The Differential Water Pressure Gauge Indicator is used to measure and display the difference in pressure with a dial with a pointer that moves across a calibrated scale labeled in units such as pounds per square inch (psi) which helps measure the water pressure within the engine.Attributes:• Covered with a metal case for protection from external elements• Features a red pointer for clear identification of the water pressureApplications:The Differential Water Pressure Gauge Indicator is used for monitoring and displaying the difference in water pressure within the cabin's water unit with real-time readings for the operator to identify any issues that may arise.