P255 (Oil Filled) with crimp casing models are designed for corrosive
environment which do not corrode copper alloy and have high viscosity or do not
crystallize. Systems or equipment with pulsating pressure & vibration are
apparent, the oil filled model is recommended.

Dial Display: 2.5" or 4"
Connection: 1/4" Male NPT
Mount: Bottom
Case: Stainless Steel 304
Window: Polycarbonate plastic
Element Tube: Bottom
Connection: Stainless Steel 304
Accuracy: ±1.6% of range
Pressure range: PSI/bar/kPa, dual scale
Blow Protection: Top, Rubber
Ambient temperature:-4 to 140 °F
Process: Maximum 140 °F
Do not use for oxygen service

Resources

Technical Datasheet for Unijin P255 Pressure Gauge