The following information is for the EMANT300, EMANT380

Pinch Meter Assembly

A Pinch Gauge or Pinch Meter measures pinch strength in hands. It is a useful tool for the early detection of motor function loss. It comprises a strain gauge mounted on a bracket. It requires the

  • bridge sensor application adaptor
  • bridge completion network
  • either the EMANT300 USB DAQ or EMANT380 Bluetooth DAQ

This Pinch Meter Assembly is used to demonstrate a typical application of the strain gauge. It is not for medical/diagnostic use on patients.

Strain Gauge Mounted Bracket

A strain gauge mounted on a bracket is used to construct the pinch meter assembly. The strain gauge consists of a metallic foil pattern etched onto a flexible backing. As the bracket is deformed, the foil pattern is deformed, causing its electrical resistance to change. The gauge factor of a strain gauge relates strain to change in electrical resistance. The gauge factor GF is defined by the formula

where RG is the resistance of the undeformed gauge, ΔR is the change in resistance caused by strain, and ε is strain. ΔR is typically in the region of 0.1%. To measure such small resistance changes, a Wheatstone bridge is employed.

Quarter Bridge Connection

Fig 1: Connecting the strain gauge to the network and Bridge Sensor Adaptor

Specification (PDF file size 120K)

Price US$20
Status Discontinued