storage 20 to 60°C (-4 to 140°F)
Data Storage Capabilities (7425 only)
Range 12,700+ samples and 100 test IDs
Logging Interval (7425 only)
1 second to 1 hour
Time Constant (7425 only)
User selectable
External Meter Dimensions
8.4 cm x 17.8 cm x 4.4 cm (3.3 in. x 7.0 in. x 1.8 in.)