HS315 Electric Vacuum Comparator adopts gas-gas push principle.the extra air sources give active power to pre-pressure for the whole calibrating system,perfectly instead of the heavy and complex hand work operation.
 
This instrument is easy to operate and very rapidly generate the required testing pressure, providing precise pressure control, only needs less than 5s to stabilize the pressure.Following the points above mentioned, It's main features is in saving both effort and time, which is very suitable to doheavy & repeat calibration works.