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.

Specifications
Standard Ranges¹ 12.5, 25, 50, 100, 150 mm 
Resolution  0.025% F.S. 
Accuracy ±0.1% F.S. 
Nonlinearity  <0.5% F.S. 
Temperature Range −20°C to +80°C 
Transducer Lengths² 360, 360, 508, 838, 1260 mm

Geokon, Incorporated, 48 Spencer Street, Lebanon, New Hampshire, 03766 · USA. Tel.: 1(603)448-1562, FAX: 1(603)448-3216, e-mail: info@geokon.com