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Displacement Transducers

Convergence Meters (VW) | Model 4425

  • Model 4425 Convergence Meter.
  • Closeup of Model 4425 Convergence Meter.
Model 4425

The Model 4425 Convergence Meter is used to monitor closures in underground excavations, tunnels, etc. It is comprised of a spring tensioned transducer, turnbuckle, connecting rod (stainless steel, fiberglass or graphite), rod clamp, and a pair of stainless steel eyebolts.


Standard Ranges¹
12.5, 25, 50, 100, 150 mm
0.025% F.S.
±0.1% F.S.
<0.5% F.S.
Temperature Range¹
−20 °C to +80 °C
Transducer Lengths
varies with application

¹Other ranges available on request.

²Accuracy established under laboratory conditions.

Please Note: GEOKON maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.