Amprobe® Test Tools introduces the THWD-3, a relative humidity temperature reader that allows HVAC technicians to maintain optimal comfort levels for building occupants throughout the year. According to the company, the THWD-3 uses a precision capacitance sensor to deliver high-accuracy performance with long-term stability. The instrument measures the full range of relative humidity from 0-to-100 percent and features a wide ambient temperature measurement range from -20°C (-4°F) to 60°C (140°F).

Amprobe Test Tools, P. O. Box 9090, Everett, WA 98206; 877-267-7623;;