Pressure Gauge BOTTOM MOUNT - STAINLESS STEEL - LIQUID GLYCERINE Filled 1/4" 100psi 2" Water Well Tank STEEL PRESSURE GAUGE - General Purpose - not for use with oxygen, ideal for use where vibration or pressure pulsation occurs. ACCURATE - Accuracy: 3% - 2% - 3% Grade B. DURABLE - Stainless steel internals and connection, polycarbonate window. OPERATING TEMPERATURE - Ambient Operating Temperature: -40 to 140F (-40 to 60C). STEEL CASING - 304 Stainless Steel Case w/ vent plug, glycerine filled.