AL-CARK Caustic Analyser

AL-CARK Caustic Analyser

Rugged Process Analysers for the Minerals Processing Sector (22) (25) (27)

This refractometer sensor features include:

  • Measures density of the liquor phase of a slurry – independent of suspended solids or mud
  • Extensive after sales service
  • Real-time and accurate
  • In-line measurements
  • Measure alumina caustic ratio
  • Reliance on lab sampling for caustic and A/C control is greatly reduced
  • Operators can respond immediately to process disturbances and have near immediate feedback of changes initiated
  • Closed loop feed back control for caustic liquor dilution loops is absolutely achievable

The sensor:

  • Uses a digital CCD array to detect light bend angle (critical angle) in the liquid phase of a solution
  • This angle is directly proportional to the density of the liquid phase
  • Use no moving parts, pots or dials and as the measurement is digital and all parts are fixed, it is completely free from signal drift
  • Method of critical angle detection is also immune to the effects of bubbles, suspended solids (up to 90% suspended solids), colour, vibration, flow, temperature and viscosity
  • Is installed directly in the process piping or sidestream. We angle-mount the sensor to reduce the effects of erosion
  • We implement and maintain a flow velocity above 1.5 meters per second and we do not experience scaling on any installation.
  • Prism washing systems available for solids free or low velocity applications

Precision Light and Air Offices

Precision Light and Air Australia (Head office)

PO Box 73
Seaford Vic 3198
Phone: +61 3 9786 1711

Precision Light and Air North America (sales office)

Contact: Patrick Morgan
Phone: +1 876 381 0125
Fax: +1 876 963 0313

Nanjing Precision International Corp

Contact: Matt Chen
Level 6, Unit 2, Building 21
Yangzi Kechuang Headquarte
5 Pudong North Rd, Pukou District, Nanjing
P.R.China. 210031
Phone: +86 139 0515 8762


Utah and Surrounding States

Process Technology
4084 South 300 West
Salt Lake City, Utah 84107

South America: AS-Chile

Contact: Ruben Morales Aravena
Telefono: +56 2 277 7480


Yellow Solutions
Office phone: +55 19 3648 0592
Office address: Rua Peru, nº 636, Sala 902 – Ed. Win Office Tower - Americana – SP
Web address:


Contact: Sergio Burelli
Phone: +27 (0) 11 568 2092
7 Sam Green Road
Tunney, Germiston 1401, South Africa