Dwyer德威尔 美国正品进口压力计 477B-3 477B-7/2/1 数字差压计

Dwyer德威尔 美国正品进口压力计 477B-3 477B-7/2/1 数字差压计
测量正压、负压和差压
九种可互换的英制和公制单位
存储40个读数在存储器中方便以后参考
过压时声光报警
The SERIES 477B Handheld Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges from 0-20 in w.c. up to 100 psi. All models measure either positive, negative or differential pressures with ±0.10% of full scale accuracy. You can select from up to seven common English and metric pressure units so conversions are not necessary. A memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Also standard are a hold feature plus both visual and audible overpressure alarms.