Photo of Model 4422.

Micro Crackmeter

Model 4422

The Model 4422 is a miniature crackmeter intended to measure displacements across surface cracks and joints. It has been specially designed for applications where access is limited and/or where monitoring instrumentation is to be as unobtrusive as possible (e.g. on historical structures or buildings).

Specifications
Standard Range 3 mm (±1.5 mm)
Resolution 0.025% F.S.
Accuracy ±0.1% F.S.
Nonlinearity <0.5% F.S.
Temperature Range −20°C to +80°C
L × Diameter 120 × 7.9 mm