Hanna Instruments

Scientific Equipment

Safety Data Sheets

SDS search & quick download

Free Delivery

Most of mainland GB for orders over £50. Other charges may apply - see more

Hanna Care

We take the long view, looking after existing customers as much as delighting new ones!

Certificates of Analysis

Download a copy of the certificate of analysis for your solution

HI-701-25 Reagents for HI-701 Free Chlorine Pocket Checker

HI-701-25 Reagents for HI-701 Free Chlorine Pocket Checker

Hanna HI-701-25 Reagents for HI-701 Pocket Checker

HI-701-25 Reagents for HI-701 Free Chlorine Pocket Checker

25 Tests
Pink tint colour recognition
In Stock
£6.65 (exc. VAT) £7.98 (inc. VAT)
Replacement reagents for Free Chlorine pocket checker, 25 tests. The HI-701-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Free Chlorine Checker® HC.

HI-701-25 Reagents for HI-701 Free Chlorine Pocket Checker information

Hanna's extended description

The 25 pack of reagents is for use with the HI-701 Free Chlorine Pocket Checker.

These reagents follow the DPD Method in which the reaction between chlorine and reagent causes a pink tint in the sample. By simply adding the packet of HI-701-25 reagent, the reaction will take place and the HI-701 will determine the concentration from the colour that is produced. The results will be displayed in ppm (mg/L) of free chlorine. These reagents are designed to be used with samples that have an expected range of 0.00 to 2.50 ppm free chlorine.

Tip for an accurate measurement

It is important that the sample does not contain any debris.

Whenever the cuvette is placed into the measurement cell, it must be dry outside and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI-731318 or a lint-free cloth prior to insertion.

Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.

Do not let the reacted sample stand for too long after reagent is added, or accuracy will be lost.

After the reading, it is important to discard the sample immediately, otherwise the glass might become permanently stained.

Four steps. One click. Instant Readout.

1. ‘Zero’ the Checker®HC with your vial inside

2. Place a 10ml water sample into the vial and add your reagent

3. Place your vial into your Checker®HC

4. Press the button and read the results

Use HI-701-11 Calibration Check Set with the HI-701.


Specifications list


Package Sachets
Quantity 25 tests
Method Adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and the reagents causes a pink tint in the sample.
Website was easy to use & quick

I have been using the product for a while now and find the machine accurate & simple to use giving me good results quickly with these reagents - by Trusted Customer

Questions & Answers

Got a question to ask? Use this form to submit your question.
Question will be displayed after moderation.
Name* Product Question*
No questions yet?
Don 't be shy, be the first to ask.