MS1220-S - Oil in Water Monitor

Hydrocarbons, VOCs, fuels and oils

Detects up to 200 mg/l: ideal for refineries, petrochemical and industrial processes

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MS1220-S Oil in Water Analyser

The MS1220-S is a high concentration oil in water monitor designed to monitor water in industrial and petrochemical processes. The presence of pollutants such as BTEX, trichloroethylene (TCE), tetrachloroethylene (PCE or Perc), vinyl chloride, 1,2-dichloroethane, 1,1,1-Trichloroethane, 1,1-dichloroethylene, styrene can lead to heavy fines and process contamination. The instrument works by sensing gases or volatiles to provide a non-contact measurement system with very low maintenance requirements.

Applications

  • Oil detection in Cooling Water
  • Oil detection in produced water
  • Detection of phenols in discharge water
  • Effluent monitoring
  • Pre-filtration monitoring
  • Oil in wastewater
  • Filter protection

Features and benefits

  • No sensor contact with water: low maintenance, no sensor cleaning
  • Measures both Polycyclic Aromatic Hydrocarbons (PAHs) and VOCs
  • Electronic Nose: not affected by turbidity
  • Can be calibrated for specific substances: used to monitor known spills
  • Catches fluorescent and non-fluorescent compounds
  • Alarms to SCADA and other communication interfaces

For more information on the principle of operation, click on the FAQs tab.

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The MS1220-S oil in water analyser is designed to detect concentrations of up to 200 mg/l and is used in a variety of applications such as:

Oil in cooling water

Hydrocarbons are an ever-present class of compounds in industrial processes, factories and industrial plants of all types. A leaking piece of equipment, a corroded heat exchanger, a leaking diesel pump or an accidental spill can contaminate cooling water. The MS1220-S analyser detects contamination early, before major issues occur.

Phenols

Phenols are widely used in industry as a starting material for plastics, explosives and pharmaceuticals. However, they are potentially harmful to the environment, and companies must comply with strict emission limits.

Influent water

Wherever water and hydrocarbons mix in a process (refineries, petrochemical processes etc.), treatment is necessary before the water is reused or discharged. This influent water often has high levels of hydrocarbons, and treatment can be optimised according to the incoming concentration.

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PARAMETER OPERATIONAL REQUIREMENTS NOTES
Minimum Maximum
Detection Range 1 ppm 200 ppm Total VOCs
Display Range (Default) 0 ppm 200 ppm Configurable on commissioning
Repeatability -2% +2% +/-15% from 20 to 100 ppm, measured with a 50 ppm toluene solution at standard temperature and pressure; accuracy can be further improved at concentrations of interest using bespoke calibration on request.
Accuracy -10% +10%
Measurement Frequency Continuous
Ambient Temperature 0 °C / 32 °F 50 °C / 122 °F Climate control may be needed depending on process and ambient conditions
Water Temperature 1 °C / 34 °F 50 °C / 122 °F
Analog Input 4 mA 20 mA Scalable to range required, max load 750 Ω, loop powered or instrument powered
Analog Output 4 mA 20 mA
Analog Output Isolation 5 kVAC, 400 VDC
Relay Current 5 A Max. 250 VAC or 30 VDC; 3x: Alarm 1, 2 and Fault Relays with NO and NC contacts
Interface Touchscreen With advanced reporting capabilities
Communication Protocols Modbus (Optional) Profibus / HART / Foundation Fieldbus on request
Data Storage μSD Card / Windows PC 6 months
Instrument Case IP65 Powder coated stainless steel
System Weight 30 kg / 66 lbs
Sampling Tank 316 Stainless Steel
Flow Limit Switch Option available on request
Water Flow Rate 2 l/min / 0.52 US gpm
System Dimensions 650 x 960 x 400 mm
25.59 x 37.80 x 15.75 inches
Supply Voltage 90 V AC / 9 VDC 240 V AC / 36 VDC 50 Hz or 60 Hz
Power Consumption 45 W Typical 20 W during operation
Consumables 6 Months: Filter and restrictor

Service: Service is necessary every 6 months to maintain optimal instrument operation. Air pump replaced every 18-36 months as required. Service should be carried out by a trained technician who has completed the standard Multisensor Systems training programme.

View Datasheet

Title Type Format
MS1220-S - Oil in Water Analyser Datasheet PDF
What does the MS1220-S measure?
It measures the concentration of VOCs in water, referenced against a target gas standard (usually toluene). Other compounds can also be targeted.
How often does the instrument provide a reading?
The instrument provides continuous readings via the 4-20 mA output.
What is the reported value?
The reported value is Total VOCs in effluent water, in ppm, in the range 1-200 ppm.
What is the principle of operation?
The system samples the air above the effluent/sewage continuously; this air passes through the sensor which reacts with VOCs and measures their concentration, then reports via the analogue output.
How is the analyser calibrated?
The instrument is factory calibrated against toluene.
What are common target gases?
Petroleum Gas, Methane, Iso Butane, Kerosene, Ethanol, Diesel, Iso-butylene, Toluene, Acetone, Xylene, Heptane, Benzene, Phenols, Methanol Mercaptan
What is the required maintenance? Is it expensive?
The instrument requires service every 6 months to replace low-cost components such as activated carbon filters and ensure there are no air leaks.
What is the warranty?
Every instrument comes with a 1-year warranty from the shipment date.
How does the analyser alert the user to high concentrations of gas?
It incorporates relays which switch at user-definable thresholds. These can be hardwired to valves, pumps, or connected to SCADA systems for rapid process control or shutdown.

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