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Hanna Instruments HI 770 Checker HC Handheld Colorimeter for High Range Silica Testing is no longer available.

  • Easier to use and more accurate than chemical test kits
  • Adaptation of EPA Diazotization method
  • Range: 0 to 200 ppm. ±2 ppm ±5% of reading accuracy
  • Dedicated to a single parameter
  • Designed to work with Hanna Instruments' powder reagents
  • Uses 10 mL glass cuvettes
  • Large, easy to read digits
  • Auto shut off
  • Ideal for aquaculture
  • All size, big convenience
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Hanna Instruments HI770 Shown
Product Information
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Silica is the name given to silicon dioxide, SiO2. Silicon, Si, is the most abundant element in the Earths crust, 28% of it by weight. Silicon is never found free form in nature. In crystallized form it is only reactive under conditions of extremely high temperatures. Water and water vapor probably have little influence upon silicon solubility, because a protective surface layer of silicon dioxide is rapidly formed. Silicon binds with other elements to form various species of silica and silicate. The concentration of the soluble silica molecules are important to aquaculture because they influence (and limit) the growth of diatoms. In most waters, the predominant form of dissolved silica is monosilicic acid, which incorporates 2 water molecules.

The Hanna Instruments HI770 Checker HC is accurate and affordable. This portable handheld colorimeter features a resolution of 1 ppm (200 points) and ±2 ppm ±5% of reading accuracy. The contoured style of the HI 770 Checker HC fit in your palm and pocket perfectly and the large LCD is easy to read. The auto shut off feature assures the battery life will not be drained if you forget to turn it off.

The Hanna Instruments HI 770 Checker HC is simple to use. First, zero the instrument with your water sample. Next, add the reagents in order, respecting all the indications. Last, place the vial into the Checker HC, press the operational button for about 3 seconds and the display will show the countdown prior to the measurement or, alternatively, wait for 2 minutes after last reagent adding and press operational button. The Checker HC displays concentration in ppm of Silica as SiO2.

Ordering Information
Model Description Buy Online Price
HI770  Hanna Instruments HI 770 Checker HC Handheld Colorimeter for High Range Silica Testing Not Available
Included Accessories
  • 2 - Sample Cuvettes with Caps
  • 6 - Powder reagents for High Range Silica Testing
  • 1 - 1.5V AAA Battery
  • 1 - Instruction
Optional Accessories
Cleaning Solutions
HI93703-50 Hanna Instruments HI 93703-50 Cuvette Cleaning Solution for the HI 93703 Series Not Available
HI770-11 Hanna Instruments HI 770-11 Calibration checking set for HI 770 HR Silica Checker HC, 000 ppm Not Available
HI770-25 Hanna Instruments HI 770-25 Reagents for HI 770 HR Silica Checker HC, 25 tests Not Available
Cleaning Tools & Replacement Parts
HI731318 Hanna Instruments HI 731318 Non-abrasive Cuvette Cleaning Cloth, Pack of 4 Not Available
HI731321 Hanna Instruments HI 731321 Glass Cuvette Set for HI 83 series photometers and turbidimeters Not Available
HI731325 Hanna Instruments HI 731325 Cuvette Cap Turbidity Meters & HI 937xx Series Meters Not Available