EPA Compliant Benchtop Turbidity and Chlorine Meter
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Principal 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 HI83414 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 HI83414 is designed to have very low stray light, providing highly accurate results for low turbidity samples.
The HI88703-11 AMCO AEPA-1 standards ensure that measurements are traceable to primary reference materials. These standards are used for calibration and performance verification of the HI83414 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 HI83414.
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 HI83414-01 NTU ratio Range 0.00 to 9.99; 10.0 to 99.9; 100 to 4000 NTU
0.0 to 99.9; 100 to 26800 Nephelos
0.00 to 9.99; 10.0 to 99.9; 100 to 980 EBCNTU ratio Resolution 0.01; 0.1; 1 NTU
0.1; 1 Nephelos
0.01; 0.1, 1 EBCNTU non ratio Range 0.00 to 9.99; 10.0 to 40.0 NTU 0.0 to 99.9; 100 to 268 Nephelos 0.00 to 9.80 EBC NTU non ratio Resolution 0.01; 0.1 NTU 0.1; 1 Nephelos 0.01 EBC NTU Accuracy ±2% of reading plus 0.02 NTU (0.15 Nephelos; 0.01 EBC)
±5% of reading above 1000 NTU (6700 Nephelos; 245 EBC)Range Selection Automatic Turbidity Repeatability ±1% of reading or 0.02 NTU (0.15 Nephelos; 0.01 EBC) whichever is greater Stray Light < 0.02 NTU (0.15 Nephelos; 0.01 EBC) 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 Nephelometric method (90°) or Ratio Nephelometric Method (90° & 180°)
Adaptation of the USEPA Method 108.1 and Standard Method 2130 B.Measuring mode Normal, Average, Continuous Turbidity Standards <0.1, 15, 100, 750 and 2000 NTU Calibration Two, three, four or five-point calibration Light Source Tungsten filament lamp Lamp Life greater than 100,000 readings Display 40 x 70mm graphic LCD (64x128 pixels) with backlight LOG Memory 200 records Serial Interface USB Environment 0°C (32°F) to 50°C (122°F); max 95% RH non-condensing Power Supply 230 V/50 Hz or 115 V/60 Hz 20 W Auto Shut-Off After 15 minutes of non-use Dimensions 230 x 200 x 145 mm (9 x 7.9 x 5.7”) L x W x H Weight 2.5 Kg (88 oz.) Warranty 2 years - Product Manuals
