First Coagulation Controller installation for Pi in South America
Following on from the success of numerous water treatment plants in the UK and Ireland, Pi is now beginning to offer the CoagSense coagulation controller to other countries in the
Online conductivity meters are common in today’s water treatment and process plants. ConductiSense is a stable, reliable, online conductivity meter for a reasonable cost.
The ConductiSense sensors and accessories are available with different controllers giving you the same great performance with different communication, display, and control options. With the ConductiSense range of Conductivity Monitors, you get everything that you need – and nothing that you don’t.
Our light industrial conductivity sensor utilises Graphite technology. The durable epoxy body construction provides a rugged and dependable sensor for potable water and clean water. Mount them in-line, in a pipe “T” fitting, or submerse them into a tank. For many applications, the epoxy body conductivity sensors are the lowest cost, most reliable conductivity sensor to use, especially for process applications. Rugged epoxy bodies make the sensors virtually unbreakable. These are an excellent choice to use as standard online conductivity electrodes in the water and related industries.
The toroidal inductive conductivity sensors features a wide measurement range and dependable toroidal technology over the range 0-2,000,000 μS/cm. Resistant to corrosion, coatings and fouling common to contacting conductivity sensors, this probe is designed for a trouble free and long service life. Noryl is the standard material of construction and has a wide solvent tolerance and temperature stability to 105°C. All models can be submersed by utilising the 3/4” NPT threads on the sensor or installed in 2” NPT tees for in-line deployment. A temperature sensor is built into the conductivity sensor for automatic temperature compensation.
A variety of stainless steel sensors are also available for high temperature applications. Please contact us for further information.
Document | Type | Size |
---|---|---|
ConductiSense | Brochure | 633kB |
Conductivity – Background and Measurement | Article | 1.5mB |
CRONOS® | Brochure | 712kB |
CRIUS® | Brochure | 733kB |
CRIUS® Remote Communications | Brochure | 669kB |
CRONOS® and CRIUS® Control Options | Technical Note | 649kB |
Remote Access GPRS | Technical Note | 593kB |
Conductivity is the measurement of the ionic species in a solution. It is defined as the conductance in a given volume. Conductance is the ability of the solution to conduct electric current.
Conductance is the ability of a solution to conduct electric current, while conductivity is the conductance in a given volume (usually measured in μΩ/cm or μS/cm).
Temperature has an effect on your conductivity measurement but all Pi Conductivity Sensors have a built-in temperature sensor and provide automatic temperature compensation.
No, all substances possess some conductive properties. Generally organic compounds (such as benzene, alcohols, and petroleum products) have very low conductivities, while metals have very high conductivities. Measuring the conductivity of highly flammable liquids is very risky.
Dissolved solids in a solution (TDS) contribute to the conductivity of that solution. Most people are happy to use a standard multiplier to convert conductivity to TDS (typically 0.65). This multiplier works for a NaCI solutions. Different solutions will have different multipliers.
Making your own standard will yield the most accurate results. This is done by making a mixture of salts in relative proportions that simulate the solution to be tested, then dissolving the mixture into distilled water. This should be done according to the following formula: 1 mg salt mixture/litre of distilled water = 1 ppm TDS, or in other words, X ppm TDS = X mg of salts + one litre of distilled water.
Remember that “X mg of salts” is the number of milligrams of a mixture of salt whose proportions simulate your test solution. An appropriate value for “X” is determined by the following rule:
Choose a ppm value for a calibrated solution as close as possible to the expected ppm values of the test solutions. If the ppm content of the test solution is expected to vary a great deal, it is best to choose a ppm value for the calibrated solution in the upper 1/3 of the TDS conductivity range.
There is no difference. Micromhos (µ℧/cm) is more common in the U.S., while microsiemens (μS/cm) is more common in Europe.
Clean electrodes with mild liquid detergent and/or dilute nitric acid (0.1 M) by dipping the sensor into solution and agitating for 2 to 3 minutes. Dilute HCl (hydrochloric acid) or H2SO4 (sulfuric acid) may also be used.
Rinse it in tap water when you are finished using it. You can store your electrode either wet or dry. If it is stored dry you will need to recondition the electrode before use.
Place the probe in a standard solution or tap water and have power running to the probe. Let the probe soak for 30 minutes to 1 hour unless otherwise specified.
The probe is the same for conductivity and salinity, but in a salinity meter a correction factor is applied to the reading. The correction factor takes the conductivity reading and converts it to ppm of a specific salt. The salt varies from manufacturer to manufacturer of standardised solutions. Some use NaCl while others use CaCO3.
Calibrate using a standard solution in the range of the samples you are testing. Place the probe in standard solution, condition, rinse the probe in second sample of standard solution, use a third sample of standard solution to calibrate, and then adjust on the analyser until the specified value is displayed. Recalibrate when you change ranges, or if readings seem to be incorrect.
The two types of conductivity sensor supplied by Pi are ‘Toroidal’ and ‘Graphite’. The ‘Toroidal’ sensor covers the higher ranges from 0 µS/cm to 2,000,000 µS/cm or more often expressed as 0 mS/cm to 2000 mS/cm. The ‘Graphite’ sensor covers the range from 0-5000 µS/cm. Within that range we use different range constants (K- factor) to make the sensor more suitable for different applications. If you are measuring in the range 0-100 µS/cm then you will need a K- factor of 0.1. If you are measuring in the range 0-1000 µS/cm then a K-factor of 1.
Oliver Riding
England & Wales
Bill Sykes
Scotland, Northern Ireland and Isle of Man
Click on the following for help
> Help with your application
> Technical help with your Analyser
> Help choosing a product
Following on from the success of numerous water treatment plants in the UK and Ireland, Pi is now beginning to offer the CoagSense coagulation controller to other countries in the
Chlorine analysers identical to those already installed on some of their customer’s sites in Lisbon, Portugal, were chosen by Pi’s distributor for Portugal and Spain, Izasa Scientific, as part of
Norwegian companies continue to innovate in many industries such as aquaculture and wastewater treatment, and Pi’s distributor has recently been exploring ways in which Pi’s technology can be applied to