The new Interstage pressure checker from Narked at 90 is precision instrument in a tough housing for everyday use. It has a pressure range of 0-15bar (0-220psi, 0-1.5Mpa). The Interstage pressure checker can easily be switched between Bar, PSI and megapascals and also a zero function built in. Ideal for servicing technicians, the purge button allows changes in interstage pressure to be made without depressurising the regulators. Perfect for rebreather divers and technical divers to check their interstage pressure with a higher degree of accuracy. It is available with a calibration certificate if required. The instrument has a user setable auto-power off to save the battery which has over 2000 hours life.