Optical IDS D.O. sensor for portable MultiLine® IDS and InoLab® Multi IDS benchtop meters. Measures the dissolved oxygen according DIN ISO 17289:2014-12. For applications in the lab and in process, outdoor and waste water treatment plants. Low maintenance (t99 < 60 s). No oxygen consumption, with inclined membrane for avoiding air bubbles. Factory calibrated membrane with smart chip. Built-in NTC 30 kOhm temperature sensor.