The MS1200-S is part of the next generation of Multisensor Systems' on-line Oil in Water and Pollution Analysers and is designed to protect drinking water treatment plants from pollution events from boreholes or at surface raw water intake. These events can result in expensive filter replacement and cleanup
operations and may also affect the quality of drinking water with regulated pollutants such
as BTEX, trichloroethylene, tetrachloroethylene, vinyl chloride reaching the customers.
Applications
Monitor water abstraction points such as raw river water, boreholes and reservoir water
Monitoring for oil in water contamination
Detect VOC contamination in industrial wastewater
Surface water systems for fuel pollution
Offer a monitoring solution for air, land remediation and industrial applications
Detect VOC breakthrough in carbon beds
RO membrane protection
Measurement of VOCs in process water
Fuel pollution protection for surface water systems
Features and Benefits
No sensor contact with water: low maintenance, no sensor cleaning
No reagents: low running costs
Measures both Polycyclic Aromatic Hydrocarbons (PAHs) and VOCs
Electronic Nose: not affected by turbidity
High sensitivity: ideal for potable water
Can be calibrated for specific substances: used to monitor known spills
Catches VOC chemical spills not just hydrocarbons
Alarms to Dry Relays, SCADA and other communication interfaces
For more information on the principle of operation, click on the FAQs tab.
Oils and hydrocarbons very often the main components of a wide range of products, from fuels and solvents to many of the chemicals used in industry for treatment processes.
In industrial production it is possible that some of these hydrocarbons, oils and solvents leak into drains, or worse, directly into the environment.
Similarly, domestic and agricultural fuel storage can result in accidental spills into water courses and aquifers.
This can be a real and huge problem for water supplies and, in the worst case, threaten the water security of whole communities. Often, these accidents result in large fines and expensive clean-up operations.
An Oil in Water Analyzer can make the difference, by giving an early warning when a problem arises.
+/-10% from 30 to 3000 ppb, calibrated against
NIST traceable toluene gas standards under
Standard Laboratory Conditions; accuracy can
be further improved at concentration 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 might 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 keep the instrument operating
in optimal conditions. Air Pump replaced every 18-36 months as
required. Service should be carried out by a trained technician who has
undergone the standard Multisensor Systems training course.
MS1200-S utilises a contactless measurement technique based on Henry’s Law, sensing headspace gases or volatiles in the sampling tank provided, and provides a measurement system with very low maintenance requirements.
Thanks to the clever design and technology the sensor never touches the water. This results in reduced drift, virtually no fouling, no sensor cleaning and very low maintenance.
The MS1200-S is accurate to low ppb concentrations and its wide dynamic range allows it to be used in a wide variety of environments.
The concentration of Volatile Organic Compounds and Water Vapour in the headspace increases until equilibrium is reached with the concentration in the water (Fig. 1)
A sample of gas is then taken from the headspace and the response analysed to provide a concentration in ppb of contaminants in the water (Fig. 2).
What does the MS1200-S Oil in Water Analyzer actually measure?
The MS1200-S measures a wide range of hydrocarbons including most PAHs, aromatic and aliphatic hydrocarbons. It is conceived to be a generic early warning system and, for this reason, it has been designed to respond to as many contaminants as possible. A detailed study can be found here. If you are interested in a specific compound or sets of compounds, please get in touch
What is the difference between an Oil in Water, PAHs, Hydrocarbon, VOC Analyzer?
Different people in different sectors refer to the same problem using different expressions. In the water industry the operators usually talk about “Oil in Water Analyzer” , “Pollution Event Analyzer” or “PAHs Analyzer”; in the industrial sector customers refer to “VOC Analyzer” or “Hydrocarbon Analyser”. Most of the times these expression refer to applications that can be approached using the MS1200-S.
What is the reported value?
The instrument will report the Total VOC value that the sensor detects as an equivalent of Toluene at 25 C.
Does the MS1200-S measure kerosene, diesel, gasoline and other fuels?
