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The HydroSense 2410 is the engineered combination of three unique designs by Arjay. The sensing chamber contributes a continuous controlled water sample while the optical sensor package hovers above the passing stream. The Arjay controller then monitors the multiple signals to provide a reliable ppm concentration output.

The HydroSense 2410 employs a unique flow through chamber and non-contacting fluorescence technology to provide on-line monitoring of hydrocarbons in water. The industrial grade field design makes this unit ideal for process and effluent monitoring of industrial and municipal sites.

A continuous flow of process or effluent water passes through the sensing chamber and gravity discards to drain (or to a sump for return to the process). As it vertically passes down the specially designed glass tile, an ultraviolet light source is beamed into the moving water from the lamp/filter assembly hovering above. This is referred to as excitation of the sample. Contaminating hydrocarbon molecules return this energy back out of the water at a higher wavelength that is unique to their chemical make-up. This emission is monitored and a ppm level of hydrocarbons is determined.

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All of this is achieved without contacting the water, which eliminates the need for mechanical or sensor compensation due to debris, scum, or scale build-up. Additionally, the flow tile design minimizes the affect of suspended solids interference that can typically distort sensor readings.

The control monitor is mounted on a common backplate with the chamber for ease of installation and use. Should remote mounting be more appropriate to the application, the controller can easily be removed from this plate and mounted up to 50 meters from the chamber. The monitor provides the operator with an LCD indication of the ppm level of hydrocarbons, two adjustable alarm relays, and a 4-20 mA non-isolated output (proportional to the user determined range). An RS-485 communication is available for applications that have been appropriately interfaced.

Calibration is easily completed using actual flow conditions and drawing two discrete samples for lab analysis. The readily accessible lamp and flow tile mean no down time during routine checks or maintenance procedures.

THE RESULTS

• Continuous = 24 hour a day monitoring (no sample draws)
• Non-contact = minimal maintenance, no moving parts
• On-line = no lag time
• Fluorescence = selective to hydrocarbon contaminents
• Instantaneous = immediate response to process conditions

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