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The HI97105 Marine Master Photometer combines accuracy and ease of use in a simple, portable design. The advanced optical system provides lab-quality accuracy while its user-friendly design is easy for any aquarium user making it the perfect photometer for your water quality testing needs. The HI97105 is designed to accurately determine pH, Alkalinity, Calcium, Nitrate, Nitrite, and Phosphate level in aquariums and marine biology applications.

• No warm up time needed before taking a measurement.
• Tutorial mode for easy step-by-step instructions.
• CAL Check^TM for performance verification and calibration.