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DI-4B-25 Air Tool & Impact Wrench Digital Torque Tester

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The new DI-4B-25 fast response torque testers are perfectly suited for on-the-spot calibration of air tools and impact drivers, but will calibrate any type of manual wrenches as well.

This torque tester gives a digital readout of peak value in either direction and also indicate the number of blows for a selected time period.

This torque tester has an accuracy of ±0.5%, ±1 LSD, Peak, Real Time and Peak Down modes, and provides peak data for SPC (statistical process control) via the RS232 port.

Joint simulator thread size 5/16-18 included (10-24, 3/8-16 and M5, M6 and M10 threads sold separately.

Calibrate your own air tools and impact drivers and save down time.


  • Heavy duty metal construction
  • Displays number of blows for selected period (0.1 - 9.9 sec)
  • Selectable Units: lb-ft, kg-m and N-m
  • Both clockwise and counterclockwise operation
  • RS-232 peak data output for SPC capability
  • Peak, Real Time and Peak Down measuring mode (selectable)
  • Runs on internal NiCad batteries (8 hour use)
  • Soft joint, hard joint and AC adapter/charger included
  • ISO/IEC 17025 Long-form Certificate & Test Data is optionally available
  • 2 Year Warranty
  • Includes NIST Traceable Calibration Certificate


Related Products

Click image for more info
Data Acquisition Software for Torque
- Full SPC and graphing capabilities
- Automates your data collection

Complete Kit

The DI-4B-25 is supplied as a complete kit including torque tester, joint simulators, ac adapter/charger, operating instructions and calibration certificate


Capacity0.1~220.0 lbf-in
0.1~250.0 kgf-cm
0.01~25.00 N-m
Accuracy± 0.5% F.S., ±1 LSD

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  Item Price  
DI-4B-25 Torque Tester Complete Kit
Upgrade from 3 point NIST traceable cert to ISO-17025 Certificate
Data Acquisition Software for Torque
USB output cable (formerly CB-208)
In stock
1 Week Lead Time (Estimated)
2-3 Week Lead Time (Estimated)