Turbidity and Chlorine Portable Meter
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Principle of Operation
The light beam that passes through the sample is scattered in all directions. The intensity and pattern of the scattered light is affected by many variables, such as wavelength of the incident light, particle size and shape, refractive index, and color. The optical system of the HI93414 includes a tungsten filament lamp, a scattered light detector (90°) and a transmitted light detector (180°).
In the ratio turbidimeter range, the microprocessor of the instrument calculates the NTU value from the signals that reach the two detectors by using an effective algorithm that corrects and compensates for interferences of color. The optical system and measuring technique also compensate for fluctuations in lamp intensity, minimizing the need for frequent calibration.
In the non-ratio turbidimeter range, the NTU value is calculated from the signal on the scattered light detector (90°). This method offers a high linearity on the low range but is more sensitive to lamp intensity fluctuations. The lower detection limit of a turbidimeter is determined by stray light that is detected by the sensors but not caused by light scattering from suspended particles. The optical system of the HI93414 is designed to have very low stray light, providing highly accurate results for low turbidity samples.
The HI98703-11 AMCO AEPA-1 standards ensure that measurements are traceable to a primary reference materials. These standards are used for calibration and performance verification of the HI93414 turbidity meter.
Supplied with Certificate of Analysis:
- Lot number
- Expiration date
- Standard value @ 25 °C
- Reference meter NIST traceable
Provided storage containers:
- Light tight
- Protects from accidental breakage
CAL Check™ standards with certificate
The HI93414-11 free and total chlorine CAL Check™standards are used for calibration and performance verification of the HI93414.
Supplied with Certificate of Analysis:
- Lot number
- Expiration date
- Standard value @ 25 °C
- Reference meter NIST traceable
Provided storage containers:
- Light tight
- Protects from accidental breakage
Resources
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Specifications
Specification Name Detail sku HI93414-01 NTU Range 0.00 to 9.99; 10.0 to 99.9 and 100 to 1000 NTU NTU Resolution 0.01 NTU from 0.00 to 9.99 NTU;
0.1 NTU from 10.0 to 99.9 NTU;
1 NTU from 100 to 1000 NTUNTU Accuracy ±2% of reading plus 0.02 NTU Range Selection Automatic Turbidity Repeatability ±1% of reading or 0.02 NTU, whichever is greater Stray Light < 0.02 NTU Free Clorine Range 0.00 to 5.00 mg/L Total Chlorine Range 0.00 to 5.00 mg/L Chlorine Resolution 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 above 3.50 mg/L Chlorine Accuracy ±0.02 mg/L @ 1.00 mg/L Chlorine Detector Silicon photocell with 525 nm narrow band interference filters Chlorine Method Adaptation of the USEPA Method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and DPD reagent causes a pink tint in the sample. Chlorine Standards 1 mg/L free chlorine, 1 mg/L total chlorine Chlorine Calibration One-point calibration Turbidity Light Detector Silicon Photocell Turbidity Method Ratio Nephelometric Method (90°), ratio of scatter and transmitted ligh
Adaptation of the USEPA Method 180.1 and Standard Method 2130 B.Measuring mode Normal, Average, Continuous. Turbidity Standards <0.1, 15, 100 and 750 NTU Calibration Two, three or four-point calibration Light Source Tungsten filament lamp Lamp Life greater than 100,000 readings Display 60 x 90mm LCD with backlight LOG Memory 200 records Serial Interface RS232 or USB 1.1 Environment 0°C (32°F) to 50°C (122°F); max 95% RH non-condensing Power Supply 4 x 1.5V AA alkaline batteries or AC adapter Auto Shut-Off After 15 minutes of non-use Dimensions 224 x 87 x 77 mm (8.8 x 3.4 x 3.0'’) Weight 512g (18 oz.) Warranty 2 years - Product Manuals
Keep extra testing supplies on-hand
