Optical digital oxygen sensor for applications in the lab and process, field and wastewater treatment systems - low-maintenance, quick and wireless. Features: • Saves time and money – low-maintenance & quick (t99 < 60s) • Flow-free with beveled membrane • Factory calibrated sensor cap with smart chip • Robust and waterproof • Extremely fast (t99 < 60s) • Free of incident flow with beveled membrane • Low maintenance • The FDO® 925 is especially suited for lab and process thanks to its compact size. • The flow-free, easy to clean beveled membrane allows it to be used in containers with low sample volumes. Also, low oxygen concentrations below 1 mg/l can be shown exactly. • WTW's proven FDO® 925 is now available as sustainable plug head version. The universal plug head fits the sensor with wireless functionality – disturbing cables are no longer required. • Furthermore it can be connected to AS/IDS-x cables with lengths of up to 100 m. • With this new technology WTW significantly expands the range of applications and the measuring comfort of its optical dissolved oxygen sensors. Specifications: • Concentration: 0.00…20.00 mg/l ± 0.5 % of value • Saturation: 0.0 … 200.0 %± 0.5 % of value • Partial pressure: 0.0 to 400 hPa± 0.5 % of value • Temperature: 0 … 50.0 °C ± 0.2 °C