Electricity and Control April 2020

MEASUREMENT + INSTRUMENTATION : PRODUCTS + SERVICES

The world’s toughest liquid analysis systems Prei Instrumentation’s customers choose Turtle Tough sensors because they conduct liquid analytics in the toughest conditions. They operate in mining, precious metal and ore refinement and extreme chemical processes, where most sensors are unable to provide accuracy or longevity. Deterioration in the accuracy of sensors creates costly wastage as process control is affected. Additionally, in these extreme environments many sensors require intensive maintenance and frequent calibration, which are time-consuming and costly processes. Prei Instrumentation’s customers choose Turtle Tough because the sensors deliver on the promise of providing substantial cost savings through better sensor performance. As well as saving money, customers benefit from the simplified human involvement required to keep the process measurement systems running effectively. Turtle Tough sensors are designed to provide accurate measurement for significantly longer than any other sensor.

Custom-made to provide lower rates of expiration, slower accuracy degradation and reduced fouling, the sensors deliver tighter process control and the associated savings. All Turtle Tough pH, ORP (oxidation reduction potential), conductivity and ion selective measurement sensors have no serviceable components. This means completely maintenance-free operation – for the life of the sensor. Turtle Tough sensors are solid state and sealed for life, impervious to ingress. They will resist process contamination. There is no gel or electrolyte to be refilled, no reference to replace and no o-rings or seals to be compromised or replaced. Turtle Tough sensors offer significantly extended replacement intervals, reducing the time and manpower required to replace and install sensors. Rather than a one-size-fits-all approach, each sensor is optimised for its intended process use with various salt mixtures and polymer formulations. Prei Instrumentation’s proprietary pH glass andORP elements provide unmatched performance in harsh environments. By using solid-state conductive reference junction polymers the sensors ensure accurate measurement while resisting process contamination into the reference system. This ability to maintain high ionic conductivity while resisting aggressive gas intrusion is what makes the sensors outlast virtually all competitors in difficult process control conditions. Turtle Tough’s advanced, patented technology revolutionises liquid analysis. The full range of pH, ORP, conductivity, dissolved oxygen and ion specific sensors are designed to provide long life and high performance in the world’s toughest environments. Through decades of experience supplying sensors into such tough applications, Prei Instrumentation has developed sensors that are optimised for high hydrofluoric acid, saturated sodium, high sulphide, organic solvents, high cyanidation, ultrapure water, high temperature and slurry/viscous applications. Turtle Tough analysers The TT-MA analysers have been designed specifically to interface with the Turtle Tough sensors to provide maximum service life for the sensor. The modular design enables the user to create a multi-parameter analyser with any combination of different analytical modules, including pH, ORP, dissolved oxygen, conductivity and ion specific. Functional modules can also be added including digital MODBUS, data- logging and relays. The TT-MA analyser family is the most economical full-feature series of industrial analysers available. Turtle Tough sensors and analysers are sold and serviced by Prei Instrumentation, a company that has more than 30 years’ experience in liquid analysis applications, especially in tough environments. For more information contact Neville Jegels at Prei Instrumentation.Tel: +27 (0)11 867 5001, Mobile: +27 (0)71 202 0703