The Hanna Instruments HI 707 is a hand-held colorimeter for testing low ranges of nitrites. It is designed as an accurate alternative to chemical test kits.
The HI758 Checker®HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure calcium.Calcium, colorimeter, handheld colorimeter
The Hanna Instruments HI 775 is a hand-held colorimeter for testing alkalinity in fresh water. It is designed as an accurate alternative to chemical test kits.
The Hanna Instruments HI 708 is a hand-held colorimeter for testing high ranges of nitrites. It is designed as an accurate alternative to chemical test kits.