Dissolved oxygen measuring instrument HANDY 3300

electronicwith digital probeprocess

Designed for dissolved oxygen measurements in basins channel and tanks, in biological treatment plants, in fish breeding, and for all spot DO measurements directly operated into the process, this analyser is composed of an immersion probe, an electronic unit and a connecting cable. The immersion probe includes a polarographic measuring system, made of Pt-Ag electrodes immersed in a specific electrolyte solution and separated from the process fluid by a PTFE membrane permeable to gaseous oxygen. The electrodes dimensions and the membrane characteristics have been defined in order to obtain a very good sensitivity and short response time even at few ppb concentrations. The probe is made of PVDF and is very sturdy; the cable is sealed into the probe and cable outlet is from watertight cable gland: so forth the probe can be immersed down to 5 m; the special reinforced cable-to-probe connection assures great protection against all possible mechanical stresses due to immersion and lifting of the probe operated using the cable. For this purpose the polyurethane cable, length 6 meters, is internally Kevlar reinforced. The portable, microprocessor based, electronic unit is very sturdy and handy, has a wide, good visibility, OLED display and a watertight membrane keypad. The instrument receives D.O. and temperature signal from the probe, operates the temperature compensation of the measure and displays D.O. value and sample temperature. Power supply is from rechargeable battery, 8,4 V, 170 mA/h (average autonomy is 1h 15min with lit display). The instrument accepts a 12 VDC auxiliary power supply (rear connector) that is also used to charge the battery.