The AP1000 Series Digital Tachometer is a complete rate monitoring system that combines accuracy and reliability in a rugged, compact housing. The AP1000 can take a variety of pulse inputs. The meter translates the input pulses to display RPM, or any specified user unit such as feet-per-minute, parts-per-hour, or gallons-per-minute. Standard input power is 115 VAC; 230 VAC and 12 or 24 VAC / VDC are optional.