Product Overview

• HI93703-11

• Portable Turbidity Meter (ISO Standard)

• Portable turbidity meter, compliant with ISO 7027 measurement standard, with automatic range switching between low turbidity range (0.0 to 50.00 FTU) and high turbidity range (50 to 1000 FTU). Built-in high-quality optical system, combined with a large cuvette and light-blocking measurement chamber, allows light to pass through at a higher position and reduces the effects of light source fluctuations and stray light.

• AMCO - AEPA-1 dedicated turbidity calibration kit, non-toxic and harmless, stable performance, suitable for long-term storage and repeated use. Used for periodic calibration of the internal curve to ensure accurate instrument measurement. Widely applicable to water quality monitoring, wastewater treatment, and laboratory measurement.

• Automatic range switching, built-in turbidity standard calibration points, ensuring measurement accuracy

• Unique GLP management function, automatically stores the last calibration date

• Compliant with ISO 7027 turbidity standard, FTU is Formazin Turbidity Unit

• 199 data sets storage, RS232 data interface, convenient for data transmission, management and analysis (HI93703-11 only)

• Battery level display, timely reminder to replace batteries, auto power-off power-saving mode

• Technical Measurements:

HI93703 is a high-precision benchtop turbidity meter for high-precision measurement of turbidity in water and wastewater in the field and laboratory. The instrument is supplied as a kit with AMCO-AEPA-1 primary turbidity standards for calibration and performance verification. HI93703 meets and exceeds the requirements of ISO 7027 turbidity measurement method.

• Up to three-point calibration

• Positive locking cuvette system

• Waterproof keypad

• The HI93703 portable turbidity meter is designed for water quality measurement, providing reliable and accurate readings even in the low turbidity range. The instrument is based on a state-of-the-art optical system that ensures accurate results, long-term stability, and minimizes stray light and color interference. Regular calibration with the supplied standards compensates for any variation in LED light source intensity. The 25mm round cuvette made of special optical glass guarantees repeatability of turbidity measurements.

• Features at a glance

• Single-beam design - HI93703 uses a 90° light detector to measure turbidity by detecting scattered light. Turbidity measurement can be performed in the range of 0.00 to 1000 FTU.

• ISO compliant - HI93703 meets and exceeds the requirements of the ISO 7027 method for turbidity measurement using an infrared LED light source. Since the meter is designed according to the ISO method, units are displayed in FTU (Formazin Turbidity Units); FTU is equivalent to NTU, another internationally recognized unit (Nephelometric Turbidity Units).

• Calibration – HI93703 features a powerful calibration function that compensates for changes in light intensity. Calibration can be performed using the supplied calibration solutions or user-prepared standards. Two-point or three-point turbidity calibration can be performed using the supplied (0, 10 and 500 FTU) standards.

• AMCO AEPA-1 primary turbidity standards - The standards supplied by AMCO AEPA-1 are recognized by the US EPA as primary standards. These non-toxic standards are made of styrene-divinylbenzene polymer spheres of uniform size and density. These standards are reusable and stable with a long shelf life.

• Last calibration date – HI93703 allows the user to store the last calibration date. Simply press the “date” button on the instrument surface to recall the last calibration date.

• Low battery indicator - When the battery is low and needs replacement, a “low battery” indication will appear in the lower right corner of the display. At this point, the instrument can still perform approximately 50 measurements. When the battery is too low for reliable measurement, a message will appear and the meter will automatically shut off.

• The HI93703 portable turbidity meter is designed for water quality measurement, providing reliable and accurate readings even in the low turbidity range. The instrument is based on a state-of-the-art optical system that ensures accurate results, long-term stability, and minimizes stray light and color interference. Regular calibration with the supplied standards compensates for any variation in LED light source intensity. The 25mm round cuvette made of special optical glass guarantees repeatability of turbidity measurements.

• Significance of use

• Turbidity is one of the most important parameters determining the quality of drinking water. Once considered primarily an aesthetic characteristic of drinking water, there is now significant evidence that turbidity control is an effective safeguard against pathogens. In natural waters, turbidity measurement is performed to measure general water quality and its compatibility in applications involving aquatic life. Wastewater monitoring and treatment was once entirely based on turbidity control. Currently, it is necessary to measure turbidity at the end of the wastewater treatment process to verify that its value is within regulatory standards.

