| Hanna (HI96711) Chlorine Meter (Total/Free) 0-2.5 MG/L |
 The HI96711 Free and Total Chlorine Portable Photometer combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of free and total chlorine in a variety of water samples within a 0.00 to 5.00 mg/L (ppm) range using ready made reagents. The HI93701-01 reagents are used for free chlorine and the the HI93711-01 are used for total chlorine measurements. The HI96711 offers many advanced features including the exclusive CAL Check� function used for performance verification and calibration of the meter. The HI96711 uses an adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G to measure free and total chlorine concentrations of less than 5.00 mg/L (ppm). When the DPD reagent is added to samples containing free chlorine, the sample will turn a pink hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complimentary color, and the emitted radiation is dependent upon concentration. For free chlorine determination, a narrow band interference filter at 525 nm (green) allows only green light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases. Features at-a-glance CAL Check� - Allows for performance verification and calibration of the meter using NIST traceable standards. GLP - Review of the last calibration date Auto-shut off - Automatic shut off after 10 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally not turned off. 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 to low. Cooling lamp indicator - To maintain the desirable wavelength to be used for absorbance it is necessary to ensure component are not overheated from the heat generated by the tungsten lamp. Each photometer is designed to allow a minimal amount of time for components to cool. The cooling lamp indicator is displayed prior to a reading being taken. Units of measure - Appropriate unit of measure is displayed along with reading. Price: 356.34 |