Dwyer 477B [477B-1] Handheld Digital Manometer, 0 to 20.00 in w.c.

The Dwyer 477B1 Handheld Digital Manometer 0-20 in w.c. is a versatile, hand-held, battery operated manometer in the range of 0-20 in w.c. This model measures either positive, negative or differential pressures with ±0.10% of full scale accuracy. The user can select from up to seven common English and metric pressure units. A memory function allows storage of up to 40 readings for later recall and a display backlight provides auxiliary lighting for hard-to-see locations. Also standard are a hold feature, visual and audible overpressure alarms and an aluminum housing to protect the instrument against damage.