Get Quote
R501 R501

Fiber Optic Sensors Vs. Thermocouples in EMobility Testing

posted by Rugged Monitoring on 2020-02-17

Fiber Optic Sensors Vs. Thermocouples in EMobility Testing

For decades, Electromobility has continued to gain global recognition for its disruptive innovations of Electric powered Vehicles (EV). An electric vehicle is key to reducing harmful global emissions from vehicles powered by diesel and petrol. 

Electric vehicles depend on storage batteries for a power source: the average lifespan of a storage battery is 10 years. To replace a damaged battery is expensive, and the duration it lasts depends on temperature.

Most innovations have their challenges; electric vehicles need optimization of temperature measurement equipment for high-voltage environments to sustain battery lifespan and personal safety. 

Engineering experts have continued to build on the performance and sustainability of electric vehicles. Component testing and measurement of temperature with equipment are being used to decide the durability of electric vehicles. Temperature control is sacrosanct to electric vehicle’s design, development, testing, and performance high electrical voltage. 

One of the equipments used to measure temperature in electric vehicles is Thermocouple- A conventional temperature measurement equipment used for high electrical voltage. It isolates insulated cables, sensors, and electronics. Electric vehicles have used it for decades, but it has obvious flaws.

There are five major problems with Thermocouples. 

  • Inaccuracy in Thermocouples due to its metallurgical properties. Measurement will only be based on the reference junction temperature, i.e. within 1°C to 2°C.
  • Fluctuation in signal quality caused byelectrostatic discharges, high electrical potentials, and electromagnetic disturbances, prevailance in inverters can sway the signal quality of thermocouples. 
  • Signal conditioning becomes problematic to the transformation of voltage into a working temperature reading. Signal conditioning requires a larger investment in the design phase to disallow blunders that lower accuracy. 
  • The possibility of corrosion is a problem because of the two dissimilar metals of the thermocouple and the environment we expose them to. This may allow corrosion to take place and result in decline accuracy. 
  • Measuring microvolt-level signal changes, and this may lead to noise vulnerability. Furthermore, any twisting with the thermocouple wire pair can reduce a magnetic field pickup. 

The solution to all the challenges of Thermocouples is a Fiber Optic Temperature Sensor designed to salvage the challenges faced by conventional temperature testing and measuring equipment in electric vehicles. Fiber Optic Temperature Sensors possess immunity to withstand electromagnetic field with higher accuracy levels, portability, high responsiveness, and safety cautions. 

Some of the benefits of Fiber Optic Temperature Sensor are:

  • They possess a unique and robust design with an ultra-small footprint for tiny test objects and locations. 
  • No need for difficult calibrations because they are easy to use. 
  • There is a higher dielectric power which makes them safe to work under high voltage environments with minimal thermal shunting. 
  • With a swift response time of 0.1s to 1 ms, Fiber Optic Temperature sensors support speedy detection of temperature changes within cells.  
  • Fiber Optic Temperature Sensors give Electric Vehicles accurate testing of their cooling system. 
  • They are the best temperature measurement and testing equipment in the market with enhanced features-battery bank and cells,power train and electric motors,charging port, power electronics, high voltage cables, and large current terminals.


The Rugged Monitoring team believes E-mobility, combined with its Fiber Optic Temperature sensors for High Voltage is significant to sustainable mobility. Durable, efficient, and cost-effective storage battery managed by Fiber Optic Temperature sensors will be critical to the Automobile industry commercial success of electric vehicles.

Click here to know more about Fiber Optic Temperature Monitors

Click here to know more about Fiber Optic Temperature Sensors