For separated Oil-on-Water applications, Arjay offers the Hydrocarbon Float Sensor. This floating sensor monitors the surface of water in sumps, tanks, and lagoons to alert when oil has separated to the water surface. This is typically used to alert of spills or control pumps.

The 2852-HCF sensor monitors the surface dielectric and locks in on the capacitance of the water. Oil that separates to the surface changes the capacitance field and activates the relay alarms.

This unit is typically used in sumps or containments where oil is not typically present. Normal sheens will not alarm but an upstream leak or spill that accumulates in the sump will alarm the monitor. The floating design allows the unit to track the changing water level in the sump and immediately alert operators, pumps or valves if there is an accumulation of oils.

Features and Benefits

• stable tri-float design follows level changes
• adjustable time delay and sensitivity to eliminate nuisance alarms
• remote electronics via standard twisted pair
• sensor available Intrinsically Safe for Hazardous Locations
• waterproof PVC and SS wetted parts allow for use in harsh environments
• unit also alarms on dry sump conditions to shut down pumps
• capacitance technology responds to all types of oils and separated liquids of similar dielectrics
• alarms at a minimum of 2 mm surface oil, can be desensitized to 25mm oil
• Floating sensor follows changing water levels
• Alarms on petroleum, synthetic, and vegetable oils
• Potted stable sensor eliminates nuisance alarms

Continuous monitoring of separated oil thickness on a water surface

The 4100-HCF monitors a floating sensor on the water surface to indicate the thickness of separated oil. An LCD display of the thickness, analog output and relay alarms are standard.

The 4100-HCF float sensor monitors the capacitance field of the water surface.

As the oil accumulates on the surface, the sensor capacitance changes. This interface signal is used to provide outputs, displays and relay control.

Optional Interfaces

Analog Output 4-20 mA non-isolated
Communication RS-485 Modbus

Continuous profiling of oil/water interface and emulsions in tanks

Multiple capacitance probes staggered in an oil/water separator will provide a profile of the emulsion location and thickness.

The 4100-PRO uses multiple sensing probes to measure the capacitance field at distinct points within the tank.

The resulting profile can be used to track the vertical location of an interface/rag layer and the emulsion thickness. The data can be used for flow control, diluent and other chemical injection, and alarms of impending control excursions. This instrument is ideal for trending of process conditions to maximize your oil/water separation efficiency.

Optional Interfaces

Analog Output 4-20 mA non-isolated
Communication RS-485 Modbus

The HydroSense 4410-LMP Oil in Water Analyser offers continuous on-line monitoring for ppm concentrations of petroleum oils in effluent and produced water without chemicals or lag time. A non-contacting sensor design minimizes system maintenance.

The re-designed 4410-LMP replaces the old 2410-LMP and is suitable for Class I, Zone 2 locations without the use of a purge.

The 4410-LMP is the engineered combination of three unique designs:

• The sensing chamber contributres a continuous controlled water sample
• While the optical sensor package hovers above the passing strean
• The Arjay controller then monitors the multiple signals to provide a reliable ppm concentration output

This Oil in Water Analyser uses a UV fluorescence technique to target the aromatic component of the oil contamination. Through a site calibration this aromatic tag provides an indication relative to total oil. A continuous sample flow is tapped or pumped off the process line and directed through the HydroSense chamber. It passes behind the noncontacting UV light source and is targeted with filtered light energy. The soluble and emulsified oils in the water will excite from this light energy and fluoresce light energy back out of the water at a signature wavelength. The intensity of light energy at this wavelength is measured to provide an indication of the ppm concentration.

