DISSOLVED OXYGEN SENSOR DO90 – ECD

Product Type: DISSOLVED OXYGEN SENSOR

Model: DO90

Manufacturer: ECD (USA)

Application:

   The Model DO90 Trace DO2 is designed for the continuous measurement of trace levels of dissolved oxygen in aqueous systems. The primary application of the Model DO90 trace dissolved oxygen sensor is in the monitoring of boiler feedwater. Oxygen should only be present in trace quantities, excessive concentrations of oxygen can result in corrosion damage to the components of the Steam Cycle.

Specifications:

• Measuring principle:Galvanic, Silver cathode, Lead anode, self polarizing
• Measured Parameter: Oxygen partial pressure-proportional current signal
• Measuring Range: 0.001 … 20.00 mg/l or ppm/ppb auto-ranging
• Process Temperature Range: –5 °C … 50 °C
• Process pressure range: 0-15 psi maximum overpressure, Vacuum operation is not permitted
• Slope: approx. 1.5nA/ppbO2 at 20 °C and 1013 hPa
• Temperature Compensation: NTC temperature sensor 100 kΩ, 0 … 50 °C
• Response time: t90: 30 sec / t99: 90 sec
• Polarization time: < 60 minutes
• Minimum Flow Rate: 200 ml/min with PN 1000008-1 flow cell
• Drift: With continuous polarization: < 1% / month
• Sensor body: Flanged stainless steel AISI 316 Ti
• Electrode body: PEEK
• Membrane: PFA Teflon®
• Cathode: Silver
• Anode: Lead
• Process Connection: ¼” 316 SS tube fittings
• Electrical connection (transmitter side): Digital signal on a shielded 4-wire cable

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