WTW SensoLyt 700 IQ

FDO 700/701 IQ

Digital, optical, calibration free – dissolved oxygen senors 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.

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

FDO 701 IQ is just like the 700 however it offers a faster response time. Both the 700 and 701 have a sea water (SW) version. 

The sea water model (FDO® 700 IQ SW) is optimised for use in special media: All wetted parts are made of titanium and plastic and are therefore extremely resistant to corrosion

  • Calibration and flow free
  • Insensitive to air bubbles
  • Low usage costs
  • No extra installation equipment required 
  • Robust design withstands pressure up to 10 bar 
  • 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: FDO 700 IQ & 700 SW*  –   t90: < 150 s, t95: < 200 s. FDO 701 & 701 SW*  –  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: FDO 700 IQ & 700 SW*  –  23 °F … 122 °F (-5 °C … +50 °C), -13 °F … 122 °F (-25 °C … +50 °C). FDO 701 & 701 SW*  –  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): 700  –  1.98 lb (900 g). 700 SW*  –  3.31 lb (1.5 kg). 701  –  1.98 lb (900 g). 701 SW*  –  3.31 lb (1.5 kg)
  • Warranty: 2 years for defects in quality
  • SW* Sensor as sea water model (with plastic arming (POM))