Low Side Compound Refrigerant Manifold Gauge R410a -30 To 250 Psi pressure readings, R410a temperature scale. General usage gauges for multiple applications where pressure or vacuum readings are required. Dampening helps reduce excessive needle fluttering making the gauge much easier to read. Internal components are compatible with many industry applications. The ability to recalibrate the gauge is a standard feature on all gauges. Temperature scale reads in °F and pressure is displayed in PSI.