The Rapid RH 4.0 Easy Reader System lets inspectors and contractors accurately record relative humidity readings on the job. Using Touch-n-Sense technology, it captures RH and temperature automatically on contact, testing each location within seconds. Following the reading, RH and temperature are displayed for five minutes or until another reading is taken, before turning itself off. With the system, each test hole contains a sensor that continually remains equilibrated requiring no additional equilibration time. Wagner Electronics. 800-634-9961.