Skip to content
Come to our Bacon, Coffee and Koi Event on 23 October! >>
Come to our Bacon, Coffee and Koi Event on 23 October! >>

HANNA Colour of Water Handheld Colorimeter


True colour is caused by dissolved compounds in water. It can be natural or artificial. Dissolved and suspended solids (together) cause apparent colour.

Other harmless constituents of water such as tannins, iron and manganese, may also be present and impart colour. The HI-727 reports the colour of water from 0-500 PCU (Platinum Cobalt Units).

Ideal for

  • Water testing
  • Quick on the spot analysis
  • Water Quality, Environmental, Education

Key features

  • Accurate and easy to use
  • Diphenylcarbohydrazide method
  • Accuracy ±10 PCU ±5% of reading
  • 5 PCU resolution
  • Designed to work with Hanna reagents
  • Large easy to read digits
  • Auto shut-off
  • Fits into palm and pocket


Supplied with

  • 2 sample cuvettes with caps
  • 1 x 1.5V AAA battery
  • Instructions


Also available: Hi-727-11 Calibration Set.

Battery powered – Allows use away from a power source. Batteries are included with all battery operated products.

Use Calibration Check set HI-727-11 with the HI-727 Colour of Water Handheld Colorimeter Checker®HC


Specifications list


Range 0 to 500 PCU
Resolution 5 PCU
Accuracy @ 25°C ±5% of reading ±10 PCU
Light Source LED @ 470 nm
Light Detector silicon photocell
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type (1) 1.5V AAA
Auto-off After ten minutes of non-use
Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)
Weight 64 g (2.25 oz.)
Method adaptation of the Standard Methods for the Examination of Water and Wastewater, 21th edition, Colorimetric Platinum Cobalt method