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Lab Expo Portable Turbidity meter 25-PTM102 measures turbidity from 0 to 400 NTU using the 90° scattered light method with an infrared-emitting diode at 850 nm and silicon photodiode detector. It features a microprocessor-based system with five-point calibration, stores up to 20 data sets, and offers USB output for data transfer. The device includes reset function, and supports GLP-compliant testing for water quality control in environmental, industrial, and laboratory settings where precise turbidity assessment is required for compliance monitoring or process optimization under ISO standards such as ISO 7 7 .
| Measuring range (NTU) | 0 to 100,100 to 400 |
| Minimum readout value (NTU) | 0.01, 0.1 |
| Calibration point | 5 |
| Sample volume | 5 to 10 ml |
| Principle method | 90° scattered light |
| Operating temperature | 5 to 40°C |
| Working temperature | 5 to 40°C |
| Light source | Infrared-emitting diode (850 nm λ) |
| Detector | Silicon photodiode |
| Error value | ± 6 % (± 2 % F.S) |
| Zero drift | ± 0.5 % F.S. |
| Reset functions | Yes |
| Memory | Stores up to 20 sets data |
| Output | USB communication interface |
| Power batteries | DC 1.5 V, 5 AA alkaline batteries |
| Power supply | AC 220 V, 50 Hz |
| Dimension | 370 × 260 × 150 mm |
| Weight | 1.5 kg |
FunctionImplementationField water testing5 to 10 ml sample volume enables on-site collectionLaboratory analysis0 to 100,100 to 400 NTU range supports low and high turbidity samplesQuality control labs±6% error value ensures measurement consistencyOutdoor operations-20°C to 60°C storage temperature allows environmental resilienceMulti-sample processingStores up to 20 sets data facilitates batch recording
| Accessory No. | Name | Quantity |
| 1 | Specimen bottle | 3 pcs |
| 2 | 400 NTU (Formazine) turbidity standard solution | 1 bottle |
| 3 | Power cable | 1 pc |
| 4 | Carrying box | 1 pc |
