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The HI-97706C kit is supplied with a meter, CAL Check standards, cuvettes (2), caps (2), plastic inserts for cuvette, (2), scissors, a cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and an instrument quality certificate.

Phosphorus Range 0.0 to 15.0 mg/L

£719.30 (exc.VAT)
£863.16 (tax incl.)
Full Description Specification Manuals

About the photometer

The HI-97706 has an innovative optical system that offers superior performance in accuracy, repeatability, and the short amount of time it takes to perform a measurement. This compact, waterproof meter is extremely user friendly with a tutorial mode that walks the user graphically, step by step, in performing a measurement. The use of a backlit dot matrix LED allows the use of virtual keys which makes the operation of the meter very intuitive including selecting different methods, reviewing GLP data, recalling the last 50 measurements, and customising the meter to user preferences.

HI-97706 is waterproof including the cuvette holder that is designed with ridges to protect the optical path from getting scratched by the cuvette and a protected battery compartment that holds three AA batteries. The compact design fits comfortable in the hand for use in the field or on a table for benchtop use. The LCD is 71 mm (2.75") by 37 mm (1.6") and is backlit for easy viewing under all conditions.

Advanced LED optical system

LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat which could otherwise affect electronic stability.


Validate the performance of the instrument at any time and apply a user calibration using CAL Check cuvettes made with NIST traceable standards.

The CAL Check screen guides the user step-by-step through the validation process and user calibration.

Auto logging


Review of the last calibration date.

On-screen tutorial mode with animations

The built in tutorial mode guides users step-by-step through the measurement process.

Waterproof and floating IP67 case

Auto-shut off

Automatic shut off after 15 minutes of inactivity and 30 minutes before a read measurement.

Battery status indicator

Indicates the amount of battery life left.

Built-in timer

Display of time remaining before a measurement is taken. Ensures that all readings are taken at the appropriate reaction intervals for the test being performed.

Error messages

Messages on display alerting to problems including no cap, high zero, and standard too low.

Units of measurement

Appropriate unit of measure is displayed along with reading.</

About Phosphorus

Common in natural systems, such as lakes, oceans, and soil, phosphorus is an essential element for plant and animal growth. However, when present in large concentrations, phosphorus can cause excessive micro-organism and algae growth.

For hobbyists with saltwater aquaria, a high amount of phosphorus can be problematic to fish and coral.

The main source of phosphorus in reef aquaria is through food that is introduced on a daily basis, but it is also produced through the breakdown of plant material and excretion from fish. Replacement water can also be a source of phosphorus in aquaria, where tap water or reverse osmosis water is used to replace evaporated water and control the salt concentration in tanks.

Both forms of water contain phosphorus, albeit in varying concentrations, and will have negative effects if the accumulating levels are not controlled. Phosphorus is also responsible for corrosion of piping systems if present in high enough amounts.

Read More

Range0.0 to 15.0 mg/L (ppm) (as P)
Resolution0.1 mg/L
Accuracy±0.3 mg/L ±4% of reading
MethodAmino Acid Method, adapted from Standard Method for the Examination of Water and Wastewater
Photometer/Colorimeter Light SourceLight emitting diode
Photometer/Colorimeter Light DetectorSilicon photocell with narrow band interference filter @ 525 nm
Bandpass Filter Bandwidth8 nm
Bandpass Filter Wavelength Accuracy±1.0 nm
Cuvette Typeround, 24.6 mm diameter (22 mm inside)
GLPDate, time of last calibration
Display128 x 64 pixel B/W LCD with backlight
Logging Typeautomatic logging
Logging Memory50 measurement
Battery Type/Life1.5V AA battery (3 pcs.) / > 800 measurements (without backlight)
Automatic Shut-OffAfter 15 minutes of inactivity (30 minutes before a READ measurement)
Environment0 to 50°C (32 to 122°F); relative humidity: 100% (IP 67, floating case)
Weight380g with batteries
Dimensions142.5 x 102.5 x 50.5 mm