POWERS Controls Analog Receiver Gauges are round dial instruments that indicate the output signal from a pneumatic transmitter. The gauges are available in three sizes. The 1-1/2-inch gauge is pipe mounted only. The 2-1/2 and 3-1/2 inch gauges are flush mounted, usually in the central control panel. This is a 2-1/2" Pressure Gauge that rangers from 0 to 160 PSI.