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Sage Technologies, Inc.
 (817) 488-2579
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Transducers for Oilfield Dynamometer Testing

Sage Technologies offers a selection of durable and high quality transducers for use with the AFL IV with Dynamometer.

All pressure transducers are supported in the Sage AFL and Sage DYN software for easy data gathering with the Acoustic Fluid Logger IV (see right) and the AFL IV with Dynamometer (see below).

Optional Transducers for use with the AFL IV with Dynamometer include:

  • Quick Clamp Qualitative Load Cell Transducer
  • 40K Quantitative Horseshoe Load Cell Transducer
  • Sage String Transducer
  • Sage Current Clamp Transducer

Quick Clamp Load Cell Transducer

Quick Clamp Transducer for dynamometerThe Quick Clamp Load Cell is easy to use for a quick qualitative look at pump performance. The Quick Clamp Load Cell is a precision polished-rod load cell that uses the latest sensor technology to accurately measure smaller changes in rod loads than other similar devices.

The cost-effective transducer can fit all rod sizes, eliminating the need for separate transducers for each rod size. Users can quickly fine-tune the device to variations in rod diameter by adjusting the ball seat on the clamp. It allows for fast hand-operated clamping action, enabling an easy tool-free installation, which reduces set-up time. The universal adapter kit included with the Quick Clamp Load Cell allows the transducer to fit all rod sizes by changing out the jaws inside the load cell.

The transducer’s high sensitivity to changes in the load weight provides a more detailed dynamometer card which allows for accurate rod pump analysis. Precision stainless steel moving parts provide for a reliable field operation. And, the on-board thermal correction provides excellent stability in harsh oilfield conditions.

The Quick Clamp Load Cell transducer clamps to the polished rod below the carrier bar in a quick set-up motion. The Quick Clamp Load Cell does not change the relationship between the pump and the barrel, making it ideal for a quick dynamometer analysis. With the Sage DYN software, the Quick Clamp Load Cell allows easy gathering of surface pump cards, calculation of downhole pump cards, standing valve check and traveling valve checks. This allows complete pumping unit diagnostics.

The Quick Clamp Load Cell is approximately 3 ¾” diameter x 10 ¾” handle length. The Sage DYN software has a special selection for the Quick Clamp Load Cell that allows for easy calibration and data collection with the AFL IV with Dynamometer.

40K Quantitative (Horseshoe) Load Cell Transducer

40K Quantitative Horseshoe Load Cell The 40K Horseshoe Load Cell is used to accurately measure polish rod load. The Horseshoe Load Cell has a vertical install height of 3.5 inches.

The Horseshoe Load Cell is a very versatile and accurate way to measure polished rod load. One Horseshoe Load Cell allows you to deal with both common methods of load cell insertion without the need for varying load cells.

The readings from the Horseshoe Load Cell are gathered using the Sage DYN software, to obtain a surface card with the AFL IV with Dynamometer system. A downhole pump card is calculated using the rod string detail. Both a standing and a traveling valve test can be performed. The software calculates pump leakage, standing valve leakage, traveling valve leakage and other items. A counterbalance may also be performed. In addition, the Horseshoe Load Cell has an in-the-field zero transducer function. The in-the-field calibration allows for greater absolute accuracy and compensation for transducer drift over time. Sage Technologies also offers a complete recalibration service if needed, on all load cells.

This load cell can be installed either of two ways. Note: Before installing the Horseshoe Load Cell with either of these two methods, the motor has been shut off and the pumping unit brake has been set.

Method One: Horseshoe Load Cell Install

The first install method is to place the Horseshoe Load Cell between the carrier bar and the rod clamp. To install the Horseshoe Load Cell using this method, a stuffing box protector is used to extend slightly above the stuffing box. A temporary knock-off stand is positioned on the stuffing box protector. A fine thread rod clamp is temporarily installed on the polished rod above the knock-off stand, such that on the downstroke, the temporary polish rod clamp will come in contract with the knock-off stand. This produces separation between the carrier bar and the top rod clamp.

At this point, the Horseshoe Load Cell is inserted between the carrier bar and the permanent rod clamp. The brake on the pumping unit is slowly released causing the slack to pick up between the carrier bar and the permanent rod clamp. This applies the load to the Horseshoe Load Cell. The knock-off stand may now be removed and the well motor started for the dynamometer test.

