Marine Master Waterproof Wireless Multiparameter Photometer - Hanna Instruments

The HI97115 Marine Master consolidates nine reef-critical water parameters into a single photometer, removing the need to own and maintain separate test kits or meters for each analyte. Using a narrow-band LED optical system with interference filters and an internal reference channel, the meter compensates for power fluctuations and ambient temperature drift to deliver lab-grade colorimetric readings in a handheld form factor. Bluetooth connectivity links the meter to the Hanna Lab App on a compatible smart device, where results are logged automatically, notes can be added, and multi-tank measurement groups can be organized and shared.

Consistency is built into the hardware design. The positive-locking cuvette holder positions sample vials identically on every measurement, eliminating placement error that would otherwise introduce variability. A focusing lens captures all light exiting the cuvette, compensating for minor scratches or imperfections in the glass. The CAL Check validation system lets you confirm the photometer is performing within specification before running a test session, and a dedicated on-screen Tutorial Mode walks through each step with animations accessible at any point via the Help key.

The IP67-rated body is dust-tight, waterproof, and buoyant—if the meter is dropped into a sump or tank, it floats for easy retrieval. Internal optics are fully sealed from environmental contamination. A backlit LCD display remains readable in low-light conditions, and the included AA batteries are rated for more than 800 measurements. Auto data logging retains the last 50 results accessible via the Log Recall Menu, and an auto-off function after 15 minutes of inactivity conserves battery life.

The Marine Master ships as a ready-to-use kit. The included hard carrying case organizes the photometer alongside starter reagent sets for all supported parameters, two sample cuvettes with caps, graduated syringes, pipettes, a cleaning cloth, scissors, and an instrument quality certificate. Hobbyists with multiple systems will find the Hanna Lab App's per-tank tracking particularly practical. Those seeking continuous automated monitoring rather than manual spot-checks should compare the Neptune Trident or AquaWiz KH Controller Gen 5 before committing.