HI 98703 and HI 93414 utilize an EPA compliant tungsten light source and state-of-the-art optical system that allow consistently reliable and accurate measurements of turbidity and free/total chlorine. Users will appreciate this accuracy particularly at very low turbidity levels. HI 93414 meets the requirements of EPA and Standard Methods for Turbidity and Colorimetric Chlorine Measurements.
Turbidity is measured up to 1000 NTU and free or total chlorine measurements can be made in the 0.00 to 5.00 mg/L (ppm) range. To meet EPA reporting requirements these instruments have an EPA compliance reading mode.
Depending on the measured sample and required accuracy, users can select normal measurement, continuous measurement or signal averaging.
Both models feature Hanna’s new Tag Identification System (T.I.S.) which allows users to record the time and place at unlimited specific measurement locations.
Logged data can be downloaded through either USB or RS 232.
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 intensity of the light source. The instruments’ Good Laboratory Practice functions allow traceability of calibration conditions including the time, date and last calibration points.

Features

Turbidity of water is an optical property that causes light to be scattered rather than transmitted. The scattering of light that passes through a liquid is primarily caused by suspended solids. Higher turbidity means greater amounts of scattered light. No solution will have zero turbidity because even the molecules in a very pure fluid scatter light to a certain degree. The USEPA Method 180.1 specifies the key parameters for optical systems to measure drinking, saline and surface water turbidity in a 0 to 40 NTU range, using the nephelometric method.
HI 98703 and HI 93414 are designed to meet or exceed the criteria specified by the USEPA Method 180.1 and Standard Method 2130 B. Model HI 93414 is based on a state-of-the-art optical system that guarantees both high performance and reliable results: this optical system includes a tungsten filament lamp, a scattered light detector and a transmitted light detector.