Description

The AP-6000 & AP-7000 water quality probes are multi-parameter sensor and comes pre-fitted with probes covering pH, ORP, Conductivity, TDS, SSG, Resistivity, Salinity, Dissolved Oxygen, Temperature and Depth Sensor. Each AP-6000 probe comes with four empty sockets, and the AP-7000 has six empty sockets. These allow for the addition of Optical, or Ion Selective Electrode (ISE) sensors. This page covers the 8 Optical Electrodes that can be fitted to any of these Aux Ports on the AquaProbes. Additional parameters covered by the Optical Electrodes are: Turbidity; Chlorophyll; Blue Green Algae; Rhodamine; Fluorescein; Refined Oil; or CDOM/FDOM.

The table below covers the available parameters, with links to get more details on the parameter for each probe.

Optical Electrode Options

Fluorescence measurement techniques are not ideal for quantitative measurement and it is therefore impossible to specify an absolute accuracy. The accuracy figures quoted above represent the equipment’s capability at the calibration points at 25°C. In order to obtain accurate results, data obtained with a fluorescent electrode in the field must be post-calibrated with data from standard laboratory analysis of grab samples acquired during the study.

Automatic Cleaning Mechanisms on AquaProbe

Both the AP-6000 and AP-7000 AquaProbes include automatic cleaning mechanisms which are incredibly beneficial for any optical sensor. The brush and wipers are critical because they:

• Prevent Biofouling Build-up: By periodically wiping the optical surfaces, they physically remove algae, biofilm, and other organic matter before it can significantly impact readings. This is especially crucial for long-term deployments.
• Dislodge Air Bubbles: The wiping action effectively dislodges any trapped air bubbles that might cling to the sensor’s surface, ensuring a clear path for light transmission and reception. Air bubbles are a common issue in turbulent waters or when probes are initially deployed.
• Maintain Accuracy: By keeping the optical windows clean, the cleaning mechanism ensures the sensor’s readings remain accurate and reliable over extended periods, reducing the need for frequent manual cleaning and site visits.