Dynamometers
Formerly known as Froment and now rebranded as Avtron, our PTO dynamometers provide unparalleled features and control capabilities for agricultural machinery up to 680ps. Trusted by leading agricultural manufacturers and service teams, our dynamometers ensure the longevity and reliability of their equipment. These self-contained, air-cooled units are available as trailer-mounted or static models, equipped with comprehensive DynaTest PC software for automated testing and reporting.
Air-Cooled
Self contained, air-cooled units with a minimal cool down period.
High Power Testing
Available in 2 models types for testing agricultural machinery from 515-680PS.
Leading Control
Available with a hand-held or advanced DynaTest software with auto testing and reporting.
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Try it NowFroment 515 & 680 Dynamometer Features
Our dynamometers offer exceptional technical features, ensuring reliable and precise
testing across a variety of agricultural machinery including tractors, foragers and harvesters.
Click the hotspots below to see the features and benefits of our market leading dynamometers.
Available to control with either a hand-held or for more
in-depth testing use the DynaTest PC software.
Available as a static unit for workshop use or trailermounted
for mobile use.
Supplied with all the necessary drive shafts to
complement the dynamometer’s performance.
Low maintenance and minimal calibration required.
It’s a manoeuvrable, self contained, air-cooled unit with a
minimal cool down period.
Low start-up torque means engines from as little as 10 hp
or up to 680 hp can be tested.
Accurate fault finding and diagnostics within routine
servicing schedules, pre-delivery inspections and
warranty problems.
No need for the operator to have prior knowledge
where maximum power and torque occur in the engines
performance curve. Auto mode does the test for you
with complete repeatability.
It only requires a single-phase mains supply at 50Hz,
220-240V. Other voltages or frequencies are available
on request.
Three different speed ranges. Tractor power take off
speed range 270-1250 rpm. Remove the gearbox for
direct drive range of 480-2200 rpm (optional removal
tool is available).
Five different test modes are standard: Automatic,
Constant speed, Constant power, Direct load and
Memory.
Inbuilt protection and detection keeps the user
informed of dynamometer status.
Used by leading manufacturers, for the development
of new products and the training of service and sales
personnel.
Vertical hot air discharge with sliding cover for protection when not in operation.
Dynamometer Models
Froment 515 Dynamometer
Test up to 515PS • Static or Trailer Mounted
Froment 680 Dynamometer
Test up to 680PS • Static or Trailer Mounted
Dynamometer Control
SIGMA Hand-held
Fast and accurate testing on a simple to use hand-held control.
SIGMA DynaTest
Advanced PC software for comprehensive, automatic testing and reporting.
SIGMA BT Adapter
Control the latest generation of Avtron Dynamometers wirelessly.
Partnerships
Dynamometer FAQs
The diesel engines fitted to agricultural machines such as tractors are different from those fitted to ordinary vehicles in one very important respect. They often have to operate at full power output for long periods of time.
For some applications, such as ploughing, the ability to produce maximum power can be of critical importance. A performance decrease of only a few percent can make a significant difference to the time taken and costs of completing a job. This means that effective maintenance of an agricultural engine, particularly those aspects that influence its ability to produce maximum power, is essential.
This presents a problem if you are responsible for maintaining these vehicles because it can be difficult to detect a small reduction in performance using subjective methods. This is especially true when the reduction has occurred gradually over a period of time. It can be equally difficult to assess small improvements, or to demonstrate that the maintenance work or adjustments you have carried out have been effective.
The only way to be sure of this is to use a mechanical device to test the engine operating under full load and accurately measure its power output. This must be done with an instrument that is capable of providing reliable and repeatable measurement that can be compared against specifications or previous tests.
For vehicles fitted with Power Take Off (PTO) output shafts, the most effective way of doing this is to use a PTO driven dynamometer designed for the task.
We have aligned all of our products under the Avtron name to leverage Avtron’s global brand strength, enhance innovation under a unified brand and improve global customer support.Â
Yes, the adjustable software and shafts mean that Avtron dynamometers can be used on most sizes of tractors, foragers and combines.
Both have many useful features however for data capture and reporting capabilities DynaTest PC control is the control of choice.
No, we utilise a highly efficient internal cooling fan.
Yes, our design allows for the engine running at high power for long periods of time.
Apart from the input shaft, the rotor of the Burden alternator and the cooling fans, there are practically no moving parts in the Dynamometer resulting in low maintenance costs.
Yes, clockwise and anticlockwise, it can also be run directly (not through the gearbox) allowing for engines to be bench tested directly. Â
Yes, some of our customers are already using portable suitcase  generators for testing machines in remote places.
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