Ultra-low temperature FBG temperature sensor - Single point/multi-point FBG thermometer - FBG temperature sensor for liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium

Ultra-low temperature fiber Bragg grating temperature sensor product overview:

Beijing Dacheng Yongsheng Technology Co., Ltd.'s definition of ultra-low temperature:
"Ultra-low temperature" in this document usually refers to a temperature range below tens of degrees below zero, even as low as liquid helium (about 4.2 K or -269 °C) or liquid nitrogen (about 77 K or -196 °C). OFSCN® ultra-low temperature fiber Bragg grating temperature sensor is mainly used in the above temperature range.

OFSCN® ultra-low temperature fiber Bragg grating temperature sensor consists of optical fiber connectors (FC, SC, LC, ST, etc.), low-temperature resistant polymer materials, low-temperature resistant optical fibers, and low-temperature resistant single-point/string fiber Bragg grating (FBG) packaging. It can be customized as an ultra-low temperature radiation-resistant fiber Bragg grating temperature sensor with a certain degree of insulation properties (insulation properties have not been tested).
It is a fiber Bragg grating sensor with the characteristics of low temperature resistance, high sensitivity, fast heat conduction, good accuracy, small size, light weight, waterproof and moisture-proof, corrosion-resistant, and low-voltage insulation.

By using the temperature measurement characteristics of Bragg grating (FBG), this sensor can be inserted, stuck, surface mounted, glued or buried into the structure to be measured for temperature detection and monitoring. It can be widely used in single-point or quasi-distributed temperature measurement in the fields of cryogenic fluids and gases, superconducting materials and devices, aerospace vehicles and components, scientific experimental equipment, special industries and engineering structures, etc.

Ultra-low temperature FBG temperature sensor product structure and appearance:

OFSCN® ultra-low temperature fiber Bragg grating temperature sensor can be packaged with either single-point fiber Bragg grating or multi-point fiber Bragg grating string (fiber Bragg grating array); OFSCN® ultra-low temperature fiber Bragg grating temperature sensor appearance is as follows:

OFSCN® Ultra-low Temperature FBG Temperature Sensor Overall Appearance	OFSCN® Ultra-low Temperature FBG Temperature Sensor Package

OFSCN® ultra-low temperature FBG temperature sensor's fiber Bragg grating parameters (optional radiation-resistant fiber Bragg grating):

OFSCN® Ultra-low Temperature FBG Temperature Sensor's Fiber Bragg Grating Example 01

OFSCN® Ultra-low Temperature FBG Temperature Sensor's Fiber Bragg Grating Example 02

OFSCN® Ultra-low Temperature FBG Temperature Sensor's Fiber Bragg Grating String Example

Specifications of the Fiber Connectors Used in the OFSCN® ultra-low temperature FBG temperature sensor:

Note: Fiber connectors are made of metal and are not insulated! 

OFSCN® Ultra-low Temperature FBG Temperature Sensor Fiber Connector (FC/APC Example)

Examples of OFSCN® ultra-low temperature FBG temperature sensors in application industries:

OFSCN® ultra-low temperature fiber Bragg grating temperature sensors play an important role in many low-temperature environments with strict requirements for temperature monitoring due to their unique advantages, such as anti-electromagnetic interference, small size, light weight, high precision, fast response speed, and reusability.

Examples of main application industries

1. Aerospace field

Aerospace vehicles operate in harsh environments such as extreme low temperatures and strong radiation, and require extremely high accuracy and reliability of temperature sensors. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can achieve high-precision temperature monitoring in such environments to ensure safe operation and performance optimization of aircraft. For example, monitor the equipment temperature and fuel storage temperature inside the spacecraft.

2. Oil and gas industry

In oil and gas pipelines, storage tanks, and liquefied natural gas (LNG) facilities, accurate temperature monitoring of low-temperature environments is required to ensure safe production and transportation. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can achieve long-distance, distributed, and intrinsically safe temperature monitoring, effectively preventing risks such as leakage and icing.

3. Energy field

Power industry: Substations, high-voltage cables, transformers and other power equipment may produce local low temperatures during operation. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can be used to monitor the temperature of these equipment to prevent failures.

Nuclear power: Conventional sensors are difficult to use in high-radiation environments such as nuclear reactors. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can be customized as radiation-resistant products. Due to their radiation-resistant properties, they can be used to monitor the temperature of nuclear facilities.

