Torque & Force Testers

The ESM303 is a highly configurable single-column force tester for tension and compression measurement applications up to 300 lbF [1.5 kN], with a rugged design suitable for laboratory and production environments. Sample setup and fine positioning are a breeze with available FollowMeTM force-based positioning - using your hand as your guide, push and pull on the force gauge or load cell to move the crosshead at a variable rate of speed.

With generous travel, clearance, and depth dimensions, a wide range of tests can be performed, including break testing, cycling, limit testing to a load or distance, loadholding, elongation testing, tensile testing, compression testing, and more. Satisfy various test methods through an easy-to-use menu, allowing the configuration of test speed, force and distance limits, cycling, preload, and many other functions, all protected by a password. Save up to 50 profiles to accommodate a range of test methods.

When the ESM303’s clearance is insufficient for the application, its modular mechanical design allows for single- and double-column extensions. Modularity extends to the controller functions as well. Individual functions, such as travel measurement, cycling, loadholding, etc., may be purchased either upfront or enabled in the field through an activation code. This a-la-carte platform allows for custom configuration as appropriate for the application and budget.

Standard Features for the Motorized Test Stand

  • Selectable speed setting
  • Upper and lower travel limit switches
  • Adjustable, removal controller with intuitive menu navigation
  • Password protection of test parameters
  • Stepper motor-driven, producing smooth and quiet operation with no speed variation under load
  • USB output of force vs. time or force vs. travel
  • Compact footprint, suitable for crowded workbenches
  • Ergonomic design, with smart, clean cable management
  • Integrated electronics assembly, easily removed and transported

Optional Functions

Any of the below functions may be purchased at time of order or may be activated in the field at a later date via an activation code. A complete options package is also available at a discounted price. The stand is supplied in Demo Mode, a 160-hour time period in which all functions are temporarily enabled.

Feature Part No. Description Requirements
FollowMeTM AF008 AF008

Crosshead movement responds to manually pushing or pulling on the force gauge shaft or load cell. Increasing force produces greater speeds. Ideal for setups and quick positioning.

- Series 7 or 5 gauge or indicator with load cell

- 09-1214 interface cable

Travel indication AF009

Travel is indicated on the control unit display, with output via USB. An internal scale utilizing Renishaw technology produces significantly higher accuracy than with conventional rotary encoder based designs. Backlash and nonlinearity are virtually eliminated.

- Field hardware installation required.

- If data output to a PC is required, add 09-1214 and 09-1158 cables, and a Series 7 or 5 gauge or indicator with load cell.

Computer control AF010

The ESM303 may be fully controlled by a PC through a custom-written program in any language supporting ASCII communications.

- Series 7 or 5 gauge or indicator with load cell

- AF009 travel indication

- AF011 programmable travel set points

- 09-1214 interface cable

- 09-1158 USB output cable

Programmable travel limits AF011

The stand stops at or cycles between programmable upper and lower travel distances.

- AF009 travel indication option

Overload protection AF012

Protects a force gauge or force sensor against overload. Program the desired percentage of full scale of the gauge. Adjustable analog voltage setting allows the stand to interface with virtually any gauge with analog output.

- Series 7 or 5 gauge or indicator with load cell

- 09-1214 interface cable

Auto return AF013

The crosshead moves to a limit switch, force set point, travel position, or break, then stops and reverses direction at full speed to the opposite limit.

- If reversing at force set point: Series 7 or 5 gauge or indicator with load cell, and 09-1214 interface cable

- If reversing at travel limit: AF011 programmable travel limits option

- If reversing at break: AF019 break detection option and 09-1214 interface cable

Cycling / dwell time AF014

Same as auto return, but with the ability to program up to 100,000 cycles. Programmable dwell time for upper and lower limits (set independently) can be set up for up to 10,000 seconds.

- Same as auto return, at the same speed in each direction. Add AF016 for independent up and down speeds.

Independent up and down speeds AF016

Individually configure speeds for the up and down directions.


Low speed range extension AF017

Extends the standard speed range down to 0.02 in/min (0.5 mm/min).


High speed range extension AF018

Extends the standard speed range up to 45 in/min (1,100 mm/min).


Break detection AF019

Crosshead stops at a sudden drop in force. Programmable percentage of peak force

- Series 7 or 5 gauge or indicator with load cell

- 09-1214 interface cable

Load holding AF020

Dynamically adjusts the crosshead position to maintain a programmed load for an indefinite or specified period of time.

- Series 7 or 5 gauge or indicator with load cell

- If a specified time is required, add AF014 cycling / dwell time option

- 09-1214 interface cable

Preload / sample touch AF021

Stops the crosshead and/or zeroes the travel display at an initial preload - useful in tensile, compression, spring, elongation, and other applications. Preload is programmable as a percentage of force gauge/load cell full scale. Three modes: (1) stop, (2) stop and zero, and (3) zero without stopping.

- AF009 travel indication

- Series 7 or 5 gauge or indicator with load cell

- 09-1214 interface cable

Profiles AF022

Save and recall sets of test parameters, such as speeds, travel limits, preloads, etc. Up to 50 profiles may be stored.


Complete options package AFCOMP

Includes all functions listed above, plus 09-1214 interface cable and 09-1158 USB cable. Requires a Series 7 or 5 gauge or indicator with load cell.


Technical Specifications for Motorized Test Stand ESM 303

Load capacity:

< 24 in [610 mm]/min:

> 24 in [610 mm]/min:


300 lbF [1.5 kN]

200 lbF [1 kN]

Speed range: Standard: Optional: 0.5 - 13 in/min [13 - 330 mm/min] 0.02 - 45 in/min [0.5 - 1,100 mm/min]
Maximum travel: 18.0 in [457 mm]
Speed setting accuracy: ±0.2%
Speed variation with load: ±0% [Stepper motor driven]
Travel accuracy: ±0.002 in per 10 in [±0.05 mm per 250 mm]
Travel resolution: 0.001 in [0.02 mm]
Limit switch repeatability: ±0.001 in [0.03 mm]
Power: Universal input 80-240 VAC, 50/60 Hz
Weight: 56.5 lb [25.6 kg]


For more information about Programmable Motorized Force Test Systems - ESM 303, please call us at 1.877.884.8378 or Click the button below.