Digital Turbidity Meter Manufacturer,Supplier and Exporter in India
Product Code : EL-TM-2204
Jlab Export is a leading Digital Turbidity Meter Manufacturer,and suppliers in India
Cloudy water scatters light, and this meter measures how much. A tungsten lamp shines into a 30 mm glass test tube of sample. A photodiode set at a right angle to the beam picks up the light scattered by suspended particles. The signal is amplified and shown in NTU on a 3½ digit LED display. Drinking water and sewage testing are its usual work.
Specifications
| Principle | Light scattered at a right angle, picked up by a photodiode |
| Range versions | 0–1000 NTU in 4 ranges (0–2, 20, 200, 1000 NTU) or in 2 ranges (0–200, 1000 NTU); nephelometer version 0–200 NTU in 2 ranges (0–20, 200 NTU) |
| Resolution | 0.01 NTU (4-range and nephelometer versions), 1 NTU (2-range version) |
| Accuracy | ±3% FS ±1 digit (turbidity versions), ±2% FS ±1 digit (nephelometer version) |
| Display | 3½ digit 7-segment LED |
| Light source | 6 V, 0.3 A tungsten lamp |
| Sample holder | 30 mm clear glass test tubes |
| Power | 230 V ±10% AC, 50 Hz |
| Dimensions | 245 x 260 x 125 mm (approx.) |
| Supplied with | Set of 5 test tubes, dust cover and operation manual |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Water Clarity Experiments for Students
A classic exercise is the jar test for treating muddy water. Students stir Potash Alum into one sample, leave a second untreated, and read the clear upper water of each as the floc settles. The treated sample clears much faster, which shows how coagulation works in a water treatment plant.
Filtration makes a second comparison. The class pours the same muddy water through a Qualitative Filter Paper 90 mm held in Funnels Long Stem and reads it before and after. A dilution series of a clay suspension then shows the NTU value rising in step with the amount of suspended matter.
Frequently Asked Questions
What does NTU mean?
NTU stands for nephelometric turbidity unit. Nephelometric means the scattered light is measured at a right angle to the beam, which is how this meter places its photodiode. A higher NTU value means cloudier water.
Which range version should I order?
The four-range version reads from 0–2 NTU up to 0–1000 NTU in 0.01 NTU steps, so it covers clean drinking water and sewage. The two-range version reads 0–200 and 0–1000 NTU in 1 NTU steps. The nephelometer version covers 0–20 and 0–200 NTU in 0.01 NTU steps.
Why do readings change from one tube to the next?
Scratches, fingerprints, drops of water on the outside and air bubbles in the sample all scatter light and add to the reading. Wipe each tube clean and dry, let bubbles rise before reading, and keep to one tube for a series.
How is the meter standardised?
Set it with a turbidity standard of known NTU in a clean test tube, choosing a standard close to the values you expect. Formazin and ready-made polymer standards are the usual choices. Check the setting again before each batch of samples.
Should the sample be mixed before reading?
Yes. Turn the stoppered tube over gently a few times to lift settled particles back into suspension, then read promptly. Shaking hard traps bubbles, which make the reading too high.
Other Water Testing Items
- Turbidity Meter
- Microprocessor Dissolved Oxygen Meter
- Digital Salinity Meter
- Testing Drinking Water (test strips for pH, hardness and chlorine)
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Last updated: 6 November 2026