The Portable Turbidity Meter utilises an EPA compliant tungsten light source and state-of-the-art optical system that allows consistently reliable and accurate measurements for turbidity. Users will appreciate the accuracy and sensitivity of this instrument, particularly at very low turbidity levels.
To meet EPA reporting requirements these instruments have an EPA compliance reading mode. HI 98703 meets all EPA requirements with regards to the Standard Methods for Turbidity Measurements.
Turbidity is measured up to 1000 NTU. Depending on the measured sample and required accuracy, users can select normal measurement, continuous measurement or signal averaging. It can be equipped with Hanna’s (optional) Tag Identification System (TIS) which allows users to record the time and location of a specific measurement or series of measurements.
Logged data can be downloaded to a PC through either USB or RS232 connections. Reliable performance of the instrument is validated using Hanna’s exclusive Cal Check system and our ready-made, NiST traceable chlorine standards. For turbidity, a two, three or four-point calibration is available using pre-set or user defined standards. Frequent Calibration isn’t necessary as the system compensates for variations in the intensity of the light source.
The instruments’ Good Laboratory Practice functions allow traceability of calibration conditions including the time, date and last calibration points.
|Range||0.00 to 9.99; 10.0 to 99.9 and 100 to 1000 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 NTU|
|Accuracy||±2% of reading plus 0.02 NTU|
|Repeatability||±1% of reading or 0.02 NTU, whichever is greater|
|Stray Light||< 0.02 NTU|
|Typical EMC Deviation||±0.05 NTU|
|Light Detection||Silicon Photocell|
|Method||Ratio Nephelometric Method (90°), ratio of scattered and transmitted light;Adaptation of the USEPA Method 180.1 and Standard Method 2130 B.|
|Measuring mode||Normal, Average, Continuous|
|Turbidity Standards||1, 10, 100 and 750 NTU|
|Calibration||Two, three or four-point calibration|
|Light Source||Tungsten filament lamp|
|Lamp life||Greater than 100,000 readings|