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Now In: OTC ToolsOTC Hydraulic Tools → OTC Hydraulic Flow Meter, 100 GPM - 4278
OTC Hydraulic Flow Meter, 100 GPM - 4278

OTC Hydraulic Flow Meter, 100 GPM - 4278

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OTC Hydraulic Flow Meter, 100 GPM - 4278

OTC Tools
SKU:    OTC-4278
Price: $2,991.96 
or 3 payments of $997.32 details

The OTC 4278 provides unparalleled accuracy in testing hydraulic flow circuits from 2.5 to 100 gpm for industrial and agricultural machinery.  With its electronic and fluid filled gages that dampen vibration and precisely manufactured components, it can measure flow accurately within 1% of indicated value.  Due to its inner pass system, which includes extra burst discs, overpressure conditions won't lead to hydraulic fluid spills and the components can accommodate bi-directional flow, reading flow in one direction.


  • Tests hydraulic oil circuits on your machinery with high accuracy
  • Protected by a durable steel case
  • Measures flow from 2.5 to 100 gpm
  • Flow Accuracy to +/- 1% of indicated value
  • Pressure accuracy of +/- 1.6% of full scale
  • Pressure range up to 6,000 psi
  • Temperatures up to 250 deg F
  • Standard burst disc protection system prevents spillage of hydraulic fluid in the event of an overpressure condition
  • Accommodates bi-directional flow, reads flow in both directions, pressure on the high side of valve
  • Port is 1-5/16” -12UN #16 SAE ORB
  • Requires 1 9V battery (included)

Product Dimensions: 

  • 9.45 × 7.87 × 7.87 in

Product Weight: 

  • 14 lb

OTC Hdyraulic Flow Meter User Manual

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