- Model CMS-4000 - Continuous Monitoring System


The CMS-4000 is a simple, reliable tool to measure and monitor total petroleum hydrocarbons in water. With no moving parts and corrosion protected components, the system can be utilized in many different applications.

The CMS-4000 logger with the Fiber Optic Chemical Sensor(FOCS) detects the presence of petroleum hydrocarbons in water.

The FOCS probe takes advantage of the interaction between the light traveling through a fiber and a water solution containing petroleum hydrocarbons. As the concentration of hydrocarbons increases, the light scattered from the proprietary probe fiber increases in a quantitative relationship. The probe output is monitored by a controller that has 0-5 volt or 4-20 mA output and remote access capability. The system can monitor up to four (4) probes. The probe is intrinsically safe* and designed to be remotely mounted in hazardous locations.

*When used with the FCI Environmental Intrinsic Safety Barrier.

  • Reliable tool that measures petroleum hydrocarbons in water
  • Used in applications where Web connection is NOT required
  • Used where logger needs to communicate with other equipment in the plant
  • Continuous data collection and recording
  • Certified Intrinsically Safe by UL
  • Analog (V or mA) output
  • Connect up to 4 DHP hydrocarbon probes
  • Real time remote monitoring

  • Process water
  • Waste water
  • Oil field produced water
  • Separation vessel effluent
  • Storm water run-off
  • Groundwater remediation monitoring
  • Carbon filter bed breakthrough
  • Heat exchanger leak detection


  • Operating Range: 0-2,000 ppm as TPH
  • Lower Limit of Detection: 0.1 ppm as xylene
  • Hydrocarbons Detected: C6 and higher MW petroleum hydrocarbons
  • Accuracy/Precision: ±10% of reading
  • Response Time (initial): <15 seconds
  • Response Time (to 95%): <5 minutes
  • Operating Temperature Range: 0° - 50° C
  • Trend Correlation with GC data: 98% vs. EPA Method 8020

Hardware Specifications

  • Enclosure: NEMA 4X
  • Analog Output: 0-5 Volts, 4-20 mA (optional)
  • Physical Dimensions: 12' L X 11' W X 6.5' D. (305 X 280 X 165)
  • Enclosure Wt.: 9 lbs.
  • Environmental Temperature: 0°C to +50°C
  • Sample Temperature: UL, CUL, KEMA, CE

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