Hanna Instruments HI-715 Ammonia Medium Range Checker®HC (0.00 to 9.99 ppm)

The Hanna Instruments HI-715 is an accurate and reliable digital colorimeter for measuring ammonia in freshwater across a medium range of 0.00 to 9.99 ppm. Designed as a more accurate alternative to test strips, the HI-715 provides a clear digital readout with no colour-matching guesswork, allowing swift, informed adjustments to maintain correct water chemistry. Single-button operation and a 10ml sample requirement make it simple and fast to use, and a built-in timer ensures timed reaction readings are handled automatically.

The HI-715 uses an adaptation of the ASTM Manual of Water and Environmental Technology D1426-93, Nessler Method. Reagents react with ammonia to produce a yellow tint in the sample, which the Checker reads and displays as a digital ppm value. Ammonia is produced naturally in aquariums through fish excretion, urine, faeces and the decomposition of organic matter — elevated levels can cause burns to fish skin and scales, reduce their ability to absorb oxygen and trigger algae growth that affects pH. The HI-715 is supplied with a starter kit of 25 reagent tests so testing can begin straight out of the box.

Key Features

• Ammonia measurement range 0.00 to 9.99 ppm in fresh water
• Accuracy ±0.05 ppm ±5% of reading
• More accurate than test strips — clear digital readout, no colour matching required
• Dedicated single parameter instrument for ease of use
• Single-button operation with 10ml water sample
• Small palm-sized design — ideal for aquarium, field and laboratory use
• Built-in timer for timed reaction readings
• Auto power off after 10 minutes of inactivity
• Single AAA battery powered (included)
• Supplied with 25-test reagent starter kit

Typical Applications

• Freshwater aquariums
• Water quality monitoring
• Environmental applications
• Education