The PV624 is capable of automatically generating low differential
pressures. When combined with a multifunction calibrator from the
DPI620GENii family and a PM620LP Low Pressure Module, you have a
portable low pressure calibration system. Choose from full scale ranges
of ±2.5 mbar (1 inH2O), ±10 mbar (5 inH20), or ±25 mbar (1 to 10 inH2O),
with total uncertainty from 0.05% span.