LEADTEC’s pH and ORP sensors are made with various technologies to perform in all kinds of conditions. With standard size such as 3/4 inch and PG 13.5 or 12 mm, our sensors can be an alternative to many brands. The sensors are also available in bulb type and flat type. Besides general applications, LEADTEC’s pH and ORP sensors are specially designed for :

  • High temperature & high alkalinity
  • Hydrofluoric acid resistant
  • Low ionic strength solutions
  • Electriferous water


LEADTEC’s dependable free chlorine sensors feature two measurement technology:

  • Clark principle for wastewater application
  • Potentiostatic for clean or pure water application
In potentiostatic measuring, the electrodes’ potential is electrically controlled in relation to the liquid, providing a linear current / concentration relationship and a very stable zero value.


These dissolved oxygen sensors can measure up to 40.00 ppm and as low as 0.1 ppb which is useful for power plant, boiler etc. DO sensor for high temperature application where operating temperature is up to 130oC is available for process such as fermentation. LEADTEC’s Optical DO sensor is ideal for long term continuous deployments with zero maintenance and minimal calibration drift. Type of sensors available:

  • Electrochemical sensor
  • Optical sensor


LEADTEC offers wide variety of sensors suited to each application differently. From ultrapure water to process water or high temperature application, the bodies of the sensors are constructed with versatile plastics such as ABS and POM while the electrodes have titanium and stainless-steel designs. Type of sensors available:

  • 2 electrode conductivity sensors, ideal for pure and ultrapure water
  • 4 electrode conductivity sensors, ideal for process water and surface water
  • Optical inductive sensor


LEADTECOptical Turbidity Sensors are available in low range (0 – 100.0 NTU) or high range (0 to 4000 NTU).

These reliable sensors are deployed in various industries, range from pure water to surface water and urban wastewater. The range of the total suspended solids is measurable up to 50 gram/Litre. The design of the sensor has made it a good choice for sludge treatment also.


An Ion Selective Electrode (ISE) measures the activity of the specific ion in the solution and convert it to analogue signal. LEADTEC features combination electrode design to measure ion concentration in ppm. Designed with a rugged body, the sensors are readily deployed into any process. The ISE can be placed directly into the sample without sample pre-treatment or destruction of the sample.


Ammonium analysis has a significant interference from potassium (K+) ion, a very common element and occurs in relatively high concentration in most natural waters. LEADTEC’s solution to the ionic interference is; combined measurement of ammonium and potassium for K compensation.
Similarly, to avoid significant error in nitrate measurement, nitrate measurement will compensate with chloride measurement. The ammonium – potassium & nitrate – chloride can be ordered from LEADTEC in a combined sensor. The precision of these sensors is +/-1ppm. Ammonia and nitrate are frequently used in wastewater and a great tool to have in aquaculture.