How to measure PTO power in real time?

The PTO425 Torque and Power Monitor is installed inline between the tractor's power takeoff shaft and your attachment, allowing you to measure the true shaft power. Using the Datum Link app, the PTO425 connects over Wi-Fi to capture and report live shaft measurements including torque, speed (RPM), and shaft power.

How much does Datum Link cost?

Datum Link is completely free to download and use, and there are no subscription costs.

What data does Datum Link log and display?

Datum Link logs and displays Torque, RPM, Shaft Power, Thrust, Angle, Rotations, Depth, GPS location, Date/Time and more. The exact data displayed will vary depending on whether the user connects to a Datum 425 Series or Datum AH Series sensor.

What sensors are compatible with Datum Link?

Datum Link is compatible with two sensor families, the Datum 425 Series and the Datum AH Series, the latter of which includes the RADIX 8000 PTM. For older Datum Electronics transducers, please get in touch with our team.

Where can I download Datum Link?

Datum Link is available for download from the App Store for iPhone and iPad, as well as on Google Play for Android Devices, and the Microsoft Store for Windows 11 PCs.

PTO Torque & Power Monitoring System | Power Takeoff Shaft Sensor

425 Series PTO Shaft Torque and Power Monitor Datum Electronics

PTO425 torque transducer with splined PTO interface

PTO Torque & Power Monitoring System:
Wireless Power Take-Off Performance Monitoring for Agriculture & Industry.

The Datum Electronics PTO (Power Take-Off) Torque and Power Monitoring System collects and logs the torque, shaft speed, and transmitted power accurately when testing systems driven from all standard PTO shafts.

Designed for rugged field environments, the system delivers accurate and reliable shaft torque, speed and power data under demanding tractor-powered applications. Ideal for users seeking to validate equipment performance, optimise transmission efficiency, and ensure safe, effective operation in agriculture and industry.

Applications

Tractor PTO shaft monitoring
Drivetrain performance testing
OEM product development
Efficiency savings analysis

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Key Features

Benefits

Specifications

Downloads

Case Studies

FAQs

Key Features

Direct Measurement of Torque, Speed & Shaft Power:
Measures bidirectional torque, RPM, and calculated shaft power from the PTO driveline.
Non-Contact Strain-Gauge Technology:
On-shaft electronics and wireless telemetry transmit data without slip rings or mechanical contact.
Highly Accurate Measurement:
High-accuracy measurement for research, validation, and performance assessment.
Compatible with Standard PTO Shafts:
Available in common agricultural spline configurations and designed to integrate into existing PTO systems.
Wi-Fi, RS-485 & Analogue Outputs:
Supports wireless monitoring, digital communications, and analogue system integration.
Datum Link Compatible:
Live monitoring, data logging, configuration, and export via iOS, Android, and Windows devices.

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Complete the form below and a member of our team will be in touch.

Benefits

Measure Actual PTO Performance:
Obtain real torque, power, and speed data directly from the shaft rather than relying on estimates or engine-derived calculations.
Validate Machinery Efficiency:
Quantify how effectively power is transferred from the tractor to the driven implement. Supported by references to performance validation and efficiency optimization.
Low Installation Time:
Designed around standard PTO interfaces for straightforward integration into existing driveline arrangements.
Monitor Equipment in Real Time:
View torque, power, and RPM live during field tests, development programmes, and operational assessments.
Capture and Export Test Data Easily:
Log results for analysis, reporting, benchmarking, and long-term performance evaluation.
Operate Reliably in Demanding Environments:
Suitable for field-based agricultural and industrial applications thanks to its robust construction and IP65 protection.

Stockists

Specifications

PTO Model	Rated Load	Power	Speed (RPM)	Accuracy	Protection	System weight (kg)
Male / Female 1 ¾" x 6 spline	2,500 N·m 1,843.9 lbf·ft	190HP or 141kW at 540rpm; 350HP or 261kW at 1000rpm	540/1000	0.1%	IP65	5.4
Male / Female 1 ¾" x 20 spline	2,500 N·m 1,843.9 lbf·ft	190HP or 141kW at 540rpm; 350HP or 261kW at 1000rpm	540/1000	0.1%	IP65	5.4
Male / Female 1 ⅜" x 6 spline	1,800 N·m 1,327.6 lbf·ft	135HP or 101kW at 540rpm; 253HP or 188kW at 1000rpm	540/1000	0.1%	IP65	4.4
Male / Female 1 ⅜" x 21 spline	1,800 N·m 1,327.6 lbf·ft	135HP or 101kW at 540rpm; 253HP or 188kW at 1000rpm	540/1000	0.1%	IP65	4.4

Downloads

PTO425 Torque Power Monitor Datasheet Thumbnail

PTO Torque & Power Monitoring System: Product Overview & Datasheet

Technical overview of the PTO425 Torque & Power Monitoring System by Datum Electronics.

1 file(s) 1.89 MB

Download

Datum Link - User Manual

User manual for Datum Link software, covering app features, installation, connectivity, troubleshooting, operation and more.

1 file(s) 7.37 MB

Download

Case Studies

PTO torque and power monitoring system installed between tractor and Coolamon chaser bin during grain transfer

Case Study: Grain Cart Auger Testing: PTO Torque & Power Monitoring

Coolamon Chaser Bins acquired a Datum PTO Monitoring System to assess their agricultural equipment’s performance in challenging environments.

1 file(s) 492 KB

Download

Datum Electronics 420 Series PTO Shaft Torque & Power Monitoring System installed on agricultural machinery

Case Study: Powershift Gearbox Validation: PTO Torque & Efficiency Testing

Read how Comer Industries validated gearbox efficiency and improved fuel economy by up to 30% using PTO torque testing in real-world conditions.

1 file(s) 716 KB

Download

FAQs

How to measure PTO power in real time?
The PTO425 Torque and Power Monitor is installed inline between the tractor’s power takeoff shaft and your attachment, allowing you to measure the true shaft power. Using the Datum Link app, the PTO425 connects over Wi-Fi to capture and report live shaft measurements including torque, speed (RPM), and shaft power.

How much does Datum Link cost?
Datum Link is completely free to download and use, and there are no subscription costs.
What data does Datum Link log and display?
Datum Link logs and displays Torque, RPM, Shaft Power, Thrust, Angle, Rotations, Depth, GPS location, Date/Time and more.

The exact data displayed will vary depending on whether the user connects to a Datum 425 Series or Datum AH Series sensor.
What sensors are compatible with Datum Link?
Datum Link is compatible with two sensor families, the Datum 425 Series and the Datum AH Series, the latter of which includes the RADIX 8000 PTM.

For older Datum Electronics transducers, please get in touch with our team.
Where can I download Datum Link?
Datum Link is available for download from the App Store for iPhone and iPad, as well as on Google Play for Android Devices, and the Microsoft Store for Windows 11 PCs.