The HANNA HI746 and HI721 iron pocket meters are digital colorimeters used for testing iron levels.

• Accurate and simple measurements
• Direct on-screen display of iron values
• Depending on the range:
    - Low range: 0 to 999 ppb (HI746)
    - High range: 0.00 to 5.00 ppm (HI721)

Designed as a more accurate alternative to chemical test kits, they provide quick and precise results in just a few simple steps:

Step 1: Add a sample to the cuvette (included).
Step 2: Insert the sample into the Checker and press the button to zero the meter.
Step 3: Remove the sample and add the reagent as indicated in the manual.
Step 4: Reinsert the sample and press the button for 3 seconds to take the measurement.

Ideal for: water quality, environmental testing, education, pools, spas, hospitality, food and beverage, and industrial processes.

HANNA Checkers are small, portable, and—above all—provide more accurate results than typical chemical test kits. With advanced technology and a simple design, they make testing easy and hassle-free.

These digital photometers, or test kits, serve as a bridge between basic visual kits and professional instruments like calibratable photometers.

Conventional test kits lack precision and rely entirely on the user’s ability to interpret color. That’s why HANNA has digitized the process, resulting in an accurate, pocket-sized digital colorimeter.

The innovative shape of the Checker fits comfortably in the palm of your hand or your pocket. The LCD screen is easy to read, and the automatic shut-off function preserves battery life in case you forget to turn it off.

Easier to use and more precise than visual test kits:

• Fast, accurate analysis

• Large, easy-to-read digits

• Automatic shut-off

• Dedicated to a single parameter

• Compact and convenient

• One-button operation: zero and measure