These portable photometer for total and free chlorine 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
This product cannot be purchased online. Fill in the form to get a quotation, thank you.
The casing offers IP67 waterproof protection and floats.
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.
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. The CAL Check screen guides the user step-bystep through the validation process and user calibration.
Multiple measurement methods
Users can select the use of powder reagents supplied in packets or the use of low cost liquid reagents supplied in a dropper bottle. Built-in reaction timer Waiting the proper reaction time is of key importance when performing colorimetric measurements. The countdown timer displays the time remaining until a measurement will be taken, ensuring consistent results between sample measurements and users.
Good Laboratory Practice (GLP) shows the date and time of the last user calibration.
These meters use three common AA batteries that allow for about 800 measurements to be taken. The auto-off feature automatically shuts off the meter after 15 minutes of inactivity in order conserve battery life.
Built-in reaction timer
Waiting the proper reaction time is of key importance when performing colorimetric measurements. The countdown timer displays the time remaining until a measurement will be taken, ensuring consistent results between sample measurements and users.
Large cuvette size
The sample cell of these photometers fits a round, glass cuvette with a 25 mm path length. The relatively long path length of the sample cuvette allows the light to pass through more of the sample solution, ensuring accurate measurements even in low absorbance samples. The cuvette holder features ridges to protect scratching of the optical path by the cuvette.
Intuitive dot matrix display
These photometers are designed with a backlit, graphic LCD. With virtual keys, a battery status indicator, and error messages. Users will find the interface intuitive and easy to read.
Log and recall the last 50 measurements.
A dedicated help key provides information relating to the current meter operation, and can be used at any stage in the setup or measurement process to show contextual help.
On-screen tutorial mode with animations
The built in Tutorial mode guides users step-by-step through the measurement process.
Messages appear on the display alerting to problems such as out of range, light low, light high, ambient temperature out of limits, and battery low.
Battery status indicator
Indicates the amount of battery life left.
• LED that generates no heat
• 8 nm narrow band interference filter that is accurate to
±1 nm and offers 25% increase in light efficiency.
• Reference detector that modulates the voltage
to LED for consistent light output.
• A concave focusing lens that reduces errors
from imperfections in the cuvette
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.
0.00 to 5.00 mg/L (as Cl₂)
±0.03 mg/L ±3% of reading at 25 °C
Adaptation of the EPA DPD method 330.5
light emitting diode
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)
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.
HI97711 is supplied with sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), instrument quality certificate and instruction manual. CAL Check standards and testing reagents sold separately HI97711C includes photometer, CAL Check standards, 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