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About the RDO-X Stainless Steel Dissoved Oxygen Sensor
The RDO-X Stainless Steel Dissolved Oxygen Sensor is a rugged, reliable instrument designed to deliver
accurate dissolved oxygen (DO) data across a wide measurement range and to reduce maintenance costs.
The probe features the latest optical technology for DO measurement.
This kind of optical technology requires very few consumables:
• No membrane replacement
• No electrolyte
The RDO cap contains the optically sensitive material. Replace the RDO cap according to your site needs, or
approximately once every 2 years.
The sensor operates with optical luminescence measurement technology described in Standard Method
4500-O and In-Situ Methods 1002-8-2009, 1003-8-2009, 1004-8-2009 (EPA Approved).
When the probe initiates a reading, an LED emits blue light, which excites lumiphore molecules in the
sensing element. Excited lumiphore molecules emit red light, which is detected by a photodiode. Oxygen
molecules quench the excited lumiphore molecules and prevent the emission of red light—a process called
"dynamic luminescence quenching. " Determination of DO concentration by luminescence quenching has a
linear response over a range of concentrations.
Lumiphore molecules are excited by blue light and then emit red light, which is
detected by a photodiode. Optical electronics report DO concentration in mg/L.
1-970-498-1500
Introduction
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