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Comp II LED
Comp II
SCX Black
SCX Silver
SCX White
60s Muscle
MINI Factory Match
Liquid Filled
Non-Filled Direct Mount
Engine Thermometers
Accessories
All Gauges
1" Dial (K)
1½" Dial (A)
2¼" Dial (B)
3" Dial (E)
3" Asphalt (E)
3" Bottom Mount (J)
3" Asphalt (J)
3" Adjustable (ADJ3)
5" Dial (G)
5" Adjustable (ADJ5)
5" Bottom Mount (GJ)
Engine Thermometers
Capillary
Industrial
All Thermometers
Utility, Lower Mount
SS/Brass, Lower Mount
SS/Brass, Center Back
SS/Brass, U-Clamp
SS/Brass, Panel Mount
All SS, Lower Mount
All SS, Panel Mount
4" All SS
4.5" Process Gauges
2" All SS (Q3)
2½" All SS (K)
2½" SS/Brass (J)
4" All SS (G)
4½" Process (MPB/SC)
6" All SS (H)
All McDaniel Gauges
General Service
Severe Service 63mm
Severe Service 100mm
Diaphragm Gauges
Process Gauges
All MARSH Gauges
MARSH PDF Catalog
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What is proof pressure? ASME B40.100 Bourdon Tube Proof Pressure Definition Proof pressure (often times called over pressure) is the maximum pressure a gauge can withstand without evidence of change in accuracy. Proof pressure may be a semi-destructive test and should not be conducted repeatedly on the same gauge. It may be expressed as a pressure or as a percentage of full scale.
Proof Pressures Pressure gauges should not operate continuously at the proof pressure limits stated. The maximum continuous pressure a gauge should be subjected to is 75% of the gauge span per ASME B40.100. Back to FAQs
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