There is perhaps no other sensor that we are more famous for than our TT-Ni-pH Nickel pH Sensor which has been used in Nickel extraction and refining process (HPAL) for more than 20 years.
Ammonia injection and solvent extraction are two critical components of nickel extraction in process environments. Dissolved gas ingress into the sensing elements of pH sensors is a common cause of premature sensor failure. Solvent extraction also presents some unique challenges to pH measurement, as the presence of organic solvents will dissolve many common materials of construction while the small water volumes in the extraction process frequently present very extreme pH measurements.
The TT-Ni-pH Nickel pH Sensor utilises special body plastics and sealants to resist solvent attack and our sensing elements are protected from dissolved ammonia gas ingress through a triple junction references and high impedance glass electrodes. Optionally, additional cable isolation can be added to provide more resistance to the electrical components of the sensors. The sensor is rated to above 150psi allowing the sensor to perform its task in high pressure acid leach and solvent extraction environments. Turtle Tough have developed a range of mating interfaces, including immersion, submersion and hot-tap assemblies to ensure you can obtain your process measurement right where it is needed, rather than just settling on an easy access point.