Optical and electro-chemical sensors for the measurement of dissolved oxygen with analog monitors or the modular and flexible IQ Sensor Net
- Features
- TriOxmatic® Digital D.O. Sensors
- FDO® Digital D.O. Sensors
- Documents
The correct choice of measuring technology for dissolved oxygen is very important for the performance capacity of a wastewater treatment plant. For decades, WTW has been doing pioneer work in the area of dissolved oxygen measuring technology. The result of consequent development processes, innovation and application-specific experience are online oxygen meters, which prove to offer highest precision, reliability and cost-effectiveness.
In addition to the proven analog and digital sensors of the 700 series, you will also get 701 sensors with all models with a quicker response time. In the product range of digital TriOxmatic® sensors, there is also a 702 sensors for trace measurement. All sensors have an integrated NTC temperature sensor for temperature compensation and can also be used for pipe installations by means of suitable replacement fittings.
The proven monitors of model series 170 and 296 have a PI/PF control algorithm. Their integrated lightning protection and the galvanized separated outputs offer high operational safety. With the IQ Sensor Net and the digital IQ sensors, there will be enormous flexibility in the design and later expansion of your measuring system. The calibration-free FDO® sensor will save you time, money and work effort.
| Type | TriOxmatic® 700 IQ (SW*) | TriOxmatic® 701 IQ | TriOxmatic® 702 IQ |
| Measuring method | Electrochemical | Electrochemical | Electrochemical |
| Measuring range (25 °C) | |||
| O2 concentration | 0.0 ... 60.0 mg/l | 0.00 ... 20.00 mg/l 0.0 ... 60.0 mg/l |
0 ... 2000 µg/l 0.00 ... 10.00 mg/l |
| O2 saturation | 0 ... 600 % |
0.0 ... 200.0 % 0 ... 600 % |
0 ... 110 % |
| Response time at 25 °C | t90: 180 s | t90: 30 s t99: 90 s |
t90: 30 s t99: 110 s |
| Minimum flow rate | 0.05 m/s | 0.23 m/s | 0.3 m/s |
| SensCheck | SensLeck (700 IQ) SensReg (700 IQ/700 IQ SW) |
SensLeck SensReg |
– SensReg |
| Signal output | Digital | Digital | Digital |
| Sensor memory for calibration values |
Yes | Yes | Yes |
| Power consumption | 0.2 Watt | 0.2 Watt | 0.2 Watt |
| Temp. measurement | Integrated NTC, 23 ... 140 °F (-5 °C ... +60 °C) | ||
| Temp. compensation | 32 ... 140 °F (0 °C ... +60 °C) | ||
| Maximum pressure | 10 bar (incl. sensor connection cable) | ||
| Ambient conditions | Operating temperature: 32 ... 140 °F (0 °C ... +60 °C) Storage temperature: 32 ... 149 °F (0 °C ... +65 °C) |
||
| Electrical connections | 2-wire shield cable with quick fastener to sensor | ||
| Input power | Powered by IQ Sensor Net | ||
| Translet voltag protection | Yes | ||
| EMI/RFI Conformance | EN 61326, Class B, FCC Class A; Intended for indispensable operation | ||
| Certifications | CE, cETL, ETL | ||
| Mechanical | Membrane head assembly, locking cap: POM | ||
| Sensor body: 316 Ti stainless steel | |||
| Protection rating: IP 68 | |||
| Dimensions (length x diameter) |
14.17 x 1.57 in. (360 x 40 mm); SW: 14.17 x 2.34 in. (360 x 59.5 mm) |
||
| incl. connection thread of SACIQ sensor connection cable | |||
| Weight (Approx.) |
1.46 lb (660 g, without sensor connection cable); SW: 2.58 lb (1,170 g) |
||
| Guaranty | 2 years for sensor acc. § 10 AGB | ||
| Type | FDO® 700 IQ (SW*) | FDO® 701 IQ (SW*) |
| Measuring method | Optical | Optical |
| Measuring range (25 °C) | ||
| O2 concentration | 0 ... 20.00 mg/l (0 ... 20.00 ppm) |
|
| O2 saturation | 0 ... 200.0% | |
| Response time at 25 °C | t90: <150 s t95: <200 s |
t90: <60 s t95: <80 s |
| Minimum flow rate | No drift required | |
| SensCheck | Monitoring of membrane function | |
| Signal output | Digital | Digital |
| Sensor memory for calibration values |
Yes | Yes (factory calibrated) |
| Power consumption | 0.2 Watt | 0.7 Watt |
| Temp. measurement | Integrated NTC, 23 ... 140 °F (-5 °C ... +60 °C) | |
| Temp. compensation | 23 ... 122 °F (-5 °C ... +50° C) | |
| Maximum pressure | 10 bar (incl. sensor connection cable) | |
| Ambient conditions | ||
| Operating temperature: | 23 ... 122 °F (-5 °C ... +50 °C) |
23 ... 104 °F (-5 °C ... +40 °C) |
| Storage temperature: | -13 ... 122 °F (-25 °C ... +50 °C) |
-13 ... 104 °F (-25 °C ... +40 °C) |
| Electrical connections | 2-wire shield cable with quick fastener to sensor | |
| Input power | Powered by IQ Sensor Net | |
| Translet voltag protection | Yes | |
| EMI/RFI Conformance | EN 61326, Class B, FCC Class A; Intended for indispensable operation | |
| Certifications | CE, cETL, ETL | |
| Mechanical | Sensor cap, fixation: POM, PVC, silicone, PMMA housing shaft: VA steel 1.4571 protection type IP 68 |
|
| Dimensions (length x diameter) |
15.75 x 1.57 in. (400 x 40 mm) SW: 15.75 x 2.34 in. (400 x 59.5 mm) |
|
| incl. connection thread of SACIQ sensor connection cable | ||
| Weight (Approx.) |
1.98 lb (900 g) SW: 3.31 lb (1.5 kg) |
|
| Guaranty | 2 years for sensor acc. § 10 AGB | |
- Accurate Dissolved Oxygen Measurement in Challenging Conditions
- Application Note: Activated Sludge Optimisation
- Application Note: Optimise Aeration Performance
- Brochure: IQ SensorNet - The Range
- Brochure: WTW Online D.O. Measurement
- Optical DO Sensor Reduces Energy
- Spec Sheet: WTW IQ SensorNet FDO® Optical Dissolved Oxygen Sensor
- WTW Lab and Field Instrumentation