Checker HC Handheld Colorimeter - Silica Low Range

Item #: HI705
Manufacturer: Hanna Instruments
from: $49.00 sale: $40.18
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Product Description

The Checker®HC is a simple, accurate, and cost effective way to measure low ranges of silica. 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. Add reagent “A” and “B”

2.) Step Two - Insert sample into the Checker and zero it out

3.) Step Three - Remove sample and add reagent “C”

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 NDHI 705 uses an adaptation of the ASTM D859 method of heteropoly blue method. The reaction between silica and reagents causes a blue tint in the sample.


  • Small palm-sized design
  • Accurate from ±0.03ppm ± 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


Range 0.00 to 2.00 ppm  
Resolution 0.01 ppm  
Accuracy (@25°C/77°F) ±0.03ppm ± 5% of reading  
Measurement Method Colorimetric  
Light Source Photodiode @610 nm  
Method Adaptation of the ASTM D859 method of heteropoly blue method  
Light Detector Silicon photocell  
Power Supply Auto off after 10 min. of inactivity  
Environment Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing  
Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)  
Weight 64 g (2.25 oz.)