GF-Series gauges are calibrated with dual scales for reading for pressure and force. 
The force readings allow you to measure external loads, such as those supported by a cylinder or jack, or the force used for pressing parts.  
The glycerin within the gauge protects pressure sensing parts from vibration, sudden changes in pressure and from moisture. 
The GF-Series Gauges feature a 4” (100 mm) diameter face for easy readability, and a stainless-steel casing for corrosion resistance.