Temperature sensors are vital to a variety of everyday products
The most commonly measured physical parameter is temperature whether in process industry applications or in laboratory settings. Exact measurements are critical part of success. Exact measurements are needed for many applications such as medical applications, materials research in labs, studies of electronic or electrical components, biological research, and geological studies. Most commonly, temperature sensors are used to measure temperature in circuits which control a variety of equipment’s.
Fiber Optics Temperature Sensors
what's the role of fiber optics in the substation substations contain critical assets for transforming switching and distributing power across the grid. These
assets are monitored and controlled and protected by a complex collection of devices to ensure safe and efficient operation of the grid. The products used in
these applications have to be able to withstand harsh substation environment you've got temperature extremes high levels of electromagnetic interference power
fluctuations and in some cases vibration with the introduction of microprocessor based devices for monitoring control and protection.
There is a need for high speed low latency communications in the substation to exchange large amounts of critical data hardwired communication links are susceptible to electrical noise
and distance limitations of up to about 150 meters fiber optic communications are inherently immune to electromagnetic interference and provide electrical
isolation between the connected devices which drastically reduces the risk to personnel and to the individual equipment. the lightweight ruggedness and
flexibility of fiber allows it to be easily installed in the substation. The cost to install and terminate fiber is comparable to that of copper wire for these
reasons fiber is the preferred choice for communications within the substation fiber optics is ideal for asset condition monitoring when a transformer is built
qualatrol has a line of fiber optic transformer temperature probes that can be embedded in the transformer windings and mounted in other locations under oil in
the transformer tank and as part of the transformer manufacturing process.
We've got more than 150 000 temperature probes currently in use worldwide the mean time
between failure for these devices is about a hundred thousand hours under continuous mechanical vibration and temperature cycling there's no drift in the
temperature measurement with these devices so there's no recalibration required. The temperature probe communicates with qualatrol transformer temperature
monitoring equipment using optical fiber as well and the fiber optic family includes the nomad touch which is a single channel handheld unit useful for
diagnostics and some basic experiments you've got the t-guard 405 and 408 which are designed to be used in transformer control panels and then the omniflex 2
which is a multi-channel device usually used in the lab can also run labview scripts and things like that these devices can all communicate via modbus some also
with dnp3 and iec 61850 so you can integrate those with substation scada and asset monitoring systems the qualatrol 509 direct winding and the qualatrol
transformer monitoring system are multi-channel recorders that include advanced calculations for integrated comparisons of simulated winding to direct winding
hot spot measurements and for estimating the remaining insulation life in transformers the qualatrol transformer monitoring system and the tgard 408 also have
embedded web servers qualatrol's q-link software provides longer-term logging storage and reporting of transformer temperatures.
Need for Temperature Sensors
Temperature sensors are vital to a variety of everyday products. For example, household ovens, refrigerators, and thermostats all rely on temperature maintenance and control in order to function properly. Temperature control also has applications in chemical engineering. Examples of this include maintaining the temperature of a chemical reactor at the ideal set-point, monitoring the temperature of a possible runaway reaction to ensure the safety of employees, and maintaining the temperature of streams released to the environment to minimize harmful environmental impact.