• Turbidity of water is an optical property that causes light to be scattered and absorbed rather than transmitted. The scattering of light passing through a liquid is mainly caused by the presence of suspended solids. The higher the turbidity, the greater the amount of scattered light. Even very pure liquids scatter light to some extent, as no solution has zero turbidity.

• The ISO turbidity measurement standard uses light at infrared wavelengths outside the visible spectrum. The main advantage of the ISO method compared to the EPA method is reduced color interference. The EPA method uses a tungsten lamp that produces light containing all visible wavelengths of white light as we see it. Colored solutions will absorb light at complementary wavelengths, which will affect turbidity readings. Since the ISO method is outside the visible wavelengths, color in the sample will not interfere with the measurement. The US EPA prefers tungsten lamps because they provide better accuracy in the low range, and drinking water should not be colored. According to ISO 7027:1999, the requirements for optical turbidity meters used for measuring scattered radiation in low-range measurements (i.e., drinking water) expressed in Formazin Nephelometric Units (FNU) are:

• Measurement of scattered radiation in low turbidity water (0 FNU to 40 FNU)

• The wavelength of the incident radiation shall be 860 nm.

• The spectral bandwidth of the incident radiation shall be less than or equal to 60 nm.

• The parallelism of the incident radiation shall have no divergence, and any convergence shall not exceed 1.5°.

• The measurement angle θ between the optical axis of the incident radiation and the optical axis of the scattered radiation shall be 90°±2.5°.

• In the water sample, the aperture angle shall be between 20° and 30°.

• The HI93703 portable turbidity meter is designed for water quality measurement, providing reliable and accurate readings even in the low turbidity range. The instrument is based on a state-of-the-art optical system that ensures accurate results, long-term stability, and minimizes stray light and color interference. Regular calibration with the supplied standards compensates for any variation in LED light source intensity. The 25mm round cuvette made of special optical glass guarantees repeatability of turbidity measurements.

• Significance of use

• Turbidity is one of the most important parameters determining the quality of drinking water. Once considered primarily an aesthetic characteristic of drinking water, there is now significant evidence that turbidity control is an effective safeguard against pathogens. In natural waters, turbidity measurement is performed to measure general water quality and its compatibility in applications involving aquatic life. Wastewater monitoring and treatment was once entirely based on turbidity control. Currently, it is necessary to measure turbidity at the end of the wastewater treatment process to verify that its value is within regulatory standards.

• Turbidity of water is an optical property that causes light to be scattered and absorbed rather than transmitted. The scattering of light passing through a liquid is mainly caused by the presence of suspended solids. The higher the turbidity, the greater the amount of scattered light. Even very pure liquids scatter light to some extent, as no solution has zero turbidity.

• HI93703 meets and exceeds the instrument standards specified in ISO 7027.

• Principle of operation

• A beam of light passing through a sample is scattered in all directions. The intensity and pattern of scattered light are affected by many variables, such as the wavelength of incident light, particle size and shape, refractive index, and color. The optical system of HI93703 includes an LED and a scattered light detector (90°).

• The lower detection limit of a turbidity meter is determined by the stray light detected by the sensor that is not caused by light scattering from suspended particles. The optical system of HI93703 is designed to have very low stray light, providing highly accurate results for low turbidity samples.

Principle of operation:

• HI93703C is supplied as a kit. The kit includes:

• Portable turbidity meter

• Sample cuvettes (2)

• Caps (2)

• Batteries (4 x 1.5V AA) and instructions

• HI93703-0 (0 FTU) and HI93703-10 (10 FTU) calibration solutions

• HI93703-50 cleaning solution

• Tissues for wiping cuvettes

• Rugged carrying case

• The AMCO AEPA-1 standards for HI93703 ensure measurement traceability to primary reference materials. These standards are used for calibration and performance verification of turbidity meters.

• Certificate of Analysis provided

• Lot number

• Expiration date

• Standard value at 25°C

• NIST traceable reference meter

• Storage container provided

• Light tight

• Protects against accidental breakage

• Notes

• The above is the machine translation result

• Key vocabulary

• turbidity meter浊度仪浊度计

• cleaning solution清洁溶液洗液，洗涤液

• carrying case手提箱集装箱；装运箱；携带式仪器箱；弹药箱

• used for用于

• performance verification性能验证校验

• Certificate of Analysis分析证书分析证明书分析报告检验分析报告

• Lot number批号产品批号地段编号批数

• Expiration date过期时间信用卡有效期限护照到期日到期日

• Standard value标准值

• Light tight不透光的防光的；不漏光