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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 £40 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 £22 per year
Wildlife Survey & Monitoring  Aquatic Survey & Monitoring  Water Testing  pH Meters

Alkalinity Pocket Checker

Manufacturer: Hanna Instruments
  • Quick and easy alkalinity testing
  • High precision results
  • Auto shut-off feature
Alkalinity Pocket Checker
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  • Alkalinity Pocket Checker Fresh Water (HI-775) In stock
  • Alkalinity Pocket Checker Seawater (HI-755) Usually dispatched within 4 days
Selected product: £73.33
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About this product

The Alkalinity Pocket Checker is available in either a Fresh Water (HI-775) or Saltwater (HI-755) model. They offer a quick, simple and highly accurate method of measuring alkalinity from a water sample. They are ideal for checking water quality and have numerous environmental applications as well as being suitable for testing water from aquaria. The Saltwater model is purposely designed for saltwater aquaria and is particularly useful for coral reef tanks. Please note that the Saltwater model is not suitable for cold water aquaria.

The Alkalinity Checker uses a colorimetric method which causes a distinctive range of colors from yellow to blue to develop. 

Supplied with:
* Two sample cuvettes 
* Cuvette cap 
* Starter pack of reagents
* 1 x 1.5V AAA battery
* Instruction manual

Please note: Any chlorine present in the sample will interfere with the reading. To remove the chlorine interference add one drop of HI-93755-53 Chlorine Remover to the unreacted sample prior to testing.



* Range: 0 to 300ppm (freshwater), 0 to 250ppm (seawater)
* Resolution: 1ppm (freshwater), 0.1ppm (seawater)
* Accuracy (@25°C/77°F) freshwater: ± 5ppm ± 5% of reading
* Accuracy seawater: ±10% of reading (0-75) and ±5% of reading (75-250)
* Measurement method: Colorimetric
* Light source: Photodiode @ 610nm
* Light detector: Silicon photocell
* Method: Colorimetric method. The reaction causes a distinctive range of colors from yellow to green to blue to develop. 
* Power supply: 1 x 1.5V AAA (included)
* Power auto off: After 10 min. of inactivity
* Environment (freshwater only): 0 to 50°C (32 to 122°F); RH max 95% non-condensing
* Dimensions: 81.5 x 61 x 37.5mm (3.2 x 2.4 x 1.5”)
* Weight: 64g (2.25oz.)


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