The Liquid Filled Gauge Dampens the Effect of Pulsation and Vibration, While Also Perpetually Lubricating the Movement and Keeping Contaminates Such As Dirt Away From All Moving Parts Which Will Extend the Life of the Gauge. Typically Used on Hydraulic & Pneumatic Systems as Well as Any Commercial or Industrial Applications Not Corrosive to Brass and Bronze Wetted Parts Where Glycerin Filling is Suitable For Use.
Built-In Snubber 
Stainless Steel Case and Bezel 
Copper Alloy Wetted Parts 
Polycarbonate Lens 
Glycerin Liquid Filled 
Accuracy : 3-2-3% of Span ASME B40.1 Grade B 
Dual Scale: PSI/Bar (x 100=kPa) Standard 
Ambient Temperature: -4 F to 140 F 
Design Meets or Exceeds ASME B40.100 Pressure Gauge Standard