Model | ✅ HI721 |
---|
Hanna HI721 iron checker is easier to use and shows more accurate results than chemical test kits. This checker is ideal for water quality checks in education institutes, industrial, municipal water, and aquarium. It features an adaptation of the standard method and the 3500-Fe B. phenanthroline method. This iron checker gets automatically shut-off after three minutes of non-use and two minutes after reading.