Features & Benefits

• The special UV absorbing flow plate sheens the water over a large surface area. The resulting high surface area to depth ratio provides many benefits.
• The sensitivity to oil molecules is increased by maximizing the optical viewing area
• The minimal depth discourages oil molecules from ‘hiding’ behind particulates in the water
• The large lamp source targets the water from multiple angles to get a representative sampling of all oil
• The large sample target area ensures a representative and stable snapshot of the water conditions
• The unit can tolerate suspended solids up to 400 mg/lnon-contacting optics minimizes maintenance
• Non-contacting sensor design minimizes system maintenance
• Fluorescence technology is selective to petroleum hydrocarbons by targeting their aromatic faction
• Continuous on-line monitoring without chemicals or lag time
• Compensation for temperature and lamp degradation minimizes recalibration requirements
• Alarm warns of impending lamp replacement
• Long life lamp expectancy of 18 months
• Continuous on-line monitoring reads the water 50 times/second with an averaged display update every one second
• No consumables or chemical used
• Sample flow gravity outfalls to drain
• Available with CSA Zone 2 approval or with NFPA/ATEX Pressurization Systems for Zone 2
• Designed for harsh environments with a 316 SS housing
• No tools necessary for routine maintenance or lamp replacement
• The flow or power does not require to be turned off during routine maintenance
• Flow chamber diversion system conditions and clarifies sample
• Multi-point calibration available to customize response curves
• Overflow baffle de-aerates bubbles
• Certified to IMO MPEC.107(49) when interfaced with site logging and by-pass requirements

The HydroSense 4410-OCM Oil in Water Monitor continuously monitors a clean water sample for petroleum hydrocarbon concentrations. The display, signal output, and alarm can be configured within the 0-250 ppm range. On-line monitoring for ppm petroleum oil in industrial filtered water and cooling water. The HydroSense 4410 offers a high accuracy approach to monitoring low concentrations of free and soluble oils in water. Combining many unique design features into a compact package makes this an ideal solution to monitoring for oil contamination in your water system. This Oil in Water Monitor uses a UV fluorescence technique to target the aromatic component of the oil contamination. Through a site calibration, this aromatic tag is able to provide an indication relative to total oil. A slip stream approach directs a continuous sample flow through the HydroSense unit and back into the process stream. While it passes through the sample cell, filtered UV light is targeted in the water. The soluble and emulsified oils in the water will excite from this light energy and fluoresce light energy back out of the water at a signature wavelength. The intensity of light energy at this wavelength is measured to provide an indication of the ppm concentration.

The FluoroCheck II is a benchtop and transportable unit for discrete sample measurements of ppm hydrocarbons in water.

Direct water samples for screening or an EPA approved hexane oil extraction method may be used.

Benchtop and field monitoring of petroleum oils in:

• wastewater and groundwater
• industrial effluents
• cooling water
• produced water

The FluoroCheck II offers a fast and easy approach to the measurement of hydrocarbon oils in water. Filtered light energy targets the aromatic component of the water sample and measures the hydrocarbon fluorescence. Through an Arjay or site specific calibration, this aromatic tag is correlated to a total oil reading of your sample.

Arjay offers two test modes in one instrument; letting you determine the most suitable approach for your testing needs. You can choose from the factory preset calibrations for immediate on-site use or do your own calibration specific to your site. You can even run routine solvent-free tests and easily switch to a solvent extraction when a more selective test is warranted. All tests use disposable cuvets to eliminate cross-contamination and cleaning issues.

The HydroSense 4420-OCM continuously monitors a clean water sample for oil leaks.

The display, signal output, and alarm can be configured within the 0-250 ppm range. On-line alarm for oil presence in filtered effluent and cooling water

The HydroSense 4420-OCM offers a low-cost approach to monitoring ppm concentrations of emulsified free oils in clean water. Combining many unique design features into a compact package makes this an ideal solution to monitoring for oil leaks in your water system.

The HydroSense 4420-OCM uses a light scatter technique to respond to oil contamination in the water.

A slip stream approach directs a continuous sample flow through the HydroSense unit and back into the process stream. While it passes through the sample cell a controlled light source is directed into the water. The emulsified oils in the water will scatter the light toward the light sensors placed strategically around the cell. The intensity of light energy is measured to provide an indication of the ppm concentration.

Continuous monitoring for % concentration of water in oil emulsions

The 4100-OWM is used for monitoring as the water phase changes to oil in a tank or pipe. A probe inserted into a tank or pipe measures the capacitance field. This is ideal for general monitoring of oils and other liquid phase changes in a process.

The 4100-OWM sensing probe monitors the capacitance field around the probe within a concentric shield, tank or pipe.

The emulsion characteristics of water to oil is not strictly linear and the Arjay controller allows for a 5 point calibration to enhance accuracy over an extended range. This instrument is ideal for general monitoring and trending of process conditions.

Optional Interfaces

• Analog Output 4-20 mA non-isolated
• Communication RS-485 Modbus