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HI-720

The HI-720 Calcium Hardness Checker is a simple, accurate and cost effective way to measure low ranges of calcium in water.Checker®HC is supplied with reagents for 25 tests. Use code HI-720-25 (25 tests) for future purchases.

0.00 to 2.70ppm

£67.50 (exc.VAT)
£81.00 (tax incl.)
Order now for 2 weeks delivery
Full Description Specification Manuals

The HI-720 Calcium Hardness Checker is a simple, accurate and cost effective way to measure low ranges of calcium in water.

Designed as a more accurate alternative to chemical test kits, the HI-720 provides quick, accurate results in four easy steps.

HI-720 uses an adaptation of the standard methods for the Examination of Water and Wastewater, 18th edition, Calmagite method. The reaction between calcium and the reagents cause a reddish-violet tint in the sample.

Ideal for

  • Water purification systems
  • Heating and cooling systems
  • Drinking water
  • Wastewater
  • Plating

Key features

  • Small palm-sized design
  • Accurate from ± 0.20 ppm ±5% of reading
  • Dedicated to a single parameter
  • Auto power off after 10 minutes of inactivity
  • Built-in timer for timed reaction readings

Order Information

The HI-720 Calcium Hardness Checker is supplied with sample cuvettes with caps (2), calcium hardness reagent starter kit x 25 (re-ordering information HI-720-25 x 25 tests), syringes with tips (2), plastic beaker, battery, instructions and quick start guide.

Also available: Calibration set HI-720-11.

Four steps. One click. Instant Readout.

Step 1  1. ‘Zero’ the Checker®HC with your vial & water sample inside

Step 2  2. Take the vial out and add your reagent

Step 3  3. Place your vial into your Checker®HC

Step 4  4. Press the button and read the results

Use reagents HI-720-25 for HI-720 Calcium Hardness Handheld Colorimeter -Checker®HC x 25 tests

Use Calibration Set HI-720-11 for HI-720 Calcium Hardness Colorimeter - Checker®HC

Read More

Range0.00 to 2.70 ppm
Resolution0.01 ppm (mg/L)
Accuracy (@ 25°C)± 0.20 ppm ± 5% of reading
Light SourceLED @ 525 nm
Light DetectorSilicon photocell
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type(1) 1.5V AAA
Auto-offAfter 10 minutes of non-use
Dimensions81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
Weight64 g (2.25 oz.)
Methodadaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, Calmagite method. The reaction between calcium and reagents causes a reddish-violet tint in the sample

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