Photometer pH, Free Chlorine and Total Chlorine, Alkalinity, Cyanuric Acid Hanna

The internal reference system of the HI-97104 photometer 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.
High Efficiency Light Source:

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.
High Quality Filters:

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.
Greater Light Yield:

A focusing lens collects all of the light that exits the cuvette, eliminating errors from imperfections and scratches that may be present in the glass. The use of the convex lens reduces the need for indexing cuvettes.
CAL Check Functionality:

Hanna’s exclusive CAL Check feature allows for performance verification and calibration of the meter using NIST traceable standards. Our CAL Check standard vials are developed to simulate a specific absorbance value at each wavelength to verify the accuracy of subsequent readings.
Alkalinity Range        0 to 500 mg/L (as CaCO3)
Environment        0 to 50°C (32 to 122°F); relative humidity: 100% (IP67, floating case)
Cyanuric Acid Range        0 to 80 mg/L (as CYA)
Chlorine Range (all ranges)        0.00 to 5.00 mg/L (as Cl2)
Chlorine Resolution        0.01 mg/L
pH Resolution        0.1 pH
Alkalinity Resolution        1 mg/L
Cyanuric Acid Resolution        1 mg/L
Battery Type/Life        1.5V AA battery (x3) / > 800 measurements (without backlight)
Display        128 x 64 pixel B/W LCD with backlight
Dimensions        142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")
Weight        380 g (13.4 oz.) with batteries
Logging Memory        50 measurement
Bandpass Filter Bandwidth        8 nm
pH Method        adaptation of Phenol Red method
Chlorine Method        adaptation of the EPA DPD 330.5 method
Cyanuric Acid Method        adaptation of the turbidimetric method
Automatic Shut-Off        After 15 minutes of inactivity (30 minutes before a READ measurement)
Logging Type        automatic logging
Alkalinity Method        Colorimetric method
GLP        date, time of last calibration
Ordering Information        HI-97104 is supplied with cuvettes (2), caps (2), plastic inserts for cuvettes (2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate. Kit: HI-97104C is supplied with CAL-Check standards, cuvettes (2), caps, (2), plastic inserts for cuvettes (2), scissors, cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and instrument quality certificate.
Measurement system Light Source        Light emitting diode
Cuvette Type        round, 24.6 mm diameter (22 mm inside)
Photometer/Colorimeter Light Detector        silicon photocell with narrow band interference filter @ 525 nm
Chlorine Accuracy        ±0.03 mg/L ±3% of reading
pH Accuracy        ±0.1 pH @ 25°C
Cyanuric Acid Accuracy        ±1 mg/L ±15% of reading @ 25°C
Bandpass Filter Wavelength Accuracy        ±1.0 nm
Alkalinity Accuracy        ±5 mg/L @ 25°C