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.

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 minimizes interference that can be caused by air bubbles
• Universal protective armoring available
• Low power consumption and maintenance
• Simple to integrate and operate
• One year sensor life

Full Details Here