Checker HC Handheld Colorimeter - Chromium VI

Item #: HI7-
Manufacturer: Hanna Instruments

Product Description

The Checker®HC is a simple, accurate, and cost effective way to measure low ranges of chromium VI in fresh water. Designed as a more accurate alternative to chemical test kits, the Checker®HC provides quick, accurate results in four easy steps. 

  1. Step One - Add a sample to the included cuvette(s)
  2. Step Two - Insert sample into the Checker and zero it out 
  3. Step Three - Remove sample and add reagent
  4. Step Four – Reinsert sample and click the button to measure your results or…
    Press and hold the button for 3 seconds for a time reaction reading

The reaction between chromium VI and the reagent causes a purple tint in the sample.


  • Small palm-sized design
  • Accurate from ±3 ppb ±5% of reading
  • Dedicated to a single parameter
  • Uses a single AAA battery
  • Auto Power Off after 10 minutes in inactivity
  • Built-in timer for timed reaction readings


Resolution 1 ppb
Accuracy @ 25°C/77°F ±5 ppb ±4% of reading
Light Source LED @ 525 nm
Light Detector silicon photocell
Method Adaptaion of the ATSM, Manual of Water and Enviornmental Technology, D 1687-92, Diphenylcarbohydrazide method
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 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight 64 g (2.25 oz.)