HydroSense 4410-OCM Continuous Closed-Loop for Cleaned Water Applications

HydroSense 4410-OCM Continuous Closed-Loop for Cleaned Water Applications


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.

Features & Benefits

  • LED light sources for stable long life
  • Multiple fluorescence excitation and emission wavelengths
    available simultaneously to define oil types
  • Light Scatter available with or without fluorescence for
    non-petroleum oils and turbidity
  • Cuvet available for manual sample insertion testing
  • Scale/Algae Inhibitor module available for untreated waters
  • Easy calibration with menu-driven 4-line display
  • Sensor block can be remote from controller to 1,200 meters
  • Compressed air inlet for high condensation applications

Technical Specifications

Control Unit

  • Range 1-250 ppm or mg/l
  • Accuracy +/- 1% of calibrated range
  • Resolution 0.15 ppm or mg/l
  • Sensitivity 463 ppb crude reference 145 ppb diesel reference
  • Process Temp. 0-55 C (32-130 F)
  • Process Pressure 100 psig (690 kPa) maximum
  • Process Flow 0.1 l/m to 10 l/m
  • Power Input 24vdc or 80-240vac
  • Power Input 24vdc or 80-240vac
  • Enclosures Type 4/IP65 coated steel or 316SS
  • Ambient Temp. 5-55 C (40-130 F)
  • Certified to Electrical Safety Standards UL/ANSI, CSA, and IEC Standard 61010-1


The performance is based on the site calibration to a known hydrocarbon concentration in stable background water. Changes in hydrocarbon make-up and background stability may affect the output. Through a simple calibration, this unit correlates well with laboratory ISO and EPA methods.