Measurement of pH instrument

The measurement of Hydrogen Ion concentration in an aqueous liquid, which determines whether a liquid is neutral (7.0 pH), acid or alkali. pH is usually measured with a glass or plastic combination electrode which produces a millivolt potential proportional to the pH value that is amplified by the software inside the pH instrument to give an instantaneous value.

 

Measurement of Redox instrument

Typically used to determine the oxidizing or reducing potential (ORP) of a water sample solution being a measure of the tendency of a chemical species to acquire electrons from or lose electrons to an electrode and thereby be reduced or oxidised respectively, using a platinum tip electrode with the the value being presented millivolts (mV), the term Redox is derived from Reduction Oxidation and also be referred to as ORP (Oxidation ReductionPotential).

 

Measurement of Chlorine instrument

Used in many industrial applications as a disinfectant residual chlorine or free chlorine is the primary measurement for chlorine instrumentation, colorimeters typically detect chlorine in the range of 0 to 5 parts per million (ppm) a more sophisticated technique is based on the amperometric method with chlorine measured by a sensor probe containing the electrolyte potassium chloride (KCl).

 

Measurement of Conductivity instrument
Conductivity is the measurement of electrical conductance of all dissolved ionic species within a measured solution by determining the resistance of the solution between the conductivity electrode surfaces, used routinely in many industrial and environmental applications as a fast and inexpensive reliable way of measuring the total dissolved solids (T.D.S) content in a solution.

 

All controllers incorporate control relays as well as a (0) 4-20mA signal. Depending on which model of controller - these can be used to control a piece of control equipment such as a pump or solenoid valve. Often these pieces of control equipment can be controlled proportionally that is - causing the device to speed up, or dose faster / slower depending on the deviation from the desired set-point.

DC300 Instrument Controllers

| pH controller | Redox controller | Chlorine controller |

| Conductivity controller | Bromine controller | Chlorine dioxide |

DC200-B Instrument Controllers

| pH controller | Redox controller | Chlorine controller |

| Conductivity controller | Bromine controller | Chlorine dioxide |