TN420 White light turbidimeter


Plus 19% MwSt. DE
SKU: 28APE190372 / AI482 Categories: , , , ,

The Apera Instruments TN420 provides fast and reliable measurements of the turbidity (turbidity) of liquids. The instrument is equipped with a tungsten filament lamp and operates via a 90° nephelometric scattering method that is consistent with U.S. EPA 180.1 method for determining turbidity in drinking, ground, surface, and saline waters, as well as in domestic and industrial wastes. The large LCD with progress indicator and intuitive operating instructions in picture and text form make it user-friendly and easy to operate. It is suitable for use on site or in the laboratory.

  • Performs accurate, fast and reliable turbidity measurements
  • Large TFT color screen with clear on-screen instructions for easy operation
  • EPA-certified, non-toxic, and easy-to-use AMCOClear® polymer standard solutions.
  • Waterproof housing according to IP67 enables application in outdoor use e.g. for drinking water analysis, environmental monitoring, etc.
  • Convenient storage and transport in case together with calibration solution, sample vials and accessories

The TN420 is ISO9001:2015 and CE certified and has a 2 year warranty.

Technical Specifications

Measuring method U.S. EPA 180.1 compliant nephelometric method (measurement of scattered radiation from white light at 90°)
Light source Tungsten incandescent lamp (400nm – 600nm)
Measuring range 0 to 1000 NTU (FNU), automatic range selection:

0.01 to 19.99 NTU (FNU)

20.0 to 99.9 NTU (FNU)

100 to 1000 NTU (FNU)

Accuracy ≤ ±2% of the measured value ± stray light
Reproducibility ≤ ±1 % of reading or 0.02 NTU (FNU) (whichever is greater).
Resolution 0.01 / 0.1 / 1 NTU (FNU)
Stray light ≤0.02 NTU (FNU)
Calibration standard 0, 20, 100, 400, 800 NTU (FNU) AMCO Polymer or Formazin
Light detector Silicon photocell
Measuring modes Normal measurement and average measurement
Display TFT color display
Measuring cells ø25×60 mm, borosilicate glass with screw cap
Test volume 18 ml
Energy supply 3.7V rechargeable lithium battery
Operating conditions Temperature: 0 – 50 °C (32 °F – 122 °F); rel. Humidity: 0 – 90% at 30°C, 0 – 80% at 40°C, 0 – 70% at 50°C, no condensation

Storage conditions Instrument: -40 to 60 °C (-40 to 140 °F)

Calibration solutions: 5 to 30 °C (41 to 86 °F)

Housing protection class IP67
Security certificate CE and RoHS
Dimensions and weight Meter: (90×203×80) mm/ 385 g

Complete set: (310×295×110) mm/ 1.5 kg

scope of delivery

A complete set contains:

  • TN420 Turbidimeter
  • AMCOClear® calibration solutions (0 NTU, 20 NTU, 100 NTU, 400 NTU, 800 NTU)
  • 6 sample cuvettes
  • 10ml silicone oil
  • Microfiber cloth
  • Screwdriver
  • manual
  • Carrying case


German TN420 DE
English TN420 EN