Hygrothermograph

So economical, you’ll want several for monitoring and recording environmental conditions This hygrothermograph is so compact it fits almost anywhere- measures just 6.125"L x 7.5"H x 4"D. Quartz-controlled drive is employed for accuracy; operates for six months on one AA…

Maintain temperature and humidity records for buildings or controlled environment chambers. Use one-day rotation for detailed views of troubled areas, longer rotation times for routine records. A flashing LED indicates drum is rotating. Two size C batteries provide up to six months of…

Spring wound- no batteries required! Made of corrosion- resistant acrylic for indoor or sheltered outdoor use. Spring winding keeps chart running for eight days. Even when the motor begins to run down, a steady chart speed is maintained. Includes one 1-day gear and one 7-day gear, two…