Silica High-Range Checker – HI770

The Hanna Silica High-Range Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine ion concentration. Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars. The Hanna Silica High-Range Checker® uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.

  • Compact, Portable Design
  • Built-in Timer
  • One-Button Operation


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The HI770 Checker® HC (Handheld Colorimeter) provides a simple, accurate, and cost-effective way to measure silica. Silica is found in all natural surface and saline waters in the dissolved form. Due to the potential to cause scaling, it is undesirable and therefore monitored in industrial applications, and heating and reverse osmosis systems. Designed as a more accurate alternative to chemical test kits, the HI770 provides quick, easy, and accurate results.


Features at-a-glance:

  • Easier to use and more accurate than chemical test kits
  • Dedicated to a single parameter
  • Small size, big convenience
  • Ideal for: Water Quality, Environmental, Industrial, Aquariums



NameSilica High-Range Checker® HC – HI770
Silica Range0 to 200 ppm
Silica Resolution1 ppm
Silica Accuracy±2 ppm ±5% of reading
Silica Methodadaptation of the USEPA method 370.1 for drinking, surface and saline waters and Standard Method 4500-SiO₂ C for domestic and industrial waters.
Photometer/Colorimeter Light SourceLED @ 470 nm
Photometer/Colorimeter Light Detectorsilicon photocell
Battery Type/Life(1) 1.5V AAA
Automatic Shut-Offafter ten minutes of non-use
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight64 g (2.25 oz.)
Dimensions81.5mm x 61mm x 37.5mm (3.2 in. x 2.4 in. x 1.5”)

Additional information

Weight.4 kg
Dimensions19.5 × 12.5 × 6.5 cm


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