Portable Turbidity Meter, Nephelometric 90°
Battery-powered field turbidity meter working by the nephelometric method at 90° over 1 to 1100 NTU, with formazin calibration and a carrying case as standard.
Typical applications
- Field turbidity surveys
- Drinking water spot checks
- Effluent discharge monitoring
- River and lake sampling
- Water treatment plant rounds
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Worth knowing before you order
This is the field version of the bench turbidity meter, and the two differ in the numbers that matter: the portable is specified at ± 3% and tops out at 1100 NTU, while the bench model reads to 2000 NTU at ± 5%. Anything above 1100 NTU has to be diluted, which brings its own error. Unlike the bench model, the measuring principle is stated plainly — nephelometric, 90° — but no published turbidity method is cited on the page. Three formazin standards (200, 500 and 1000 NTU) come with it and the 0.02 and 10 NTU low points do not; formazin has a shelf life. The vial optical surfaces decide the reading, so the supplied wiping cloth and clean, matched vials matter as much as the meter. It runs on 3 AA cells and carries no separate battery-life figure on this page.Specification
| Principle | Nephelometric method, 90° detection |
|---|---|
| Turbidity measuring range | 1–1100 NTU / 0–275 EBC / 0–9999 ASBC |
| Display resolution | 0.01 (1–99 NTU), 0.1 (100–999 NTU), 1 (1000–1100 NTU) |
| Measurement accuracy | ± 3% |
| Turbidity units | NTU, FNU, EBC, ASBC |
| Calibration | 2 to 5 points using formazin standards (0.02, 10, 200, 500, 1000 NTU) |
| Calibration standard values supplied | 200, 500, 1000 NTU |
| Light source | Infrared light-emitting diode, 850 nm |
| Detector | Silicon photoelectric |
| Stray light | < 0.02 NTU |
| Vial size / sample volume | 60 mm high x 25 mm diameter / approx. 30 ml |
| Measurement modes | Single measurement with automatic end-point lock; continuous mode for indexing or matching vials |
| Data storage | 100 readings |
| Auto power off | Yes, after 15 minutes if not in use |
| Ambient temperature | 10–40 °C |
| Interface | USB |
| Power supply | 3 x AA cells or DC 5 V power adapter |
| Carrying case | Standard supply |
| Packing dimensions (L x W x H) | 290 x 90 x 240 mm |
| Gross weight | 1 kg |
Support available
- Calibration
- Operator training
- Spares & consumables
Calibration is arranged through NABL-accredited laboratories under the relevant scope. We state the scope and the certificate number on the quotation — see what accreditation actually covers.
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