The SGC Series front mount closed circuit sight gages provide front viewing of the fluid level through a clear sight glass. Integral to the sight gage is a thermometer contained within a white colored card for direct reading of the fluid temperature. The white colored card helps draw eye contact to the fluid level quickly. Check valves integral to mounting studs allow for removal of sight gage without having to drain the reservoir. Standard Features: Centerline lengths of 5 and 10 inches Front mount 1.00 x .95 inch body machined from extruded aluminum bar stock Fluid level visible from front of gage (.75 inches wide) Clear sight glass Card thermometer, dual scale 0° to 220°F and -20° to 110°C graduations Mounting studs accommodate reservoir wall thicknesses up to .56 inches Suitable for use with most hydraulic and machine lubricating oils Pressure Rating: 20 psi (138 kPa) maximum working pressure at 150°F (65°C) Access to inside of reservoir is required to mount studs with integral check valves. Caution: Not recommended for use with water, steam, acidic fluids, caustic fluids and volatile fluids.