Liquid Level Sensor (Hydrostatic Level Transmitter)
High-Precision Industrial Level Monitoring Device for Reliable Tank & Fluid Level Control
Product Overview
Our hydrostatic liquid level sensors adopt high-performance pressure sensing technology to convert liquid level height into standard industrial electrical signals based on the static pressure measurement principle. Designed for seamless integration with PLC, DCS control systems and display instruments, they deliver accurate, real-time level data for storage tanks, pools, pipelines and process vessels.
Featuring excellent long-term stability, robust industrial construction and strong environmental adaptability, they are widely used in water treatment, chemical processing, grain storage, municipal utilities and other industries, serving as a reliable sensing solution for continuous level monitoring and automated closed-loop control.
Core Features
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High-Accuracy Measurement with Superior Stability
Equipped with premium diffused silicon or ceramic sensing elements, paired with built-in digital temperature compensation and linear correction circuits, the sensor achieves high measurement accuracy and minimal zero drift. It maintains consistent performance during long-term continuous operation, capturing subtle level changes to support precise process control.
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Multiple Configurations for Diverse Working Conditions
Available in various mounting types including submersible type, rod type, flange type and thread type to fit different scenarios. The submersible version comes with a waterproof cable for open pools and deep wells, while the flange type is ideal for sealed pressure tanks and corrosive media, fully adapting to diverse industrial level measurement demands.
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Industrial-Grade Protection & Corrosion Resistance
All wetted parts are made of 304/316L stainless steel (PTFE lined for highly corrosive media optional), with excellent corrosion resistance and mechanical strength. The sensing probe reaches IP68 waterproof rating and the junction housing reaches IP65, enabling reliable long-term operation in sewage, outdoor, humid and harsh industrial environments.
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Standardized Output for Easy System Integration
Supports multiple standard output signals including 4-20mA analog and RS485 digital (Modbus RTU protocol), with optional HART protocol for intelligent remote configuration and calibration. It can be seamlessly integrated into various control systems and upper monitoring platforms, effectively reducing system integration difficulty and cost.
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Comprehensive Protection & Strong Anti-Interference
Built-in reverse polarity protection, over-voltage protection, over-current protection and surge protection effectively prevent device damage caused by wiring errors and abnormal grid conditions. The optimized circuit design delivers excellent electromagnetic compatibility, suppressing on-site interference from VFDs and high-power equipment to ensure distortion-free signal transmission.
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Maintenance-Free Design for Easy Deployment
With no moving mechanical parts inside, the sensor features an extra-long service life and requires no routine calibration under normal operation. Standardized process connections enable quick installation — the submersible type can be directly lowered into liquid without complex construction, greatly reducing on-site installation and maintenance workload.
Technical Specifications
- Sensing principle: Hydrostatic pressure (diffused silicon / ceramic core optional)
- Measuring range: 0~1m up to 0~200m (fully customizable)
- Measurement accuracy: ±0.2% FS (standard), ±0.5% FS (economy version)
- Output signal: 4-20mA analog, RS485 (Modbus RTU), HART optional
- Power supply: DC 24V (standard), other voltages available on request
- Protection rating: Probe IP68, junction housing IP65
- Wetted material: 304/316L stainless steel, PTFE lined (corrosion-resistant version)
- Operating medium temperature: -20℃ ~ +85℃ (high-temperature version customizable)
- Mounting type: Submersible / rod type / flange type / thread type
- Overload capacity: 1.5 times full scale
Typical Applications
- Level monitoring of water pools, sedimentation tanks and clear water tanks in municipal water supply and wastewater treatment plants
- Level measurement and control of reactors, storage tanks and process vessels in VPSA oxygen generation, chemical and pharmaceutical industries
- Level detection of raw material silos and liquid auxiliary tanks in grain depots, feed mills and flour production lines
- Water level monitoring of pumping stations, reservoirs, rivers and groundwater
- Level control of industrial circulating water systems, fire water tanks and boiler steam drums
- Liquid level measurement of storage tanks and intermediate tanks in petrochemical and oil & gas industries
All our liquid level sensors undergo strict factory calibration, pressure cycling test and full-function verification before delivery. We also provide customized solutions for special measuring ranges, explosion-proof designs, corrosion-resistant materials and mounting types to meet diversified level measurement requirements of different industrial projects, along with reliable end-to-end technical support.
