Portable Laboratory Conductivity Sensor, 2~20000μs/cm

Factory price portable laboratory electrical conductivity sensor, measuring range 2~20000μs/cm, temperature range 0~80℃, temperature compensation element 2.25kΩ, connector uses five-core aviation interface. The portable laboratory conductivity sensor has a wide measuring range and is resistant to pollution. It is a good device for measuring larger conductivity.

Specification

Note: There is a loose platinum black layer on the surface of the platinum sheet. It should be avoided to come into contact with any objects. It is not suitable for measuring samples with high viscosity. Damage to the black platinum layer may cause deviation in the measurement data.

Features

• The portable laboratory conductivity transducer adopts glass shell material and is resistant to pollution.
• The two-electrode structure avoids polarization effects and is easy to use and maintain.
• The laboratory conductivity sensor uses platinum black electrodes and can be used to measure larger conductivity.

Dimension (Unit: mm)

Application

Tips: Conductivity sensor troubleshooting

• Unstable readings: Common causes of unstable readings include electrode contamination, uneven solution mixing, drastic temperature changes, or electrode aging and damage. When the electrode is contaminated, it needs to be rinsed with deionized water first. If there are still stubborn stains, they can be soaked in 0.1M nitric acid solution or ultrasonically cleaned, but it should be noted that platinum black electrodes are not suitable for ultrasonic treatment. Inadequate mixing of the solution will cause fluctuations in the measured value. At this time, a magnetic stirrer should be used for low-speed stirring, and bubbles should be avoided to interfere with the measurement. Drastic changes in ambient temperature will affect the conductivity value. Wait for the solution temperature to stabilize or enable the automatic temperature compensation function of the instrument. If the platinum black falls off, cracks, and other aging phenomena appear on the electrode surface, a new conductivity sensor needs to be replaced to ensure measurement accuracy.
• Large deviation in measured values: First, it is necessary to confirm whether the standard calibration solution used is fresh and valid, especially the KCl standard solution should be kept at 25°C or the actual temperature should be manually entered for calibration. Secondly, check whether the electrode constant is set correctly. Different electrodes have specific K value parameters, which need to be accurately set in the instrument. Incorrect setting of the temperature compensation coefficient can also cause deviations. In addition, DC measurement may cause electrode polarization. It is recommended to use an instrument with 1-3kHz AC measurement mode for detection.
• Unable to calibrate or calibration failure: If the standard calibration solution is contaminated or expires, calibration will fail. Use the newly opened standard solution and avoid storing it in metal containers. Long-term dry storage of conductivity sensors will degrade their performance. Improper calibration operation is also a common cause. It must be carried out strictly in accordance with the instructions to ensure that the electrode is completely immersed in the calibration solution and there are no bubbles attached to the surface, while maintaining a stable measurement environment temperature.
• Slow response or drifting readings: Slow response speed or continuous drifting readings often indicate that the electrode needs maintenance. Scaling on the surface of the conductivity sensor is one of the main reasons. For example, calcium carbonate deposits will seriously affect the response speed. It can be soaked in 5% dilute hydrochloric acid solution for 5 minutes and then rinsed thoroughly. For composite electrodes, the depletion of reference solution will lead to performance degradation, and the reference solution needs to be replenished or replaced in time.