TH-3 Relative Humidity & Temperature Meter (0–100% RH, Duct Probe)

The Amprobe TH-3 uses a precision capacitive sensor to deliver accurate readings with long-term stability. It measures the full relative-humidity range from 0% to 100% and an exceptionally wide ambient temperature range from -4 °F to 140 °F.

The sensor is mounted on a long shaft extending from the top of the unit, making it easy to probe duct work and hard-to-reach areas. The large LCD shows two measurements at once with hold, min, max, and relative options. The TH-3 ships with a soft carrying case, sensor cover, battery, and manual.

Key Features

• Dual display of relative humidity and temperature
• Full 0–100% RH range; -4 °F to 140 °F ambient
• Extended probe stem reaches into air ducts
• Relative mode monitors humidity and temperature changes
• Min/max readings and data hold
• Capacitive sensor with protective cover; auto power-off
• Includes soft case, sensor cover, battery, and manual

The Amprobe TH-3 Relative Humidity & Temperature Meter (0–100% RH, Duct Probe) # TH-3 is manufactured by Amprobe. Valley Instrument Service is an authorized Amprobe dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.