Optical IQ Dissolved Oxygen Sensors - WTW
Digital, optical, calibration-free oxygen sensors
Reliable, DIN-compliant – the optical FDO® oxygen sensors
• Calibration and flow-free
• Insensitive to air bubbles
• Low consumption costs
The FDO® sensors are the perfect solution for measuring dissolved oxygen. In addition to freedom from calibration and flow, they are also insensitive to air bubbles thanks to their 45° membrane. You therefore do not need any additional installation equipment. The robust workmanship of the sensor allows it to be used even up to an overpressure of 10 bar. The special membrane is characterized by unique stability and thus guarantees stable measured values.
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Models
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FDO® 700 IQ
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FDO® 700 IQ SW*
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FDO® 701 IQ
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FDO® 701 IQ SW*
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item number
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201650
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201652
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201660
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201653
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Measuring principle
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optically
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Measuring ranges (25 °C)
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O 2 concentration
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0 ... 20.00 mg/l
(0 ... 20.00 ppm)
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O 2 saturation
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0 ... 200.0%
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resolution
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O 2 concentration
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0.01 mg/l
(0.01 ppm)
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O 2 saturation
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0.1%
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accuracy
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< 1 mg/l (ppm): ± 0.05 mg/l (ppm)
> 1mg/l (ppm): ± 0.1 mg/l (ppm)
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Response time at 25°C
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t 90 : < 150 s
t 95 : < 200 s
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t 90 : < 60 s
t 95 : < 80 s
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Minimum flow
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No flow required
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SensCheck
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Monitoring membrane function
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Temperature measurement
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Integrated NTC, -5 °C ... +60 °C, ± 0.5 °C
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Temp. compensation
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-5°C … +50°C
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Compressive strength
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Maximum 10 bar (including sensor connection cable)
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Environmental conditions
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-5 °C … +50 °C
-25 °C … +50 °C
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-5 °C … +40 °C
-25 °C … +40 °C
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Electrical connection
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2-core shielded cable with quick release on the sensor
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Electromagnetic
compatibility
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EN 61326, Emission: Class B, FCC Class A
Immunity for essential operation
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Test mark
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CE, cETL, ETL
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mechanics
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Sensor cap, fixing ring: POM, PVC, silicone, PMMA
Housing shaft: V4A stainless steel 1.4571
Protection class IP 68
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Weight (without cable)
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Approx. 900g
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Approx. 1,500 g
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Approx. 900g
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Approx. 1,500 g
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guarantee
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2 years for material defects in accordance with Section 10 General Terms and Conditions
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