Non Contact Liquid Level Sensor

Precise Measurement: NiuBoL Non-Contact Millimeter Wave Radar Liquid Level Sensor In-Depth Analysis

In modern industrial fluid management and natural water resource monitoring, achieving “measurement from a distance” while maintaining millimeter-level accuracy has always been an engineering pursuit. Traditional contact sensors (such as submersible pressure sensors and float level gauges) often face pain points like short lifespan, high maintenance frequency, and measurement drift when dealing with corrosive liquids, viscous media, or environments prone to crystallization.

As an innovator in the field of environmental sensing, NiuBoL has launched the Non contact liquid level sensor series—radar level gauges based on millimeter wave technology. This completely breaks the limitations of contact measurement, providing global users with a highly reliable, zero-maintenance liquid level monitoring solution.

Why Choose Non-Contact Measurement? Core Advantages Analysis

The greatest appeal of non-contact measurement lies in its “non-interference” principle. The sensor maintains a physical distance from the measured medium, bringing significant engineering benefits:

1. Immune to Corrosion and Contamination
In chemical acid/alkali tanks or sewage treatment pools, the medium is highly corrosive. NiuBoL non-contact sensors do not need to be immersed in the liquid, avoiding chemical erosion and greatly extending equipment service life.

2. Completely Solves Hanging Material and Crystallization Issues
For viscous liquids (such as glue, crude oil) or liquids prone to crystallization (such as salt solutions), contact probes are prone to failure due to material adhesion. Non-contact measurement eliminates such errors at the source, ensuring long-term data stability.

3. Extremely Low Maintenance Costs
Since there is no direct contact with the medium, the sensor has no risk of wear, scaling, or clogging. After installation, almost no manual cleaning or calibration is required later, especially suitable for deployment in remote reservoirs, deep wells, and other hard-to-maintain areas.

4. Ensures Medium Purity
In food processing, biopharmaceutical, and other industries where any external equipment contamination of the production liquid is strictly prohibited, non-contact measurement ensures sterility and hygiene of the production process, meeting stringent food safety standards.

Core Product Focus: Millimeter Wave Radar Level Gauge

Among various non-contact technologies (ultrasonic, laser, optical), radar technology stands out due to its excellent stability in complex environments (smoke, steam, temperature variations). The 77GHz-79GHz Frequency Modulated Continuous Wave (FMCW) radar launched by NiuBoL represents the cutting-edge level in current liquid level measurement technology.

1. FMCW Frequency Modulated Continuous Wave Technology
Unlike traditional pulsed radar, NiuBoL millimeter wave radar transmits a continuously varying frequency signal and uses the frequency difference between the transmitted and reflected signals to calculate distance. This technology provides higher signal-to-noise ratio and smaller measurement blind zone.

2. Ultra-Wide Bandwidth and Millimeter-Level Accuracy
Thanks to the high operating frequency and wide bandwidth of 77GHz, the sensor can capture extremely small level changes. Its resolution reaches 1mm, and measurement accuracy remains stable at ±1mm under typical conditions, accurately reproducing even subtle water level fluctuations.

3. Excellent Beam Focusing Capability
The product's beam angle is only 8°. A narrow beam means more focused radar signals, effectively avoiding interference from steps, brackets, pump bodies, etc., in the installation environment. This allows efficient operation even in narrow pipes or small storage tanks, with extremely flexible installation layout.

4. CMOS Millimeter Wave RF Chip Architecture
NiuBoL adopts self-developed CMOS millimeter wave chips, highly integrating RF circuits and signal processing modules. This not only reduces instrument size (integrated lens design) but also further compresses the measurement blind zone to within 15cm through algorithm optimization.

Non Contact Liquid Level Sensor Main Technical Specifications

Non Contact Liquid Level Sensor Wide Range of Application Scenarios: From Natural Hydrology to Smart Factories

NiuBoL non-contact radar level gauges, with their 65-meter ultra-long range and all-weather operation characteristics, are widely used in the following fields:

1. Hydrological and Rainfall Monitoring and Disaster Prevention & Mitigation
Deployed on bridges and riverbank sides for real-time monitoring of water level changes. Unaffected by air temperature/humidity, smoke, rain, and snow, it is the preferred data source for urban flood control and mountain flood warning systems.

2. Chemical and Industrial Storage Tank Monitoring
Monitoring corrosive liquid levels in petroleum and chemical production tanks. With RS485 bus, multiple tank level data can be transmitted in real time to the control center (DCS system).

3. Sewage Treatment and Pumping Stations
Monitoring grid wells and sump levels. Radar waves can penetrate scum and steam on sewage surfaces, providing more stable data feedback than ultrasonic waves and avoiding pump misoperation.

4. Agricultural Irrigation and Smart Water Conservancy
Combined with NiuBoL monitoring poles, achieving automated water level statistics in farmland irrigation canals and small reservoirs, assisting refined water resource management.

Common Questions about Non-Contact Liquid Level Sensors (FAQ)

Q1: What specific advantages does radar level gauge have over ultrasonic level gauge?
A: Ultrasonic waves are mechanical waves, greatly affected by air density (temperature, pressure changes) and easily absorbed by foam. Radar waves are electromagnetic waves, propagating stably in vacuum or gas environments, unaffected by fog, dust, or temperature fluctuations, with significantly higher accuracy and stability.

Q2: What should be noted about the 15cm blind zone in actual installation?
A: The blind zone is the area below the sensor antenna where accurate measurement is not possible. When installing NiuBoL radar, ensure the vertical distance from the highest liquid level to the antenna bottom is greater than 15cm. It is usually recommended to add support arms or brackets to raise the installation height.

Q3: How does the 8° beam angle help the installation environment?
A: A narrower beam angle means more concentrated energy. If your measurement environment has many interference objects (such as ladders on tank walls, agitators), the 8° beam can pass through gaps and only receive liquid surface reflection signals, greatly reducing false alarm rates.

Q4: How does the device interface with existing PLC or acquisition devices?
A: NiuBoL radar level gauge comes standard with RS485 interface, supporting standard Modbus RTU protocol. You can easily read distance, level, and other data from registers via PLC, RTU, or gateway for seamless integration.

Q5: How is the penetration capability of 77GHz radar? Can it penetrate foam?
A: 77GHz radar has certain penetration capability, but its main advantage lies in high sensitivity reflection to liquid surfaces. For thin foam, radar waves can penetrate and monitor the underlying liquid surface; if the foam is extremely thick and dense, contact technical personnel for specific condition selection evaluation.

Q6: How to ensure long-term stability of the sensor outdoors?
A: The product adopts IP67 industrial protection design, with integrated lens resistant to wind and rain. At the same time, the CMOS-based RF architecture has extremely low thermal drift characteristics, maintaining stable performance even in extreme temperatures from -40℃ to +80℃.

Summary

NiuBoL always believes that excellent sensors should be “invisible”—silently guarding production lines or river channels, providing precise data without requiring frequent human attention. Our Non contact liquid level sensor radar level gauge embodies this philosophy.

Through the application of 77GHz millimeter wave technology, we maximize the advantages of non-contact measurement: millimeter-level accuracy, 65-meter long range, extremely low power consumption, and resilience in complex environments. Whether in the digital construction of smart cities or the automation upgrade of traditional industries, NiuBoL will be your most professional and reliable partner. Please contact us, and we will provide customized non-contact level monitoring solutions for you.