HI 98703C เครื่องวัดความขุ่นแบบภาคสนาม HANNA
HANNA’s new 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.