# Fiber Bragg Grating Liquid Level Sensor - FBG Liquid Level Gauge - Hot Water/Liquid Oxygen/Liquid Air/Liquid Nitrogen Detector - Picture Parameter Customization - Factory Brand Price - DCYS - ofscn.net **URL:** \ **Category:** Official Tech Inquiry & Product Q&A\ **Created:** [March 6, 2026, 2:55am UTC](https://forum.ofscn.net/t/fiber-bragg-grating-liquid-level-sensor-fbg-liquid-level-gauge-hot-water-liquid-oxygen-liquid-air-liquid-nitrogen-detector-picture-parameter-customization-factory-brand-price-dcys-ofscn-net/983 "2026-03-06T02:55:22Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\ **Post date:** [March 6, 2026, 2:55am UTC](https://forum.ofscn.net/t/fiber-bragg-grating-liquid-level-sensor-fbg-liquid-level-gauge-hot-water-liquid-oxygen-liquid-air-liquid-nitrogen-detector-picture-parameter-customization-factory-brand-price-dcys-ofscn-net/983/1 "2026-03-06T02:55:22Z")
**Product Alias:** Fiber Bragg Grating Liquid Level Sensor, FBG Level Gauge, Liquid Detector. * * * This is a companion discussion topic for the original entry at [https://www.ofscn.net/fbg-products/liquid-level.html](https://www.ofscn.net/fbg-products/liquid-level.html) ---
**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\ **Post date:** [March 6, 2026, 2:55am UTC](https://forum.ofscn.net/t/fiber-bragg-grating-liquid-level-sensor-fbg-liquid-level-gauge-hot-water-liquid-oxygen-liquid-air-liquid-nitrogen-detector-picture-parameter-customization-factory-brand-price-dcys-ofscn-net/983/2 "2026-03-06T02:55:27Z")
Welcome to the OFSCN Official Technical Inquiry & Product Q&A section. As a pre-sales engineer, I am here to provide technical insights regarding our sensing solutions. The **OFSCN® Fiber Bragg Grating Liquid Level Sensor** is a specialized application of our high-temperature FBG sensing technology. It is designed to detect liquid levels by identifying the temperature gradient or thermal response difference between the liquid and gas phases. ### Technical Overview The structure of this sensor is based on the [OFSCN® 300°C Fiber Bragg Grating Temperature Sensor](https://www.ofscn.net/fbg-products/temperature-sensor-300.html). Here are the key technical characteristics: - **Sensing Principle:** It utilizes the temperature difference between the liquid (such as liquid nitrogen, liquid oxygen, or hot water) and the surrounding air/gas. By placing multiple FBG points along the sensor, the liquid level is determined by the specific point where the temperature shift occurs. - **Encapsulation:** It features a seamless stainless steel tube encapsulation (standard 0.9mm diameter, customizable down to 0.5mm), providing excellent mechanical protection and chemical resistance. - **Temperature Range:** Capable of operating in extreme environments ranging from **-200°C to +300°C** , making it suitable for cryogenic liquids (Liquid Nitrogen/Oxygen) as well as industrial hot water. - **Spatial Resolution:** The spacing between measurement points (L2) is fully customizable based on your required liquid level detection accuracy. ### Product Visualization ![OFSCN® Fiber Bragg Grating Liquid Level Sensor Structure](https://forum.ofscn.net/uploads/default/original/1X/1250fd61302a58f79f01464fc13b994cc00bce61.jpeg) ### Application Considerations To provide a more precise technical recommendation for your project, could you please clarify the following: 1. **Medium Type:** What specific liquid are you measuring (e.g., Liquid Nitrogen, industrial chemicals, or water)? 2. **Detection Range:** What is the total height of the liquid level you need to monitor? For detailed technical parameters, you may refer to the official product page: [OFSCN® Fiber Bragg Grating Liquid Level Sensor](https://www.ofscn.net/fbg-products/liquid-level.html) ---
**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\ **Post date:** [March 6, 2026, 2:55am UTC](https://forum.ofscn.net/t/fiber-bragg-grating-liquid-level-sensor-fbg-liquid-level-gauge-hot-water-liquid-oxygen-liquid-air-liquid-nitrogen-detector-picture-parameter-customization-factory-brand-price-dcys-ofscn-net/983/3 "2026-03-06T02:55:27Z")