Products for USB Sensing and Control
Products for USB Sensing and Control

Half-bridge Steel Torque Strain Gauge (Bag of 2)

ID: 3142_0

Designed for steel structures, this strain gauge comes in the half-bridge shear configuration.


A strain gauge is a small sensor whose resistance changes depending on the strain experienced by the structure it is attached to. They are similar to Load Cells, but are useful for applications where the structure has already been built. For example, you could use a strain gauge and a bridge interface to measure the strain on various segments of the chassis of a robot or vehicle.

This strain gauge is designed to be used with steel structures. It can be used with other materials, but using steel will result in the lowest sensitivity to changes in temperature. The double shear pattern makes it easy to mount for torsional strain measurement.

For more information on the different types of strain gauges and how to properly install them, have a look at our Strain Gauge Primer.


This is a half-bridge strain gauge. You can either use two to form a full-bridge circuit, or use resistors with a half-bridge. For more information on bridge circuits, see the Strain Gauge Primer. Strain gauges require power and produce a small voltage differential when under load. In order to read this small signal, you'll need an amplifier or a board with a high-precision analog-to-digital converter. See the Connection & Compatibility tab for a list of Phidgets that will connect to this strain gauge.

What's Included

  • Two Half-bridge steel torque strain gauges
  • Strip of six solder pads

Bridge Interfaces

Load cells and strain gauges produce a very tiny voltage differential and must be read by a high-resolution analog-to-digital converter. The bridge interfaces in the table below can be used to interface them. For more information on how to properly attach a strain gauge, see the Strain Gauge Primer.

Product Board
Image Part Number Price Controlled By Number of Bridge Inputs
1046_0B $90.00 USB (Mini-USB) 4
DAQ1500_0 $30.00 VINT 2

Product Specifications

Sensor Properties
Controlled By Bridge Input
Sensor Type Torque Half-bridge Strain Gauge
Strain Gauge Mount Type Steel
Electrical Properties
Resistance Value (per quarter-bridge) 1 kΩ
Physical Properties
Backing Material Phenolic Resin
Active Area Length 3 mm
Customs Information
Canadian HS Export Code 8423.90.00
American HTS Import Code 8423.90.10.00
Country of Origin CN (China)


Check out our strain gauges:

Product Sensor Properties Electrical Properties
Image Part Number Price Sensor Type Strain Gauge Mount Type Resistance Value
3143_0 $12.50 Torque Half-bridge Strain Gauge Aluminum (per quarter-bridge) 1 kΩ
3144_0 $15.00 Half-bridge Strain Gauge Steel (per quarter-bridge) 1 kΩ
3145_0 $15.00 Half-bridge Strain Gauge Aluminum (per quarter-bridge) 1 kΩ