What it is
A differential pressure gauge, or DP gauge, has two connections: a high-pressure side and a low-pressure side. The dial shows the difference between them.
We supply low-range gauges for air and magnet-type gauges for higher ranges.
How it works
The two pressures act on opposite sides of a sensing element. Only the difference moves it, so the pointer shows the pressure drop. When the drop across a filter rises, the filter is blocking up and needs cleaning or changing.
Where it is used
- Filter and strainer monitoring
- Cleanrooms and HVAC air handling
- Pump and heat-exchanger performance
- Level measurement in closed tanks
Things to consider
- Connect the high and low ports to the correct sides.
- Choose a range that covers the clean and the blocked condition of the filter.
- A three-valve manifold makes it easy to isolate, vent and zero the gauge.
What to tell us for a quote
- Gauge type and dial size
- Pressure range and unit (bar, kg/cm², psi, kPa)
- Connection type and size
- Material of the wetted parts (CS, SS or SS 316)
- The medium and its working temperature
- Quantity and any special need
Questions about differential pressure gauges
How do I know when a filter needs changing?
Note the reading with a clean filter. When the differential reaches the limit set by the filter maker, the filter should be cleaned or replaced.
Need differential pressure gauges?
Send us the range, medium and connection and we will quote.