Beta DPC-300A is a rugged, dual-pressure system calibrator that uses plant air or an internal electric pump up to 300 psi (20 bar) for the calibration of gauges, P/I transmitters, controllers, switches and recorders. A built-in loop calibrator is accurate up to 0.015% reading and provides 24-VDC power. It has long-life, rechargeable NiMH batteries and an intuitive graphic panel.