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Free Chlorine

You are here : Home | Spares & Parts | Water Testing Equipment Water Testing Instruments | Single Parameter Checkers | Free Chlorine

Single Parameter Check - Free Chlorine

  • Handheld Colorimeter
  • Free Chlorine CheckEasier to use and more accurate than chemical test kits EPA approved DPD method
  • ±0.03 ppm ±3% of reading accuracy
  • 0.01 ppm resolution
  • Large, easy-to-read digits
  • Auto shut off
  • Dedicated to a single parameter Designed to work with Hanna’s powder reagents
  • Small size, big convenience The Checker®HC easily fits into the palm of your hand or pocket
  • Use for quick and accurate on-the-spot analysis
  • Single-button operation: zero and measure

Ideal for:

  • Swimming pools and spas
  • Fruit and vegetable sanitation
  • Disinfection
  • Drinking water and quality control checks

The HI701 Checker®HC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution, while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The Hanna HI701 Checker®HC is accurate and affordable.

This Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm and ±0.03 ppm ±3% of reading accuracy. It also uses an EPA approved DPD method.

The contoured style of the Checker®HC fits 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 HI701 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Checker®HC, press the button and read the results. It’s that easy.


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Range0.00 to 2.50 ppm
Resolution0.01 ppm
Accuracy @ 25°C/77°F±0.03 ppm ±3% 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 two 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 USEPA method 330.5, DPD method