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Highly Accurate and Stable Optical Dissolved Oxygen Sensor - WQ-FDO

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• Dissolved Oxygen Accuracy: ± 0.5 % of value
• Dissolved Oxygen Repeatability: 0.01 ppm
• Temperature Accuracy: ±0.2°F (±0.1°C)
• Temperature Resolution: 0.02°F (0.01°C)
• Temperature Range: 32 to 122°F (0 to 50°C
• Max Pressure: 35 psi (25m/82ft water depth)
• Operating Voltage: 10-30 VDC
• Warm Up Time: 6 sec. min, 8 recommended

Model Number: WQ-FDO
Data Sheet:

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Product Specification

WQ-FDO Optical Dissolved Oxygen Sensor Description
The WQ-FDO Optical Dissolved Oxygen Transmitter is an instrument designed for measuring dissolved oxygen concentrations in liquids. The WQ-FDO Optical Dissolved Oxygen Transmitters were developed to meet different requirements ranging from surface water monitoring programs to harsh waste water applications. The optical dissolved oxygen transmitter has been specifically designed to meet the demanding requirements of the environmental monitoring and scientific research sectors, providing long term, accurate and reliable dissolved oxygen measurement. The WQ-FDO Optical Dissolved Oxygen Transmitter has extremely low power requirements and a 4-20 mA output making it ideal for incorporation into remote environmental monitoring installations.

WQ-FDO Optical Dissolved Oxygen Sensor Features
• Extremely fast and precise optical DO sensor - outstanding for field and lab applications
• Proven green light technology for long operation life of sensor
• Beveled membrane repells interference that can be caused by air bubbles
• Universal protective armoring available
• Low power consumption and low maintenance
• Simple to integrate and operate
• One year sensor life

WQ-FDO Optical Dissolved Oxygen Sensor Applications
Long and short term monitoring for streams, rivers, lakes, aquaculture, thermocline profiling, industrial outfalls, wastewater, scientific research, homeland security, the food and wine industry, and more.

WQ-FDO Optical Dissolved Oxygen Sensor Specifications

Dissolved Oxygen
Partial pressure:	0-400 mbar
Accuracy:	± 0.5 % of value
Repeatability:	0.01 ppm
Response time:	90% in less than 60 seconds
Sensor Drift:	Less than 1% per year
Temperature:	Compensated 32 to 122°F (0 to 50°C)
Temperature
Accuracy:	±0.2°F (±0.1°C)
Resolution:	0.02°F (0.01°C)
Range:	32 to 122°F (0 to 50°C
Max Pressure	35 psi (25m/82ft water depth)
Output	Dual 4-20 mA (Partial Pressure and Temperature)
Operating Voltage	10-30 VDC
Current Draw	24 mA plus both sensor outputs
Warm Up Time	6 sec. min, 8 recommended
Operating Temperature	32 to +122°F (0 to +50°C)
Sensor Construction	Acetyl, stainless steel, cast epoxy
Dimensions	0.86 inch dia. x 8 inch long (22mm dia. x 202mm long)
Weight	8 oz (227 g)

WQ-FDO Optical Dissolved Oxygen Sensor Ordering & Options

WQ-FDO Sensors
Order No.	Output Type
WQ-FDO	Includes 25 ft of cable. Does not include armoring.
WQ SC-FDO	Replaceable Membrane
WQEXC	Extra Sensor Cable, per foot (up to 500 ft)

Accessories
Order No.	Description
DD0505	Plastic Armor Housing, 1.89 inch (48 mm) dia.
DD0510	Stainless Steel Armor Housing, 1.89 inch (48 mm) dia.