These portable photometers are designed with an innovative optical system that offers superior performance in accuracy, repeatability, and the amount of time that it takes to do a measurement.
These waterproof meters are 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 making operation of the meter very intuitive.
5 in stock
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LED light sources offer superior performance compared to tungsten lamps. 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. LEDs are available in a wide array of wavelengths, whereas tungsten lamps have poor blue/violet light output.
Improved optical filters ensure greater wavelength accuracy and allow a brighter, stronger signal to be received. The end result is higher measurement stability and less wavelength error.
The internal reference system of the these photometers compensates for any drifts due to power fluctuations or ambient temperature changes. With a stable source of light the readings are fast and stable between your blank (zero) measurement and sample measurement.
A focusing lens collects all of the light that exits the cuvette, reducing errors from imperfections and scratches that may be present in the glass. The use of the convex lens reduces the need for indexing cuvettes.
0.0 to 30.0 mg/L (as NO₃-N)
Accuracy @25°C (77°F)
±0.5 mg/L ±10% of reading at 25°C
Adaptation of Cadmium Reduction method
light emitting diode
Bandpass filter bandwidth
Bandpass filter wavelength accuracy
round 24.6 mm diameter (22 mm inside)
128 x 64 pixel B/W LCD with backlight
after 15 minutes of inactivity (30 minutes before a READ measurement)
Battery type / Life
alkaline 1.5 V AA (3) / > 800 measurements (without backlight)
0 to 50°C (32 to 122°F); 0 to 100% RH, non-serviceable
142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″)
380 g (13.4 oz.)
CAL Check standards and testing reagents sold separatelyHI97728C includes photometer, CAL Check cuvette A, CAL Check cuvette B for nitrate, sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), cuvette wiping cloth, scissors, instrument quality certificate, instruction manual and HI7101412 rigid carrying case.
Reagents sold separately
Reagents and Standards
HI97713-11 CAL Check standard cuvettes for nitrate
HI93728-01 nitrate reagent (100 tests)
HI93728-03 nitrate reagent (300 tests)
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