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British Wildlife

8 issues per year 84 pages per issue Subscription only

British Wildlife is the leading natural history magazine in the UK, providing essential reading for both enthusiast and professional naturalists and wildlife conservationists. Published eight times a year, British Wildlife bridges the gap between popular writing and scientific literature through a combination of long-form articles, regular columns and reports, book reviews and letters.

Subscriptions from £33 per year

Conservation Land Management

4 issues per year 44 pages per issue Subscription only

Conservation Land Management (CLM) is a quarterly magazine that is widely regarded as essential reading for all who are involved in land management for nature conservation, across the British Isles. CLM includes long-form articles, events listings, publication reviews, new product information and updates, reports of conferences and letters.

Subscriptions from £26 per year
Wildlife Survey & Monitoring  Aquatic Survey & Monitoring  Water Testing  Water Testing Meters

Chlorine Pocket Checker

Manufacturer: Hanna Instruments
Chlorine Pocket Checker
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  • Chlorine Pocket Checker Free Chlorine Pocket Checker Not in stock: Usually dispatched within 4 days
  • Chlorine Pocket Checker Total Chlorine Pocket Checker Not in stock: Usually dispatched within 4 days
Selected product: £81.66
About this product Specification Customer reviews Related products

About this product

With the Hanna Free Chlorine Checker you can check for chlorine at the touch of a button and get instant results.

Chlorine is the most commonly used water disinfectant chemical and is used in wastewater treatment plants and swimming pools as well as in both industrial and laundry bleaches. As such it can be very prevalent in natural water systems. Free chlorine is very toxic to fish and aquatic organisms, even in fairly low concentrations. However, once added to water it quickly reacts with other substances to form combined chlorine.

The Free Chlorine Pocket Checker measures free Chlorine only. The Total Chlorine Pocket Checker measures both free and combined forms of chlorine. These great value pocket checkers provide invaluable data regarding water quality and safety.

* Accuracy +/- 0.03 mg/L (ppm)
* 0.01 mg/L (ppm) resolution
* Designed to work with Hanna DPD reagents
* Large easy to read digits
* Auto shut-off
* Comes complete with two sample cuvettes, one black cuvette cap, starter pack of six reagents, one 1.5V AAA battery and full working instructions



Range: 0.00 - 2.50 ppm (mg/L)
Resolution: 0.01 ppm (mg/L)
Precision: 3% of reading +/- 0.03 ppm (mg/L) at 25 degrees Celcius
Light Source: LED at 525 nm
Light Detector: Silicon photocell
Environment: 0 - 50 degrees Celcius (32 - 122 degrees Fahrenheit); RH max 95% non-condensing
Battery Type: (1) 1.5V AAA
Auto-off: After 2 minutes of non-use and after read
Dimensions: 81 x 61 x 37.5 mm
Weight: 64 g (2.25 oz)
Method: EPA approved DPD method Standard Method 4500-Cl G.

HarmfulHealth HazardAge Restricted

Customer Reviews

Manufacturer: Hanna Instruments
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