BTM Series for Strain in Bolt Measurement

Used for measurement of tensile strain of bolt, heat curing A-2 adhesive for long-term stability

About the BTM Series for Strain in Bolt Measurement

BTM/BTMC series bolt strain gauge
These gauges are used for measurement of tensile strain of bolt. They are simply inserted into pre-drilled hole in the bolt with exclusive adhesives. This method is recommendable when an ordinary strain gauges can not be mounted on the bolt surface. Accurate tensile force measurement is possible by calibrating the bolt after installing the bolt gauges.

The BTM bolt gauges use heat-curing A-2 adhesive for installation, which provides better long-term stability

Features BTM Series

  • Gauge resistance: 120Ω
  • Gauge length: 1, 6mm
  • Hole drilled: 1.6, 2mm

Specifications

Applicable specimen
Bolt M10 or larger
Operational temperature(°C)
-10~+80°C
Temperature compensation range(°C)
-
Bonding adhesive
A-2 (BTM), CN(BTMC)
Backing
Special plastics
Element
Cu-Ni
Strain limit
0.5% (5000×10⁻⁶ strain)
Fatigue life at room temperature
-
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