Single Line Weight Indicator System

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Reliable, accurate, wireline-type weight indicator protects downhole tool investment

Forum Single Line Weight Indicator systems provide accurate measurement of downhole tool weights during wireline operations and heel or floor block applications. Ideal for use by wireline service trucks, each hydraulically-operated system includes a Tension Load Cell and a Gauge, connected by a Hydraulic Hose.

Indicator Tension Load Cell


  • Forum assembles, calibrates, loads with fluid, and tests each system before shipment, and includes calibration and pull test certificates in the shipment.
  • Available in a range of capacities: 2000, 4000, 5000, 6000, and 10,000 pounds.
  • Heavy-duty hydraulic hoses, available in lengths of 50, 75, and 100 feet.
  • Easy-to-read 6-inch dial gauge faceplate displays weight in pounds, kilograms, and decanewtons.
  • Integral damper assembly increases pointer sensitivity for accuracy even with the smallest loads.
  • Additional sizes and configurations to meet your specific needs are available upon request.
Type Capacity Load Cell Description

A64 Series

2,000 pounds

Light-weight aluminum tension load cell

A80 Series

4,000, 5,000 pounds

Steel tension load cell

A653 Series

6,000, 10,000 pounds

Heavy-duty piston-type cylinder


  • Calibration to ± 0.5% accuracy ensures reliable readings, reducing loss of valuable downhole tools.
  • Rugged design for operation in extreme environments, within ambient temperatures of -29° to 49° C (-20° to 120° F).
  • Available in a variety of capacities and line lengths, giving you the flexibility to choose the right solution for any job.
  • Operator-adjustable pointer response time and calibration controls for custom onsite adjustment.
  • Offers years of cost-effective, low maintenance service. Routine repairs can be performed by the operator.