Beschreibung
The Apera Instruments TN400 provides fast and reliable measurements of the turbidity (turbidity) of liquids. The instrument is equipped with an infrared light emitting diode (860 ± 30 nm) and operates using a nephelometric 90° scattering method that complies with ISO 7027 and DIN EN 27027 standards for determining the turbidity of aqueous solutions. The large LCD with progress indicator and intuitive operating instructions in picture and text form make it user-friendly and easy to operate.
Technical Specifications
Technical Specifications
| Measuring method | Nephelometric method (90°) according to ISO 7027 / DIN EN27027 |
| Light source | Infrared LED（860±30nm） |
| Measuring range | 0 ~ 1000 NTU, automatic range selection: 0.01 ~ 19.99 NTU 20.0 ~ 99.9 NTU 100 ~ 1000 NTU |
| Accuracy | ≤ ±2% of reading ± stray light |
| Reproducibility | ≤ ±1% of reading or 0.02 NTU, whichever is greater |
| Resolution | 0.01 / 0.1 / 1 NTU |
| Stray light | ≤ 0.02 NTU |
| Calibration standard | 0, 20, 100, 400, 800 NTU AMCO Polymer or Formazin |
| Light detector | Silicon photocell |
| Measuring modes | Normal measurement and average measurement mode |
| Display | TFT color display |
| Measuring cells | ø25×60 mm, borosilicate glass with screw cap |
| Test volume | 18 ml |
| Energy supply | 4 × 1.5V AA batteries |
| Temperature range | 0-50°C（32˚F-122˚F） |
| Operating conditions | Temperature: 0 - 50°C；rel. Humidity: 0 - 90% at 30°C, 0 - 80% at 40°C, 0 - 70% at 50°C, no condensation |
| Storage conditions | Gauge: -40 to 60°C (-40 to 140°F) Calibration solutions: 5 to 30°C (41 to 86°F) |
| IP rating | IP67 |
| Quality and safety guidelines | CE / RoHS |
| Dimensions (W×L×H) /Weight | Meter: (90×203×80) mm/ 385 g Transport case: (310×295×110) mm/ 1.5 kg |
A complete set contains:
- TN400
- Calibration solutions (0.0 NTU, 20 NTU, 100 NTU, 400 NTU, 800 NTU)
- 6 sample cuvettes
- Silicone oil
- Screwdriver
- Microfiber cloth
- 4x AA battery
- manual
- Carrying case