What do you know about a Conductivity Meter? Well, it is a very useful device for managers and engineers who work with water. In this article, I am going to answer frequently asked questions about the Conductivity Meter. Let’s get started!
* What is a Conductivity Meter?
This device is used for measuring conductance or electrical current in a solution. Why people measure conductance? Well, this value is useful in determining the health of a water body (natural or man-made.) It is a way to measure changes in water treatment plants.
* How it works?
This handheld device is equipped with a probe. Inside the probe, two electrodes are there, and the meter applies a voltage between the two electrodes. When the probe is immersed in the solution that you want to measure, a drop in voltage occurs due to the electrical resistance of the solution. The Conductivity Meter then converts this voltage drop into the units of conductance. The conductance indicates the TDS, which is the total dissolved solids in the solutions.
* Conductivity vs conductance?
Well, people get confused about the two. It is not rocket science, though. The ability of the solution that is being measured to conduct electric current is called conductance. The measurement of electrolytes of the solution that is being measured is the conductivity. Two equations are there to calculate the conductivity of a solution:
1) Conductivity = Electrical Current/Voltage x Distance/Area.
2) Conductivity = Conductance x Probes cell constant (K).
* Effects of temperature on the Conductivity Meter?
Well, we can’t give an exact answer to this question. I mean, it depends on the solution that is being measured. For solutions with a low ionic strength, the effect is very high. As a general rule, a 2% change will be there for 1 Celsius increase of the temperature. If you have a modern Conductivity Meter; the device will compensate the change.
* TDS and salinity?
The amount of dissolved salt in a solution is called the salinity. For example, sea water has a lot of salts dissolved in it. Freshwater bodies, on the hand; has lower salinity levels than sea water. A Conductivity Meter has an option to measure salinity as well.
* Conductivity vs TDS – the relationship?
The conductivity of a solution depends on minerals, salts, and gases dissolved in it. Which means by measuring conductivity, you can get a clear picture of TDS in the solution.
* Is the Conductivity Meter expensive?
You can buy a meter for commercial and industrial applications for $250. Cheaper ones are there, but the accuracy of cheap devices is doubtful.
* Conductivity Meter calibration?
Yes, calibrating the device regularly is advisable for accurate readings. Follow the instructions given by the manufacturer on calibrating the meter.
What do you think now? Well, you don’t need a Conductivity Meter for your home unless you are too worried about water quality. Of course, you can buy a meter for your home ($250 is not big money.) Anyway, it’s a must-have device for aquarium owners. TDS of water have direct effects on creatures living in it. Buy a meter that compensates for temperature changes. Well, don’t buy analog devices (digital ones are easy-to-read and give accurate readings.)Follow this link to see a handheld digital Conductivity Meter (https://www.palintest.com/application/files/9114/5571/8956/PT_1340_-_Micro_800_Conductivity_Meter.png.)