Smart, reliable, accurate DO measurement made easy.

Designed to work the way you want to work, the new ADS420 utilizes the latest generation of drift-free optical measurement technology – minimizing operational costs and removing the need for routine calibration.

Featuring ABB’s EZLink technology, users of ABB’s DO system benefit from plug-and-play connectivity, automatic sensor recognition / set-up, predictive diagnostics and enhanced measurement accuracy.

Easy to use

• plug-and-play digital sensor connection
• automatic sensor recognition and set-up
• advanced predictive maintenance diagnostics
• supplied factory-calibrated ready for use

Accurate and reliable

• dynamic luminescence quenching technology eliminates sensor drift
• fast response time with patented signal processing
• robust construction provides abrasion and UV resistance

US EPA Approved

• US EPA approved technology for use in Clean Water Act programs
• suitable for use by NPDES permit holders for monitoring influent,
effluent and treatment processes

Low cost of ownership

• long-life SmartCap preloaded with factory calibration coefficients
• no need for on-site calibration
• fully automatic air cleaning system available

Flexible installation options

• suitable for tank, open channel or T-piece installation
• range of handrail or wall mounting kits
• suitable for saline applications

• Measurement performance (dissolved oxygen) Range

  – 0 to 50 ppm (0 to 50 mg/l)
  – 0 to 450 % saturation at 25 °C and 760 mm Hg

• Accuracy / maximum measured error

  – ±0.1 ppm (0 to 8 ppm)
  – ±0.2 ppm (8 to 20 ppm)
  – ±10 % of reading (20 to 50 ppm)

• Resolution

  – 0.01 ppm (mg/l)

• Response time

  – T90 <45 sec; T95 <60 sec @ 25 °C (77 °F)

• Measurement performance (temperature) Range

  – 0 to 50 °C (32 to 122 °F)

• Accuracy

  ±0.1 °C (0.18 °F)

• Maintenance

  – Sensor cap replacement
  24 months

• Environmental data

  – Operating temperature range
  0 to 50 °C (32 to 122 °F)
  – Pressure limit
  10.3 bar (150 psi) maximum
  – Flow rate
  None required
  – Storage temperature range
  –5 to 60° C (23 to 140° F)