How to Calibrate the Hach 2100Q Turbidimeter

The Hach 2100Q turbidimeter is a reliable and accurate instrument used to measure the turbidity of water. Turbidity is a measure of the cloudiness or haziness of a fluid caused by suspended particles. It is an important parameter in water quality monitoring as it can indicate the presence of contaminants or pollutants in the water. To ensure accurate and reliable measurements, it is essential to calibrate the turbidimeter regularly.

Model CL-810/9500 Residual Chlorine Controller
Range FAC/HOCL:0-10 mg/L, ATC TEMP:0-50℃
Accuracy FAC/HOCL:0.1 mg/L, ATC TEMP:0.1℃
Oper. Temp. 0~50℃
Sensor Constant Pressure Residual Chlorine Sensor
Waterproof Rate IP65
Communication Optional RS485
Output 4-20mA output; High/Low limit double relay control
Power CL-810:AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A
CL-9500:AC 85V-265V±10% 50/60Hz
Working Environment Ambient temperature:0~50℃;
Relative humidity≤85%
Dimensions CL-810:96×96×100mm(H×W×L)
Hole Size 92×92mm(H×W)
Installation Mode Embedded

Calibrating the Hach 2100Q turbidimeter is a simple process that involves adjusting the instrument to ensure that it provides accurate and consistent readings. Calibration is necessary to account for any changes in the instrument’s performance over time and to maintain the accuracy of the measurements. By following the proper calibration procedure, you can ensure that your turbidimeter is functioning correctly and providing reliable data.


To calibrate the Hach 2100Q turbidimeter, you will need a calibration kit that includes a set of standard calibration solutions with known turbidity values. These solutions are used to calibrate the instrument and verify its accuracy. Before starting the calibration process, make sure that the instrument is clean and free of any debris or contaminants that could affect the readings.


To begin the calibration process, first, turn on the turbidimeter and allow it to warm up for at least 15 minutes. This will ensure that the instrument is operating at a stable temperature and is ready for calibration. Once the instrument is warmed up, insert the calibration standard with the lowest turbidity value into the sample chamber and close the lid securely.

Next, select the calibration mode on the instrument and follow the on-screen instructions to calibrate the turbidimeter. The instrument will prompt you to adjust the calibration knob until the reading matches the known turbidity value of the calibration standard. Once the reading is stable and matches the expected value, the instrument is calibrated for that turbidity level.

Repeat this process for each calibration standard in the kit, starting with the lowest turbidity value and working your way up to the highest. Make sure to rinse the sample chamber with clean water between each calibration standard to prevent contamination and ensure accurate readings. Once all the calibration standards have been used, the turbidimeter is calibrated and ready for use.

After calibrating the Hach 2100Q turbidimeter, it is important to perform a verification check to ensure that the instrument is providing accurate and reliable measurements. This can be done by measuring a verification standard with a known turbidity value and comparing the reading to the expected value. If the reading is within an acceptable range of the expected value, the instrument is calibrated correctly.

In conclusion, calibrating the Hach 2100Q turbidimeter is a simple yet essential process to ensure accurate and reliable measurements of water turbidity. By following the proper calibration procedure and using standard calibration solutions, you can maintain the accuracy of the instrument and trust the data it provides. Regular calibration and verification checks are necessary to ensure the quality of the measurements and to meet regulatory requirements for water quality monitoring.

Model pH/ORP-810 pH/orp meter
Range 0-14 pH; -2000 – +2000mV
Accuracy ±0.1pH; ±2mV
Temp. Comp. Automatic temperature compensation
Oper. Temp. Normal 0~50℃; 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 96×96×100mm(H×W×L)
Hole Size 92×92mm(H×W)
Installation Mode Embedded

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