FISO is a leading developer and manufacturer of fiber optic sensors and signal conditioners used in medical, energy, process control and R&D applications.
FISO Technologies Inc. is a leading developer and manufacturer of fiber optic sensors and signal conditioners. Committed to providing customers with innovative and reliable solutions for measuring parameters such as temperature, pressure, displacement and position, strain and load as well as refractive index, both in harsh environments and challenging applications, FISO’s targeted markets are medical, process control, energy and research laboratories.
Fiber optic sensors and probes are designed by experienced engineers and scientists who always have in mind the needs of their customers. FISO know that our customers are working in challenging environments and need products that are based on cutting-edge technologies. One of their strongest competitive advantages is our ability to respond quickly to the needs of their customers and customize their solutions when necessary.
FISO strive as strongly as our customers to offer the best products and technologies. Besides its extreme accuracy, the advantages of fiber optics are: very high precision, intrinsically safe per nature, minimally invasive (nanotechnology), and immunity to radio frequencies, electromagnetic interferences and microwave radiations.
The company was founded in 1994 and is part of Roctest. Its products are sold in more than 75 countries through a network of representatives and distributors. Since 2003, FISO Technologies Inc. meets the requirements of the ISO 9001:2015 and ISO 13485:2016 certifications. The company is assessed and certified by BSI Group, and strictly applies its quality policy day after day.
FISO’s Nortech Transformer Winding Hot Spot Temperature Monitoring System offers direct, real-time, and long-term monitoring of power transformers, which allows for smarter dynamic substation and power grid management.
FISO’s solutions will maximize any transformer’s performance by monitoring its true temperature, which reduces premature aging and allows for intelligent preventive maintenance planning. Overall, FISO’s solutions will have a positive impact in terms of return on your investment.
FISO’s proposition to support the work of utility businesses is the Nortech Transformer Winding Hot Spot Temperature Monitoring System. Using the proven fiber optic technology, the Nortech system allows for direct, real-time, and long-term monitoring of power transformers, thus providing smarter dynamic substation and power grid management.
The temperature monitor measurement principle is based on white light absorption/transmission by a GaAs (gallium arsenide) semiconductor. The impacts of temperature variations on this semiconductor are well known and predictable. As the temperature of the semiconductor changes, the semiconductor’s transmission spectrum (i.e. the light that is not absorbed) also shifts. At any given temperature, there will be a wavelength at which the transmission essentially jumps from 0% to 100%. This jump is called the absorption shift, and the relationship between the specific wavelength where the absorption shift takes place and the temperature is predictable.
The sensor consists of a tiny GaAs semiconductor crystal that is bonded to one end of a well-polished fiber optic.
The white light launched from the monitor into the fiber optic travels through to the GaAs crystal, passing through it while being partially absorbed, and is then reflected to the monitor by a mirror located at the very tip of the sensor. The light reflected to the monitor is coupled into an optical spectrum analyzer, which then measures the optical power transmission versus the wavelength. The position of the absorption shift is determined by the monitor using a proprietary signal analysis algorithm and is then correlated to the temperature of the GaAs crystal.
Furthermore, since the semiconductor will not change over time, all sensors can be interchanged with no need for calibration or entry of factors when swapping sensors. For the same reason monitors never need recalibration after leaving the factory when used under normal operating conditions.
The TPT-62 fiber-optic temperature monitor probe family employs industry-standard 62.5µm core OM1 fiber optic for highly improved optical, mechanical, and reliability properties over legacy 200 µm core (1st generation) fiber optic sensors.
The EasyDisk sensor tip assembly ensures IEC60076-2 (Annex E) compliant installation and enables quick insertion of the probes into the spacers within the windings of transformers..
The fiber optic signal conditioners are designed for direct, accurate and real-time temperature monitoring to manage and maximize your transformer’s performance.
The Nortech temperature monitor family comes in three different classes: the EasyGrid is the most comprehensive model, the EasyGrid LT is a compact and very cost-effective model for low channel count monitoring applications, and the EasyGrid Base is and even more compact model designed for easy network integration.
Learn how to install HotSpot sensors into transformers according to IEC and how FISO EasyDisk can increase long time reliability.
Presentation of FISO's EasyTest II, portable fiber optic temperature sensor reader.
Advantages of using 62.5µm over 200µm fiber optic.
Your first monitor install..