Hanna Phosphate Checker Review: notable compromises still worth the resolution and portability

The Hanna phosphate checker is a green, egg-shaped hand-held colorimeter for portable testing of phosphate concentration with digital precision. If you’re like us, you’ve probably been wondering how Hanna could make such a small and affordable little colorimeter that could…

Hanna Instruments new PO4 checker phosphate colorimeter

Hanna Instruments has released a new phosphate checker colorimeter that should make it easier for you to check your water parameters or at least phosphate. The new phosphate colorimeter has a resolution of 0.01 ppm (250 points) and 4% ±0.04…