Yes. The instrument detects these and many other compounds. For more information on a specific compound, contact us.
How is the MS1200-S calibrated?
The instrument is factory calibrated using Toluene standards. Toluene has been chosen since it is relatively safe to use and to store and because it is representative of BTEX (benzene, toluene, ethylbenzene and xylene), a compound of interest in the water sector as well as in the industrial sector.
What is the required maintenance? Is it expensive?
The instrument requires a service every 6 months to replace some low cost components such as activated carbon filters and to make sure that there are no air leaks.
Do I need a filter before the instrument?
In most applications a filter is not needed. The sampling system (the tank) is designed to deal with river water to reduce blockages.
If you are concerned about blockages, or your water has very high levels of suspended solids, please get in touch.
What is the warranty?
Every instrument comes with 1 year warranty from the shipment date
What is the expected life of the sensor? Is it difficult to replace?
The sensors used in the Oil in Water and Hydrocarbon Analyzer are designed to last a long time. On average sensors are replaced every 5 years, however this time can change depending on the conditions of the water and the VOCs levels they are exposed to. The sensor is easy to replace
Is the instrument certified?
There is not an EPA certified method for the on-line detection of oil in water and pollution, this means that a certification is not possible. Some local institutions have suggested to certify the process and we have carried out trials verified by national institutions against GCMS analysis in strict conditions. You can find more information in this document.
How often does the MS1200-S take a measurement?
A measurement is taken every two seconds.
What are the advantages of using e-nose technology?
E-nose technology allows for non-contact measurement meaning that:
fouling of the sampling system is minimized through large diameter tubes being used
suspended solids and dissolved chemical compounds do not coat or damage the sensors or optical components as used in Ultra Violet, Infra Red or Laser spectroscopy systems, extending their lifetime and reducing cleaning requirements
no reagents are necessary as for instruments which use colorimetry as their detection technology
no purging gases are needed as for GCMS based systems
Which regions of the world use Multisensor’s products?
Multisensor’s products are used throughout the world.
Oil In Water vs Oil On Water
Oil In Water Analyzer (MS1200-S)
An “Oil In Water” analyzer , such as the MS1200-S, measures very low concentrations of hydrocarbons dissolved in the water; this is what we are usually interested to know as it provides the first indication that an oil spill or fuel spill has occurred.
The operating range of the MS1200-S Oil in Water Analyser is 0 – 3000 ppb, but most applications focus on the 0 – 200 ppb range: As the manager of a drinking water plant , you want your oil in water analyzer to give you a low level alarm at around 20 ppb and a high level alarm at 50 - 100 ppb.
This means that, in most cases our MS1200-S, is used for applications where the operator of the WTP has carried out a risk analysis and has decided to protect their water intakes from low level contamination of oil in water or where there has been known to have been a fuel spill and monitoring of the aquifer is necessary.
Moreover the MS1200-S Oil in Water Analyser will detect any hydrocarbon, both aliphatic (chains) and aromatic (rings).
This means that, compared with other technologies, it can see a wider range of hydrocarbons at very low concentrations.
Oil on Water Monitors or Analyzers are different in principle as they are designed to detect a floating film of oil or fuel on top of a body of water. By definition this means that they detect hydrocarbons at a much higher concentration than an Oil in Water Analyser.
The system usually works by using a laser positioned above the water and a detector which measures the reflected laser beam. The presence of a floating film will disperse the reflected laser beam and this loss can be measured. This technology is usually cheaper than an e-nose based system and it’s usable when the application is to measure high concentrations.
On the other hand there are some limitations:
It IS affected by disturbance of the water surface : since it’s an optical measurement, the reflected laser will be disturbed by the rough water surface
It cannot measure low concentrations
It cannot detect hydrocarbons which are readily dissolved in the water as these will not form a film
Oil on Water Detectors are usually used to detect gross leakage from oil and fuel storage sites.
