A box of 10 sachets. 5 of pH 4.01 buffer solution and 5 of pH 7.01 buffer solution. Each sachet contains 20ml of solution and can be used for calibrating any pocket pH meter, or any pH meter with a conventional pH electrode.
* Care of your pH meter
There are currently no reviews for this product. Be the first to review this product!
Your orders support book donation projects
The packaging of both books was superb and they are in pristine condition. Thank you again for the service.
Search and browse over 110,000 wildlife and science products
Multi-currency. Secure worldwide shipping
Wildlife, science and conservation since 1985