Renewable energy: For example, the blades and gearboxes of wind turbines also need temperature monitoring in low-temperature environments to ensure normal operation.

4. Civil engineering and structural health monitoring

Large structures such as bridges, dams, tunnels, and buildings face low-temperature challenges in winter or cold areas, which may cause problems such as material shrinkage and cracking. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can be embedded in structures to monitor their strain and temperature changes at low temperatures in real time, evaluate the health of the structure, and warn of potential risks.

5. Chemical and pharmaceutical industries

Many chemical and pharmaceutical processes need to be carried out under strict low-temperature conditions, such as low-temperature storage, freeze drying, and ultra-low-temperature reactions. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can provide precise temperature control and monitoring to ensure product quality and production safety.

6. Medical and biomedical

In the biomedical field, such as cryopreservation of biological samples, cryosurgery, cooling of medical equipment, etc., very low temperatures need to be precisely controlled. The small size and anti-electromagnetic interference characteristics of OFSCN® ultra-low temperature fiber Bragg grating temperature sensors make them ideal for these applications.

7. Scientific research and laboratories

In the fields of low-temperature physics experiments, superconducting research, materials science, etc., accurate temperature measurements at extremely low temperatures are often required. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors are widely used due to their high accuracy and stability.

8. Refrigeration and cold chain logistics

In the low-temperature storage and transportation of food, medicine, vaccines, etc., real-time monitoring of temperature is essential. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can achieve continuous and accurate temperature monitoring of cold storage, refrigerated trucks and other environments to ensure the quality of goods.

Examples of measurement objects of OFSCN® ultra-low temperature FBG temperature sensor:

Common measurement objects of OFSCN® ultra-low temperature fiber Bragg grating temperature sensor

1. Cryogenic fluids and gases

Cryogenic liquefied gases such as liquid helium, liquid nitrogen, liquid hydrogen, and liquid oxygen: These are extremely low temperature media commonly used in superconductivity, aerospace, scientific research, and other fields. Measuring their temperature is essential for safe storage, transportation, and use.

Refrigerants in cryogenic cooling systems: Used to monitor the operating temperature of various cryogenic cooling equipment in industry or scientific research.

2. Superconducting materials and devices

Superconducting magnets: In the fields of nuclear magnetic resonance (MRI), particle accelerators, and maglev trains, superconducting magnets need to work at extremely low temperatures. OFSCN® ultra-low temperature fiber Bragg grating temperature sensors can monitor the temperature of superconducting coils, prevent the occurrence of "superconducting quench", and ensure stable operation of the equipment.

High-temperature superconducting tapes: OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor their temperature changes in low temperature environments to evaluate their performance and stability.

Other superconducting electronic devices: For example, superconducting quantum bits, superconducting sensors, etc., whose operating temperature is usually at extremely low temperatures, require OFSCN® ultra-low temperature fiber Bragg grating temperature sensors for precise temperature monitoring.

3. Aerospace vehicles and components

Rocket fuel tanks: OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor the temperature of liquid fuels (such as liquid hydrogen and liquid oxygen) to ensure that they are in a stable state.

Satellite and space probe internal equipment: In the extremely low temperature environment of outer space, OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor the temperature of key electronic components, optical devices, etc. to ensure their normal operation.

Cryogenic propulsion system: OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor the temperature of components such as propellants and pumps.

4. Scientific experimental equipment

Low temperature physics experimental equipment: Such as dilution refrigerators, cryostats, various cryogenic cavities, etc., used for cutting-edge research in materials science, quantum physics, etc.

High-energy physics experimental facilities such as the Large Hadron Collider: They contain a large number of superconducting magnets and cryogenic cooling systems, which require extensive temperature monitoring.

Deep-sea exploration equipment: In the extremely low temperature and high pressure environment of the deep sea, OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor the internal temperature of the equipment.

5. Other special industrial and engineering structures

LNG (liquefied natural gas) storage tanks and pipelines: OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor low temperatures during storage and transportation.

Civil engineering structures in polar or high-cold areas: Such as bridges, dams, tunnels, etc., OFSCN® ultra-low temperature fiber Bragg grating temperature sensors monitor the strain and temperature changes of materials at low temperatures to prevent structural failure.

Low temperature storage facilities: For example, biological sample banks, vaccine cold storage, etc., have extremely strict requirements for temperature control.