What does a Compound Gauge display?

What does a Compound Gauge display?

• A. Displays negative and positive pressure measurements
• B. Measures temperature
• C. Measures humidity
• D. Measures flow rate

Answer: (A)

A compound gauge measures pressure in both directions from atmospheric pressure, showing vacuum (negative) and positive pressure on the same dial. The zero mark represents atmospheric pressure; readings to the left indicate negative pressure (vacuum) and readings to the right indicate positive pressure. This is useful in systems where pressure can swing below and above atmospheric, such as in suction or pressurized lines. It’s different from devices that measure temperature, humidity, or flow, which are a thermometer, hygrometer, or flow meter respectively.

A compound gauge measures pressure in both directions from atmospheric pressure, showing vacuum (negative) and positive pressure on the same dial. The zero mark represents atmospheric pressure; readings to the left indicate negative pressure (vacuum) and readings to the right indicate positive pressure. This is useful in systems where pressure can swing below and above atmospheric, such as in suction or pressurized lines. It’s different from devices that measure temperature, humidity, or flow, which are a thermometer, hygrometer, or flow meter respectively.