Hanna HI720 Calcium Hardness Checker

Hanna HI720 Calcium Hardness Checker

The Hanna HI720 Calcium Hardness Checker is a handheld digital colorimeter specifically designed to measure calcium hardness levels in water with precision and ease. Compared to conventional chemical test kits, this compact device offers professional-grade accuracy and repeatability, making it an ideal solution for water treatment, aquariums, and general water quality monitoring.

Using an adaptation of the Standard Methods for the Examination of Water and Wastewater (18th edition, Calmagite method), the HI720 produces a reddish-violet tint in the sample when calcium reacts with the reagent. This coloration is then measured photometrically to provide direct, reliable readings.

Product Features

• Dedicated to Calcium Hardness
  Measures calcium exclusively, eliminating cross-interference with magnesium or other hardness ions.

• Precise Digital Output
  Offers a clear and accurate digital display, replacing subjective visual interpretation.

• Compact and Portable Design
  Pocket-sized and lightweight, perfect for both field and lab use.

• One-Button Operation
  Ensures quick and effortless measurement without technical complexity.

• Power Efficient
  Operates on a single AAA battery and includes auto shut-off to conserve energy.

• Stable Optical System
  Equipped with an LED at 525 nm and a silicon photocell for consistent performance.

Applications

• Drinking Water and Water Treatment
  Ensures calcium levels remain within safe and regulated limits to protect piping systems and appliances.

• Swimming Pools and Spas
  Helps maintain balanced water chemistry for user safety and comfort.

• Food & Beverage Industry
  Verifies water quality in production processes and quality assurance testing.

• Aquariums and Freshwater Aquaculture
  Monitors calcium levels to support healthy aquatic life.

• Education and Research
  A valuable tool for classroom demonstrations, laboratory analysis, and field studies.

Technical Specifications

• Model: HI720

• Measurement Range: 0.00 to 2.70 ppm (mg/L)

• Resolution: 0.01 ppm

• Accuracy @ 25°C: ±0.20 ppm ±5% of reading

• Light Source: LED @ 525 nm

• Light Detector: Silicon photocell

• Measurement Method: Calmagite method (adaptation of Standard Methods for Water and Wastewater, 18th Edition)

• Operating Environment: 0 to 50°C (32 to 122°F); Max 95% RH (non-condensing)

• Battery Type: (1) 1.5V AAA

• Auto Shut-off: After 10 minutes of inactivity

• Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5 inches)

• Weight: 64 g (2.25 oz)