Hanna Calcium Hardness Checker® HC

Hanna HI720 Calcium Hardness Checker is a handheld colorimeter designed for fast and precise measurement of calcium hardness in water samples. With a range of 0.00 to 2.70 ppm and an accuracy of ±5% of reading ± 0.20 ppm, this instrument bridges the gap between simple test kits and professional laboratory equipment by combining ease of use, compact size, and laboratory-grade accuracy.

Suitable for applications in water treatment, environmental monitoring, plating processes, and educational environments, the HI720 Checker HC ensures repeatable and consistent results. It uses the calmagite method, where the reaction of calcium with reagents produces a reddish-violet tint, allowing photometric determination of hardness. The user-friendly device operates in four simple steps and features automatic shut-off to conserve battery power. Its dedicated design for single-parameter testing, small footprint, and affordable price point make it a preferred choice for both routine and on-site testing.

• Provides high accuracy and reliability for calcium hardness measurement between 0.00–2.70 ppm.
• Delivers better resolution and accuracy compared to traditional chemical test kits.
• Features a user-friendly interface with four-step operation for convenient testing.
• Compact, portable design suitable for laboratory, industrial, education, and water quality monitoring applications.
• Automatic shut-off after ten minutes of non-use ensures battery efficiency.
• Utilizes LED @ 525 nm as the light source and a silicon photocell as the detector.
• Operates with a single 1.5V AAA battery for extended use.
• Calcium hardness determination is based on the calmagite method according to the Standard Methods for Examination of Water and Wastewater, 18th edition.

Common uses include aquatic labs, environmental quality monitoring, and process water control in plating or industrial settings. Explore more laboratory and water analysis equipment in the EnvMart Laboratory Instruments category.