Hanna Portable photometer for free and total chlorine

Advanced portable photometer for the measurement of free and total chlorine in the water. This meter offers a superior optical system that utilizes a reference detector and narrowband interference filters for extremely fast and repeatable measurements

Chlorine is a widely used chemical by many because of its properties for disinfection, oxidation, and bleaching. Chlorine is utilized in swimming pools, drinking water, and food processing to disinfect and prevent bacterial growth. In metal finishing, it functions as an oxidizer to transform cyanide in wastewater into cyanate, whereas in the pulp and paper sector, it is employed to bleach wood pulp to achieve white paper. The HI97711 is intended to detect low concentrations of free and total chlorine in water up to 5.00 mg/L (ppm). The HI97711 features a cutting-edge optical system that provides exceptional performance in precision, consistency, and the quickness of measurements. This small, waterproof meter is very easy to use with a tutorial mode that guides the user visually, step by step, through the measurement process. Employing a backlit dot matrix LED enables virtual keys, rendering the meter's operation highly intuitive HI97711 is completely waterproof including the cuvette holder that is designed with ridges to protect the optical path from getting scratched by the cuvette and a gasketed battery compartment that holds three common AA batteries. The compact design fits comfortably 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.

• LED that generates very little heat
• 8 nm narrowband interference filter that is accurate to +/- 1 nm and offers a 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

Stable Light Source: The internal reference system of the HI97711 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 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. 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 for the proper reaction time is of key importance when performing colorimetric measurements. The countdown timer displays the time remaining until a measurement is taken, ensuring consistent results between sample measurements and users. Large Cuvette Size: The sample cell of the HI97711 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. Intuitive Dot Matrix Display: The HI97711 is designed with a backlit, graphic LCD. With virtual keys, a battery status indicator, and error messages. Users will find the meter interface intuitive and easy to read. 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. Auto-off Protection: The meter uses 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 to conserve battery life.

QUICK TIP: Measurement procedure -  free chlorine: Note: Free and Total Chlorine have to be measured separately with fresh unreacted samples, following the related procedures, if both values are desired Required reagents: Code - HI93701-0 | Description: Free Chlorine Reagent |  Quantity: 1 packet 1. Select the Free Chlorine (Powder) method using the procedure described in the METHOD SELECTION section 2. Fill the cuvette with 10 mL of unreacted sample (up to the mark). Replace the plastic stopper and the cap. 3. Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove. 4. Press Zero. The display will show “-0.0-” when the meter is zeroed and ready for measurement. 5. Remove the cuvette. 6. Add the content of one packet of HI93701-0 Free Chlorine Reagent. Replace the plastic stopper and the cap. Shake gently for 20 seconds. 7. Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove 8. Press Read. The display will show a 1-minute countdown prior to the measurement. To skip the timer, press Read twice. When the timer ends, the meter will perform the reading. The instrument displays the results in mg/L of chlorine (Cl2)