.

Royce Technologies 9200 Online Galanvic Dissolved Oxygen Analyser

Part of Australia's most proven range of Dissolved Oxygen analysers with excellent long term references from dozens of satisfied users:

• Patented self-cleaning electro-chemical cleaning for sensor
• Microprocessor based electronics
• Range 0-99.9 PPM NS % saturation compensation
• 240V AC and 24V DC operating supply voltages
• 4 x programmable relays for error alarm, jet-clean and set point
• 2 x isolated 4-20mA or 0-20mA outputs for dissolved oxygen and temperature
• Use with Royce Technologies 96A Galvanic Oxygen Sensor

Applications:    Waste water treatment, industrial water treament, water quality / environmental assessment, combine purifying, live stock waste treatment

RWT Q45D Optical Dissolved Oxygen Monitor and Sensor

The RWT Series Q45D Dissolved Oxygen Monitor and Sensor provides reliable DO control in plants throughout the world. The unit utilises a galvanic membrane sensor designed to perform to exact standards in the most demanding applications.

The series now includes an optical dissolved oxygen sensor that reduced maintenance. The optical sensor provides continuous Dissolved Oxygen monitoring with virtually no servicing required.

About optical sensor technology for dissolved oxygen monitoring:

Optical DO sensors measure the rate of oxygen absorption with an optical signal generated within a membrane impregnated with a flourescent dye. The dye is excited by a pulse of light from an internal LED. This causes the dye to fluoresce or emit light of a different wave length.

The rate at which this emitted light decays is proportional to the molecular oxygen in the element. The higher the oxygen level - the faster the decay rate.

Benefits of optical DO monitoring sensors:

Optical Dissolved Oxygen sensors do not have internal electrolyte - so maintenance is limited to changing the optical element.

You will need to have Adobe Acrobat Reader to view our PDF documents. Click here to get it.

Parts Per Million Range Dissolved Oxygen Analyzers/Controllers

Why accurate dissolved oxygen monitoring is critical:

The aeration basin is one of the critical components in a wastewater treatment plant. This area of the plant forms the nitrification process of the wastewater treatment plant.

Nitrification is the conversion of ammonia (NH3) to nitrate (NO3). How is this done? This is a two-step  process that is done with oxygen and two types of bacteria, Nitrosomonas and Nitrobacter, known collectively as the nitrifiers.  Ammonia (NH3) + Oxygen (O2) + Alkalinity + Nitrosomonas = Nitrite (NO2).  Nitrite (NO2) + Oxygen(O2) + Alkalinity + Nitrobacter = Nitrate (NO3) Nitrite (NO2) is the unstable form of nitrogen and is easily converted because it does not wish to be in this form. The total conversion of ammonia (NH3) to nitrate (N03) takes 4.6 parts oxygen and 7.1 parts alkalinity to convert 1 part ammonia (NH3).

The delivery of oxygen to this process is critical for the nitrification process. Reliable and accurate dissolved oxygen monitoring will deliver both process improvement and operational cost savings to the plant. By having reliable and accurate measurement from the dissolved oxygen system the values can form part of a closed loop control system to control blower operation. Control of the blowers through a closed loop control system ensures that energy costs associated with operating the blowers can be reduced. This can also translate into less ongoing costs of maintenance and component replacements to the blowers over time.

Operating costs for aeration in wastewater treatment plants can account for up to 70% of the running costs. Reliable, accurate and maintenance free dissolved oxygen measurement combined with closed loop control for the blowers can dramatically reduce this energy costs associated with blower operation and provide better control of the process. The Royce Technologies Galvanic Dissolved Oxygen Monitoring Systems are field proven over many years of operation to provide the results    expected by operators. The cleaning system offered by Royce Technologies ensures that the sensor operates accurately, reliably and without any attention by plant staff

Royce Technologies offer fast and accurate on-line and portable dissolved oxygen meter using both galvanic membrane and optical measurement technologies.