PTGD-AA08A is a series PTGD differential pressure piston-type gauge. It can be used to measure the pressure drop across filters, strainers, pump performance testing, and heat exchanger pressure drop monitoring. It's simple, rugged design possesses weather and corrosion-resistant gauge front with a shatter-resistant lens. The series PTGD contains a piston-sensing element that provides different differential pressure ranges with full-scale accuracies of ±2%. Typical applications include filter pressure drop, strainers, pump performance testing and heat exchanger pressure drop.