Hanna HI93703LEG portable turbidimeter (0.00 to 1000 FTU) with carrying case and 0 and 10 NTU...

Videos: Hanna HI93703LEG portable turbidimeter (0.00 to 1000 FTU) with carrying case and 0 and 10 NTU calibration standards Description: Hanna HI93703LEG portable turbidimeter (0.00 to 1000 FTU) with carrying case and 0 and 10 NTU calibration standardsDevice DescriptionThe HI93703 portable turbidity meter is specially designed for water quality measurements, providing reliable and accurate readings, even within low turbidity ranges.The instrument is based on a state-of-the-art optical system that guarantees accurate results, ensures long-term stability, and minimizes stray light and color interference.Periodic calibration with the supplied standards compensates for any variations in the intensity of the tungsten lamp.The 25 mm cuvettes made of special optical glass guarantee the repeatability of turbidity measurements.Up to three-point calibrationCuvette safety systemWater-resistant keypadThis turbidimeter complies with Royal Decree 487/2022 of LegionellosisRD 487/2022 LegionellosisTurbidity DescriptionTurbidity is one of the most important parameters for determining the quality of drinking water.It was considered an essentially aesthetic characteristic of drinking water; however, there is now significant evidence that controlling turbidity is an effective protection against pathogens.In natural waters, turbidity measurements are taken to determine the overall water quality and its compatibility with applications involving aquatic organisms.Wastewater control and treatment were based solely on turbidity control.Currently, turbidity measurement is required at the end of the process of wastewater treatment to verify that the values are within regulations.Water turbidity is an optical property that causes light to scatter and absorb, rather than be transmitted.The scattering of light passing through a liquid is primarily caused by the presence of suspended solids.The greater the turbidity, the greater the amount of scattered light. Even a very pure liquid will scatter light to some extent, as no solution has zero turbidity.The ISO standard for turbidity measurement uses infrared wavelengths of light, which are outside the visible spectrum.The main benefit of the ISO method over the EPA method is the reduction of color interference.The EPA method uses a tungsten lamp that produces light containing all visible wavelengths, which we perceive as white.A colored solution will be adsorbed by a complementary wavelength, which will affect the turbidity reading.Since the ISO method is outside the visible wavelength range, the color of the sample does not interfere with the measurement.The USEPA uses the tungsten lamp because it provides better accuracy at low ranges, and drinking water must be colorless.ISO 7027:1999 RequirementsThe requirements for an optical turbidimeter to perform the measurement of diffuse radiation used in low-range measurements (i.e., drinking water), expressed in formazin nephelometric units according to ISO 7027:1999, are:Measurement of diffuse radiation for water with low turbidity (0 FNU to 40 FNU)The wavelength of the incident radiation shall be 860 nmThe spectral bandwidth of the incident radiation shall be less than or equal to 60 nmThere shall be no divergence from the parallelism of the incident radiation, and any convergence shall not exceed 1.5°The measurement angle, between the optical axis of the incident radiation and that of the diffuse radiation will be 90° or /- 2.5°The aperture angle should be between 20° and 30° in the water sampleThe HI93703 instrument meets and exceeds the measurement criteria specified by ISO 7027.Operating PrincipleThe light beam passing through the sample is scattered in all directions.The intensity and pattern of the scattered light are affected by many variables, such as the wavelength of the incident light, the size and shape of the particles, the refractive index, and the color.The optical system of the HI93703 includes an LED and a scattered light detector (90°).The lower detection limit of a turbidimeter is determined by the scattered light that is detected by the sensors, but not by the light caused by the Light scattering from suspended particles.The HI93703's optical system is designed to have very little stray light, providing highly accurate results for low-turbidity samples.General FeaturesSimple Beam Design: The HI93703 measures turbidity using a 90° light detector for scatter light detection. Turbidity measurements can be performed in the range of 0.00 to 1000 FTU.ISO Compliance: The HI93703 meets and exceeds the requirements of ISO 7027 for turbidity measurements using an infrared LED light source. Because this meter has been designed to follow this ISO method, the units are shown in FTU (formacin turbidity unit).FTU is equivalent to the other internationally recognized unit, NTU (Nephelometric Turbidity Unit).Calibration: The HI93703 has a powerful calibration function that compensates for variations in light intensity. Calibration can be performed using the supplied calibration solutions or with user-prepared standards. Two- or three-point turbidity calibration can be performed using the supplied standards (0, 10, and 500 FTU).AMCO AEPA-1 Primary Turbidity Standard: Standards supplied by AMCO AEPA-1 are recognized as a primary standard by the USEPA. These standards are non-toxic and made of styrene divinylbenzene polymer spheres, which are uniform in size and density. The standards are reusable and stable, with a long shelf life.Last Calibration Date: Allows the user to store the last calibration date. Retrieving the last calibration date is simple; just press the "DATE" button located on the front of the meter.Low Battery Indicator: The message "LO BAT" will appear in the lower right corner of the display when the batteries are low and need to be replaced. At this point, the instrument can still perform approximately 50 measurements. When the battery is too low to perform reliable measurements, a message will appear, and the meter will automatically shut down.Technical DataRange: 0.00 to 1000 FTUResolution: 0.01 (0.00 to 50.00 FTU); 1 (50 to 1000 FTU)Accuracy: ± 0.5 FTU or ± 5% of reading (whichever is greater)Calibration: Three points (0 FTU, 10 FTU, and 500 FTU)Light Detector: Silicon PhotocellLight Source: Infrared LEDBattery Type/Life: 1.5V AA (4): Approximately 60 hours of continuous use or 900 measurements; automatic shut-off after 5 minutes of inactivityAmbient Conditions: 0 to 50°C; max. RH 95% (non-condensing) Dimensions: 220 x 82 x 66 mmWeight: 510 gContents1 HI93703 Turbidimeter4 AA 1.5V Batteries2 Glass CuvettesThe HS93703LEG is supplied in a carrying case with 0 and 10 NTU (30 ml) calibration standards*, 2 cuvettes, a cleaning cloth, batteries, and an instruction manual.