These pneumatic totalizers can be used as event, part or lot counters. The counters register pneumatic impulses on 4 through 8 digit displays. The standard version operates with impulse pressure between 25 and 100 PSI. The low pressure model operates between 7.5 and 30 PSI. A variety of mounting options include panel mount with screws, panel mount with spring clip, rear mount with stud or base mount. The counters are available in either resettable or non resettable versions.