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Technology
OSENSA’s Optical Fluorescent Sensor Technology
Nearly all materials will fluoresce under the right conditions. Fluorescence can be very simply defined as the emission of light when a material is exposed to electromagnetic radiation. This emission may continue for a period of time after the initial excitation. The length of time that a material will emit is a product of a number of interactions that occur at the atomic level and the amount of energy that is absorbed. Both excitation and emission intensities behave exponentially with respect to time. This dual time-dependent behavior is a unique property that can be used to indicate what state the molecules of the fluorescent material are in.
APPLICATIONS OF OSENSA'S FLUORESCENT SENSOR TECHNOLOGY
Scientists have found various classes of fluorescent materials that can be doped with specific elements to make their behaviors highly dependent on certain physical properties that are of practical interest for sensing applications. OSENSA Innovations discovered that it is possible, for instance, to use the fluorescent properties of certain crystal matrices to measure temperature, pressure, humidity, oxygen, and carbon dioxide. All of these physical properties can be measured by accurately determining the exponential time constant of the unique fluorescent material. OSENSA developed a series of highly cost-effective fiber optic temperature sensors that exploit these principles. One significant advantage that OSENSA has over competing sensing technologies is that fiber optic sensors are inherently immune to electromagnetic noise and interference. There are no metal conductors that act as antennae to transmit current and voltage. This makes OSENSA’s sensors ideally suited for applications in high-voltage power transmission, microwave, and plasma environments. In addition, OSENSA’s technology permits the use of inexpensive, large-core polymer plastic optical fiber in applications below 150°C. Plastic optical fiber is extremely robust and durable, and is already widely used in the automotive, industrial and telecommunication industries.
FIBER OPTIC TEMPERATURE SENSORS
- Fiber optic temperature sensors are solutions consisting of one or more fiber optic probes attached to a temperature transmitter (also known as signal conditioner) electronic device.
- Osensa provides DIN Mounted Fiber Optic Temperature Transmitters that are roughly 22 mm wide. They are similar to the form factor for Industrial Platinum RTD temperature transmitters.
- They mount on the DIN Rail and up to 10 can be used per USB Base
- Each Temperature Transmitters has a bottom mounted RS-485 serial bus for MODBUS for daisy chained devices.
- Some of the temperature transmitters are available with 4-20 ma Analog Outputs.
- Osensa Temperature Measurement systems are similar to cost and performance of commercial Platinum RTD and Transmitter combinations but work in harsh fields, RF, Magnetic and Microwave environments.
ACCURACY AND STABILITY
The accuracy and stability of OSENSA’s fiber optic sensors surpass traditional thermocouples and can approach PRT’s (Platinum Resistance Thermometers) in calibrated applications. OSENSA offers solutions with long-term stability of ±0.025°C, as well as products with an absolute accuracy of ±0.1°C.
Schematic overview of OSENSA’s fluorescent sensor technology
TEMPERATURE SENSING
OSENSA’s temperature sensing technology is unique. After applying a specially prepared formulation of sensitive material to the fiber optic, its temperature can be read.
The optical temperature reading is more accurate than an Infrared (IR) camera reading, and at a fraction of the cost.
Advantages of OSENSA’s fiber optic temperature sensing technology are:
- Immunity to high-voltage, high RF (radio frequency) microwave, and electromagnetic fields
- Robust polymer plastic optical fiber for simple installation and ease of handling
- Standard industrial temperature transmitter with digital and analog outputs
- Calibrated temperature accuracy of ±0.1°C
- Fast response time, contact sensing
- Industry-leading system cost
- Temperature support from -200°C to +750°C
- Replaces thermocouples and RTD’s in a variety of applications
