Sensors used in medicine are mostly electronic, which are not suitable for many medical procedures, especially in hyperthermia treatments with high microwave (radiation) frequencies, ultrasonic fields or laser radiation. Because the metal conductors in electronic sensors are easily disturbed by electromagnetic fields such as current and voltage , they can cause thermal effects around the sensing head or tumor, which can lead to erroneous readings. In recent years, the use of high-frequency current, microwave radiation and laser for thermal therapy instead of surgery has attracted more and more attention from the medical community, and the small size of the sensor is very important in medical applications because of the impact of small size on human tissue. Less harmful, fiber optic temperature sensors are the smallest temperature sensors that can be made so far. It can measure the temperature and precise local information inside human tissues in a minimally invasive way. So far, fiber Bragg grating sensing systems have successfully detected the temperature of diseased tissue, which provides useful information for studying diseased tissue.

Fiber optic temperature sensors can also be used to measure the efficiency of the heart. In this method, the doctor inserts a thermodilution catheter embedded with a fiber grating into the right atrium of the patient's heart to measure the temperature of the pulmonary artery blood. Combined with the pulse power , the heart's blood output can be known, which is very important for heart monitoring.
The FISO brand FOT-M, represented by Shenzhen Xinshilian Technology Co., Ltd., is a fiber optic temperature sensor specially designed for medical applications . It combines all the excellent features you would expect from an ideal sensor body. Its compact structure, immunity to microwave and radio frequency interference, corrosion resistance, high accuracy and reliability make FOT-M the best product choice for measuring temperature in extreme environments.

The main features of the FISO FOT-M fiber optic temperature sensor are that it is completely immune to EMI and RFI, has built-in safety equipment for medical applications, and has high accuracy. For demanding applications in the medical industry such as MRI applications, the FOT-M temperature sensor can provide higher fidelity temperature measurements.
Because the FOT-M temperature sensor is designed to measure temperature under any EMI, humidity, and vibration conditions, the system is able to reliably measure temperature even in the most adverse environments. For the above-mentioned extreme environments, manufacturers can provide various types of lead cables. Based on fiber optic technology, the sensor is inherently immune to EMI and RFI. A fiber optic sensor is electronically inactive, so it does not emit or be affected by any type of EM radiation, whether microwave, RF or NMR. FOT-M fiber optic temperature sensor is based on the recognized Fabry-Perot, the specific parameters are as follows: