Understanding the Functionality of a conductivity meter

Conductivity meters are essential tools used in various industries to measure the ability of a solution to conduct electricity. This measurement is crucial in determining the purity and concentration of a solution, as well as monitoring the overall quality of water in different applications. Understanding the functionality of a conductivity meter is key to utilizing this instrument effectively.

Conductivity meters work on the principle that ions in a solution carry an electric charge, and the ability of these ions to move freely through the solution determines its conductivity. When a conductivity meter is immersed in a solution, an electric current is passed through the electrodes, and the meter measures the resistance to this current. The higher the concentration of ions in the solution, the higher the conductivity, and vice versa.


One of the key components of a conductivity meter is the electrodes. These electrodes are typically made of materials such as platinum, graphite, or stainless steel, which are good conductors of electricity. The electrodes are immersed in the solution being tested, and the conductivity meter measures the resistance between these electrodes. The conductivity meter then converts this resistance into a conductivity value, which is typically displayed in units of Siemens per centimeter (S/cm) or microsiemens per centimeter (µS/cm).

Model pH/ORP-510 pH/orp meter
Range 0-14 pH; -2000 – +2000mV
Accuracy ±0.1pH; ±2mV
Temp. Comp. Manual/Automatic temperature compensation; No Comp.
Oper. Temp. Normal 0~60℃; High temp 0~100℃
Sensor pH double/triple sensor; ORP sensor
Display LCD Screen
Communication 4-20mA output/RS485
Output High/Low limit dual relay control
Power AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A
Working Environment Ambient temperature:0~50℃
Relative humidity≤85%
Dimensions 48×96×100mm(H×W×L)
Hole Size 45×92mm(H×W)
Installation Mode Embedded

Calibration is an important aspect of using a conductivity meter. Calibration ensures that the meter is providing accurate and reliable measurements. Conductivity meters can be calibrated using standard solutions with known conductivity values. By immersing the electrodes in these standard solutions and adjusting the meter accordingly, users can ensure that the meter is providing accurate readings.

Conductivity meters are used in a wide range of applications, including water quality testing, environmental monitoring, food and beverage production, pharmaceutical manufacturing, and chemical processing. In water quality testing, conductivity meters are used to measure the total dissolved solids (TDS) in water, which is an indicator of water purity. In food and beverage production, conductivity meters are used to monitor the concentration of salts and other dissolved solids in various products. In pharmaceutical manufacturing, conductivity meters are used to ensure the quality and consistency of pharmaceutical products. In chemical processing, conductivity meters are used to monitor the concentration of chemicals in various processes.

Product name pH/ORP-8500A transmitter controller
Measurement parameter Measurement Range Resolution ratio Accuracy
pH 0.00~14.00 0.01 ±0.1
ORP (-1999~+1999)mV 1mV ±5mV(Electric meter)
Temperature (0.0~100.0)℃ 0.1℃ ±0.5℃
Temperature range of Tested solution (0.0~100.0)℃
Temperature component NTC10K thermal element
(4~20)mA Current output Channel No. 2 channels
Technical characteristics Isolated, fully adjustable, reverse,
configurable, instrument / transmitting dual mode
Loop resistance 400Ω(Max),DC 24V
Transmission accuracy ±0.1mA
Control contact Channel NO. 3 Channels
Electric contact Semiconductor photoelectric switch
Programmable Each channel can be programmed and point to (temperature, pH/ORP, time)
Technical characteristics Presetting of normally open /normally closed state / pulse /PID regulation
Load capacity 50mA(Max)AC/DC 30V
Data communication MODBUS, RS485 standard protocol
Working power supply DC 24V±4V
Overall power consumption <5.5W
Working environment Temperature: (0~50) ℃
Relative humidity: ≤ 85%RH (non condensing)
Storage environment Temperature: (-20~60) ℃
Relative humidity: ≤ 85%RH (non condensing)
Protection level IP65 (with back cover)
Shape size 96mm×96 mm×94mm (H×W×D)
Opening size 91mm×91mm(H×W)
Fixed mode Panel mounting type quick fixed

In conclusion, conductivity meters play a crucial role in various industries by measuring the ability of a solution to conduct electricity. By understanding the functionality of a conductivity meter and how it works, users can effectively utilize this instrument to monitor the quality of water, food, pharmaceuticals, and chemicals. Calibration is essential to ensure accurate measurements, and conductivity meters are used in a wide range of applications to ensure product quality and consistency. Conductivity meters are valuable tools that provide valuable insights into the composition and quality of solutions, making them indispensable in modern industry.

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