optical technology

Traditional DO sensors most commonly use the Clark Cell/Membrane technology which has drawbacks that include maintenance issues, membrane fouling, calibration instability and worst of all, oxygen consumption.

The optical technology inherent in the AquaPlus™ Probe eliminates all of these problems. These probes are membrane free, resistant to fouling, offer long term stability and they do not consume oxygen.

Additionally, in order to acquire accurate readings, the AquaPlus™ Probe includes sensors which measure temperature and conductivity EC (salinity). Barometric pressure is measured using the hand held Aquameter.

dynamic luminescence

The Aquaread AquaPlus™ probe works on the principle of Dynamic Luminescence Quenching. A gas permeable material known as a luminophore is excited with short bursts of blue light which causes molecules within the luminophore to emit red photons. By measuring the delay in the return of the red photons with respect to the blue excitation, the level of dissolved oxygen present can be determined.

PARAMETERS MEASURED WITH THE AquaPlus™ Probe & DO-200 Meter
√	mg/L Dissolved Oxygen (DO)	√	Absolute EC
√	Electrical Conductivity (EC)	√	Latitude
√	Total Dissolved Solids (TDS)	√	Longitude
√	Resistivity	√	Height above MSL
√	Salinity	√	OSGB Grid Reference
√	Seawater Specific Gravity	√	Time
√	Atmospheric Pressure	√	Date
√	% Saturation DO	√	Temperature

features

• Fast response time
• No cross sensitivity to sulphide, chloride, carbon dioxide or ammonia
• Stirring or water flow are not required for accurate readings
• No warm up time
• No soaking or probe conditioning required
• User replaceable Optical DO sensor cap
• Up to 2 years Optical DO sensor cap life
• 4 ring, variable frequency EC sensor
• Rugged stainless steel & marine grade aluminium construction
• Resin filled and sealed to IP68 for permanent immersion
• Threaded mounting boss with nuts
• Removable protective sleeve
• Just 24mm (0.94”) diameter with sleeve fitted
• 3m (10') cable as standard extendable up to 100m (330')
• Calibration data stored on the Probe to allow mix & match of Probes and Meters
• Compatible with existing Aquaread™Aquameters™
• Rugged Flowcell available
• Data converter available for stand-alone telemetry use or integration to industrial control systems
• Two year warranty*

Extension cables are available in lengths of 5m (16'), 10m (32') & 30m (98'):

• Complete with in-line sockets
• Stackable to a total length of 100m (330')

 

calibration

Every AquaPlus™ Probe is delivered fully calibrated and ready to use out of the box. All calibration data is stored on-board the probe so that probes and meters can be mixed and matched without any problems.

recalibration

Recalibration is simple. For regular field use, AQUAREAD™ provides an all-in-one calibration solution, RAPIDCAL™, allowing easy one step calibration. Full calibration of each individual electrode is also straightforward, by following simple instructions on the AquaPlus™ Meter.

IMPORTANT!

The sleeve on the AquaPlus™ Probe forms an integral part of the measurement system for both EC and turbidity. The AquaPlus™ Probe will not function properly without both halves of the sleeve fitted.