Method Two: Horseshoe Load Cell Install

The second install method for the Horseshoe Load Cell allows the elimination of any errors that might be caused by raising the pump in the barrel as happens when you insert the Horseshoe Load Cell between the carrier bar and the permanent champ clamp. It requires that an inexpensive spool spacer be permanently installed between the carrier bar and the permanent rod clamp. The spool spacer has dimension that allows the Horseshoe Load Cell and a special hydraulic lift mechanism to be inserted in the spool spacer. The hydraulic lift occurs with the help of a hand pump and hydraulic hose. As the unit lifts up, a small shim spacer is inserted between the lift and the Horseshoe Load Cell. Then as the hydraulic pressure is released, the load is applied through the shim spacer directly onto the horseshoe load cell. The hydraulic hose is removed, the pumping unit started, and you are ready for the dynamometer test.

Method Two, the hydraulic lift method, allows for use of the Horseshoe Load Cell without the corresponding thickness offset of 3½ inches caused by inserting the load cell as in Method One. The AFL IV with Dynamometer and Sage DYN software will record data with either method of load cell install.

Sage String Transducer

String Transducer for Dynamometer useThe Sage String Transducer is sealed to perform even under the harshest of environmental conditions, to monitor the position of the rod string during dynamometer testing. The Sage String Transducer operates with the AFL IV with Dynamometer and the Sage DYN software to collect accurate testing data.

The use of a quality string transducer ensures proper position data across the entire range of pumping configuration, without the inherent inaccuracies involved when using an accelerometer to determine rod string position.

The durable and highly accurate Sage String Transducer installs in seconds, functions properly without perfect alignment, and yet when the cable is retracted, it measures only 6 inches. Nylon-coated stainless steel cable and a powder-anodized aluminum shell ensure maintenance free operation.

Sage Current Clamp Transducer

Current Clamp TransducerThe Sage Current Clamp Transducer allows easy measurement of the Motor Current throughout the pumping cycle on both the upstroke and the downstroke. This allows easy viewing and analysis of the pumping unit, for quick pumping unit balance.

The current transducer is a small handheld device with an opening jaw that is easily clamped around the power wires in the control panel. To use the Sage Current Clamp Transducer, you do not need to make any changes to the control panel, as some other devices require.

During testing with the AFL IV with Dynamometer, the Sage DYN software displays a motor current plot -- also known as an Amp Plot -- for quick visual analysis. A cable and reel attach the Sage Current Clamp to the AFL IV with Dynamometer recorder.


Extra cables, cable reels, carrying cases and other accessories and supplies are available from Sage Technologies. See the Supplies tab for more details.


For more on Sage transducers download the .pdf  AFL IV with Dynamometer manual on the Downloads tab.

Click for a brochure on Transducers from Sage Technologies, available on the Downloads tab.


for fluid level testing

Pressure Transducer connected to PPG
1,500 psi Pressure Transducer
3,000 psi Pressure Transducer

Shown above, the 3,000 psi Sage Pressure Transducer attached to the top of the 3,000 psi Pressure Pulse Gas Gun. This allows a pressure build-up to be run before the fluid level test, which can be used to calculate gas afterflow.

The Sage Pressure Transducer is a high quality stainless steel media isolated pressure sensor, intended for the use of measurement of liquids and gases. Utilizing Krystal Bond ™ technology, the Sage Pressure Transducer offers a one-piece stainless steel sensing element free of welds, internal o-rings or oil fill. This translates into rugged construction, high cycle life and a wide range of media compatibility.

The Sage Pressure Transducer can be easily attached to the Pressure Pulse Gas Gun via its Swagelok quick-connect. The fitting allows fast and easy hand installation. All connections are watertight and the electrical output is via 4-20ma current loop for outstanding noise immunity.

Sage Pressure Transducer

The Sage Pressure Transducer is available in the ranges of 1,500 psi and 3,000 psi and includes a cable for connection to the Acoustic Fluid Logger IV or AFL IV with Dynamometer.

For more information on the operation of the Sage Pressure Transducer, see the Pressure Pulse Gas Gun page, or download the Acoustic Fluid Logger IV Operator's Manual.