FDO® 700 IQ

Optical working D.O. sensor for the measuring and control of oxygen concentration in the biological cleaning process of wastewater plants, no flow required and H2S insensitive.

Digital, optical, calibration-free - dissolved oxygen sensors for the IQ SENSOR NET Calibration-free, reliable, DIN compliant - the optical FDO® oxygen sensors for the IQ SENSOR NET to regulate biological cleaning steps:

•Calibration and flow free

•Insensitive to air bubbles

•Low usage costs

FDO® sensors are the perfect solution for measuring dissolved oxygen. In addition to being free of calibration and flow, with their 45° membrane, they are also insensitive to air bubbles. Therefore, you will not require any additional installation equipment. The robust design of this sensors allows the use with an overpressure of up to 10 bar. The special membrane has unique stability and thus ensures stable measured values.

The seawater model (FDO® 700 IQ SW) is optimized for use in special media: All wetted parts are made of titanium and plastic and are therefore extremely resistant to corrosion.
Technical DataDownload
Model FDO®700 IQ FDO® 700 IQ SW* FDO®701 IQ FDO® 701 IQ SW*
Order No. 201650 201652 201660 201653
Measuring method Optical
Measuring range (25 °C)
O2 concentration 0 … 20.00 mg/l
(0 … 20.00 ppm)
O2 saturation 0 … 200.0 %
Resolution
O2 concentration 0.01 mg/l
(0.01 ppm)
O2 saturation 0.1 %
Accuracy < 1 mg/l (ppm): ± 0.05 mg/l (ppm)
> 1mg/l (ppm): ± 0.1 mg/l (ppm)
Response time at 25 °C t90: < 150 s
t95: < 200 s
t90: < 60 s
t95: < 80 s
Minimum flow rate No flow required
SensCheck Monitoring of membrane function
Temp. measurement Integrated NTC, 23 °F … 140 °F (-5 °C … +60 °C) ± 0.5 °C
Temp. compensation 23 °F … 122 °F (-5 °C … +50 °C)
Pressure Resistance 10 bar (incl. sensor connection cable)
Ambient Conditions 23 °F … 122 °F (-5 °C … +50 °C)
-13 °F … 122 °F (-25 °C … +50 °C)
23 °F … 104 °F (-5 °C … +40 °C)
-13 °F … 104 °F (-25 °C … +40 °C)
Electrical connections 2-wire shield cable with quick fastener to sensor
Electromagnetic Compatibility EN 61326, Class B, FCC Class A;
Intended for indispensable operation
Certifications CE, cETL, ETL
Mechanical Sensor cap, fixation: POM, PVC, silicone, PMMA
sensor body: VA stainless steel 1.4571
protection type IP 68
Weight (without cable) 1.98 lb (900 g) 3.31 lb (1.5 kg) 1.98 lb (900 g) 3.31 lb (1.5 kg)
* SW: Sensor as sea water model (with plastic arming (POM))