HPT Pressure Transducer & HDD Digital DisplayPressure readings in bar and psi 0. 5% full scale accuracy Maximum working pressure 10,000 psi Pressure Transducer (HPT1) For precise measurement of system pressure up to 10,000 psi. Supplied complete with a 6. 5 foot connecting cable. Output 4 20 mA. Digital Display Unit (HDD1) For use with HPT1 transducer to record pressure in applications where remote reading is preferred. Compact size with large LCD screen. Displays readings in psi or bar.