WSDO1001 Pure Water DO Sensor

The WSDO1001 pure water DO sensor is a dissolved oxygen sensor designed for ppb-level measurement, with corrosion resistance and shape retention. It works on the polarographic principle: the electrodes are polarised by a constant voltage, oxygen in the water diffuses through the membrane and gives up its electrons at the cathode, and this electrical change is detected and converted into a DO reading. A silicone rubber permeable membrane backed by a steel gauze and a 316L stainless steel housing make it suited to continuous trace-oxygen monitoring in boiler water and power plant water circuits.

Features

• Polarographic dissolved oxygen electrode for trace oxygen
• Two measuring ranges: 0 … 100 µg/l and 0 … 20 mg/l
• Accuracy ±1 ppb with a lower detection limit of 0.1 µg/l at 20 °C
• Silicone rubber permeable membrane with steel gauze
• Collision resistant, corrosion resistant, high-temperature resistant, with shape retention
• Platinum cathode and Ag/AgCl anode in 0.1 M KCl electrolyte
• 316L stainless steel housing
• Drift below 3% per month, 60-day calibration interval
• Sensor life of about 3 years

How it works

• A 0.7 V polarisation voltage is applied across the electrodes (polarisation time > 8 h)
• Oxygen diffuses through the membrane and gives up its electrons
• The resulting current is converted into a DO value, with temperature compensation

Applications

• Boiler water and condensate
• Thermal power plants
• Power plant desalted water
• Other locations with trace oxygen content

LKS supplies the WSDO1001 pure water DO sensor in Malaysia, with installation, calibration and after-sales support. Contact our engineers for selection and a quotation.