Differential Pressure Filtration

DP Filter Monitors Save Time and Money

  • No mechanical linkage to fail
  • Machined from solid blocks of metal
  • Delivery in 1-2 weeks

Differential Pressure Filter Monitors

Measure pressure drop across filters or strainers to inform the operator when it’s time to service the filter. Monitoring prevents servicing too early or too late.


Save Time & Money

Reliance on scheduled maintenance or using two pressure gauges often results in loss of filter efficiency and wasted time. One simple differential pressure gauge eliminates this wasted time and inefficiency and also errors – which means it pays for itself. One differential pressure gauge with a red arc, or a clean/dirty scale, or electronics can immediately indicate an alarm condition, saving time and problems.

Orange Research has supplied differential pressure filter gauges for over 50 years. Our piston DP models are the low cost gauges for liquids. Diaphragm DP models are used on gas filters. Use on filters or strainers in the most demanding environments. Orange offers the most standard features and options in the industry.

Filter Gauges

Orange is the #1 supplier of filter gauges. Select from 1-inch mini indicators to 6-inch gauges. Add a red arc or electronics to indicate when it’s time to service the filter. Pressure bodies are machined from solid blocks of aluminum, brass or stainless steel, allowing for up to 10,000psi working pressures on some models.

Switches & Transmitters

Switches are available in SPST, SPDT or DPDT. Select one or two switches per unit. Transmitters are available with either 0-5Volt or 4-20mA outputs. Electronics are available with or without a gauge for both local and remote monitoring. Electronics are available for normal or hazardous locations.

Differential pressure filter

Differential Pressure Gauge with Follower Pointer

We look forward to working with you in designing a differential pressure or flow monitor for your specific needs.

Piston Differential Pressure Filter Models

  • For liquid filtration
  • 1-inch to 6-inch dials
  • Handle up to 10,000psi working pressure
  • Low cost at high accuracy
  • Differential pressure ranges start at 0-5psi
  • Add your own logo
  • Over-range protection
  • Modelsspecificationshow to order.

Diaphragm Differential Pressure Filter Models

  • For gas filtration
  • Handle up to 3000psi working pressure
  • Ranges start as low as 0-5″H2O
  • 1 to 6 inch dials
  • Add your own logo
  • Over-range protection
  • Modelsspecificationshow to order.

Mini differential pressure filter

Mini Differential Pressure Indicator

Hazardous Locations

Miniature Differential Pressure Indicators

  • Lowest cost OEM versions
  • Select from liquid or gas versions
  • Switches and transmitters available

WARNING: Some of our products contain Nickel, a chemical known to the State of California to cause cancer. For more information go to: www.p65warnings.ca.gov

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