Reg. No CK 91/03521/23

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MEMBERS: R.K. Holloway  P.Newton

Postal:  PO Box 73892, Fairland, 2030, South Africa

VAT Reg. No: 4740121910

Physical: Drostdy Street, Cleveland, Johannesburg

TEL: (+27  011) 622 5448

E-mail:   qualitec@global.co.za

FAX: (+27  011) 622 7493

Web: www.qualitec.co.za


Designed for measurement of convergence in mines.


Operating principle: -

The instrument, which is portable, measures convergence between hanging and foot-wall.

The Convergence metre is a tool for quantifying closure.

A 10 turn potentiometer is fitted with a bobbin and stainless steel PVC covered wire. Changes in movement are determined by measuring resistance on the potentiometer. Readings can be taken by either a simple multi-meter or by a data logger. Minimum measuring range is 200mm to about 2000mm.


Features: -

  1. Simple, reliable and easy to read.
  2. Intended for relative measurements only. Temperature may change measurements.
  3. Meter made from stainless steel and nylon corrosion resistant materials. Potentiometer sealed with “O” rings.
  4. Supplied with stainless steel mounting bracket.
  5. Calibration curve supplied with each meter.
  6. “Bourns” 10 turn wire-wound potentiometer fitted with extended shaft and return spring.
  7. Supplied with 3-pin Canon socket and plug.
  8. List Price R8 565, 00 plus VAT (valid until End May 2017).

(1) Stainless steel end plates and bracket   (2) Canon plug and socket   (3) Nylon body

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