With the 38-inch telescoping probe, a line of in-duct HVACR instruments — two psychrometers (SRH3 and ARH5) and a hot-wire anemometer (STA2) — makes it easier for techs to take temperature, percent rh, or air velocity readings in the duct. The standalone STA2 uses a hot wire for measuring air velocity.

Boasting a ±2 percent accuracy rating for air velocity, the Climomaster Series professional-grade hot-wire anemometer features smart probe technology. The technology allows a variety of probes to be used interchangeably with a single main unit.