Detailed Product Description st.st CNG pressure gauge with sensor pressure gauge specification case diameter 2"st.st case with inner sensor range 400bar/psiScale face material: PC(Polycarbonate); Spring pipe material: Bronze (Qsn6. 5-0. 1), connection: Brass (HPb59-1), thread: G1/4(PF1/4), M14*1. 5, ZG1/4(PT1/4), NPT1/4; Power source: DC(12+-2v). Accuracy grade: 1.6,