The Miljoco Contractor's gauge is attractively priced and meets or exceeds the industry accepted standard for the commercial HVAC and building trades. This instrument features a stainless steel case and ring, and uses high-temperature solder joints on the tube and socket, allowing it to be used on process fluids up to 200 degree F. It is well-suited for service on air, water, glycol solutions, and gas. Connection: 1/4" NPT bottom outlet. Accuracy: +/-1 percent full scale (ASME B40.100 Grade 1A). Process temperature: -40 to 200 degree F (-40 to 93 degree C). Ambient temperature: -40 to 140 degree F (-40 to 60 degree C). 4-1/2" Dial - flangeless case.