oil in water analyzer

Oil-in-Water Analyzer

The OiW-200 Oil-in-Water Analyzer is a compact UV fluorescence sensor and transducer for the purpose of measuring BTEX, PAHs, and oil in water. This sensor features a robust design allowing for it to be used in corrosive and high-pressure environments.

The sensor can be applied to various applications, including wastewater treatment, environmental monitoring, process monitoring, and more. The sensor can be directly suspended in a medium or installed in an AAI flow cell apparatus.

The transducer is a compact device with the purpose of receiving signals from the oil in water sensor. The transducer uses this information to produce and display measurement values. The transducer can also transduce these measurement values into analog current values (4-20 mA) or communicate them via RS232, RS485, or Profibus. The measurement data can be stored to an internal SD memory card on a set schedule. This device also features two relays. One of these may be used with corresponding concentration alarms, and the other relay may be used to switch on a set schedule. The entire transducer is controlled by an easy-to-use touchscreen display.

  • Easy calibration procedure
  • Adjustable measuring range
  • Insensitive to ambient light
  • High pressure resistance
  • Low power demand
  • Real-time online monitoring
  • Modbus RTU interface
  • Available in stainless steel or titanium for harsh environments
  • No need for complex pretreatment system
  • No need for consumables such as reagents

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Applications: OiW-200

  • Environmental
  • WWTP
  • Desalination Plant
  • Wastewater
  • Process measurement and control
  • Environmental monitoring

Technology: OiW-200

Measuring Principle

When light of a particular wavelength hits particles of oil, the particles will absorb some of that light and re-emit light of a different wavelength. This is known as fluorescence. The OiW-200 analyzer measures the concentration of oil in water by monitoring the level of fluorescence.

A transmitter inside the OiW-200 emits light at about 280 nm. The oil particles in the sample absorb some of this energy and then emit light in a range between 300 and 400 nm. This light is detected by the sensor and the intensity is dependent on the concentration of the oil. Each fluorescence spectrum is unique to the specific composition of the oil mixture. The OiW-200 analyzer is suitable for the measurement of refined oils, BTEX, and PAHs in water.

Oil in water analyzer naphthalene spectrum

Installation Methods

The sensor can be directly suspended in a medium or installed in an AAI flow cell apparatus.

oil in water analyzer-installation

Specifications: OiW-200

Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.

Sensor Overview
Light Source LED < 300 nm
Lifetime: 3 years
Detector 300 - 400 nm
Lens Materials Fused silica
Sapphire (optional)
Measuring Principle UV fluorescence
Measurement Interval Configurable - 1s minimum
Measuring Range (Adjustable) Typical:
0-30 ppm
0-100 ppm
0-500 ppm
Accuracy +/- 1% FS
Sensor Material Stainless steel 1.4404
Titanium (optional)
Weight 0.8 kg
Dimensions Length: 150 mm
Diameter: 38 mm
Signal Output 4-20 mA
Power Consumption (typical) 0.5 W
Voltage Requirements 10 – 32 VDC
Interface Modbus RTU
Maximum Pressure 6 bar
Temperature Range 0 – 55 °C
Area Classification General purpose
Transducer Overview
Voltage Feed 230 VAC (90-260 VAC)
Received power max: 15 W
Display LCD Touch Panel: 240 X 128 Pixels
Operational Temperature Range -10 to 45 °C
Weight 1.35 kg
Mounting 5 mm mounting hole and track for DIN-rail
Housing Polycarbonate, 235 mm X 185 mm X 119 mm
Protection code IP65
Input 1 analog input (sensor)
2 pulse inputs selectable to PNP or NPN (also statically usable), switching current 6 A
Outputs 2 current outputs, (4-20 mA), active
1 relay, 24 VDC / 0.5 A (resistive load)
1 relay, 230 VAC / 2A (resistive load) or 24 VDC / 6 A (resistive load)
Communication Interfaces RS-232, RS-485, Profibus

Resources: OiW-200

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