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 G_F is defined by the formula

where R_G 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