The HI 98713 instrument measures the turbidity of a sample in the 0.00 to 1000 FTU (Formazin Turbidity Units) range. An effective algorithm calculates and converts the detectors output in FTU. Depending on the measured probe and needed accuracy, normal measurement, continuous measurement, or signal averaging measurement can be selected.

The instrument is based on a state-of-the-art optical system, which guarantees accurate results. The optical system, consisting in an infrared LED and two detectors (scattered and transmitted light), assures long term stability and minimizes stray light and color interferences. It also compensates for variations in intensity of the LED, minimizing the need of frequent calibration.

The 25 mm round cuvets made from special optical glass guarantee the repeatability and consistency of the measurements. Calibration can be easily performed at any time in two, three or four points (<0.1, 15, 100 and 750 FTU-adjustable calibration points), using the supplied or user prepared standards. HI 98713 has complete GLP (Good Laboratory Practice) functions that allows traceability of the calibration conditions. The last calibration points, time and date can be checked at any time by a single touch.

HI 98713 has a very user-friendly interface, with an easy to read, large LCD (Liquid Crystal Display). The displayed codes guide the user step by step with routine operation and through calibration. Confirmation and acoustic signals help the user during instrument operation. The HI 98713 turbidimeter is a truly splash proof portable instrument. It is supplied with a rigid carrying case that offers protection for harsh environments.

One battery set is enough for at least 1500 measurements. The battery charging percentage and low battery condition are displayed on the LCD to avoid unexpected battery failure. In order to save the battery life, the instrument has an auto shut-off feature and will turn off after 15 minutes of non-use. In addition, the instrument is equipped with backlight and the current time is continuously displayed on the LCD.

The instrument also provides a logging function. Up to 200 measurements can be stored in the internal memory and consulted at any time. Data can be downloaded to a PC for storing or further analysis through one of the two available ports: RS232 or USB.

For advanced field applications, the HI 98713 turbidity meter can be equipped with the optional Tag Identification System (TIS) that makes data collecting and management simpler than ever.