Level Gauge Manufacturer for EPC, Power Plant & Industrial Process Control

✅ Professional Level Gauge Manufacturer in China
We are a professional manufacturer of level gauges (物位计/液位计) for EPC projects, power plants, petrochemical, oil & gas, metallurgy, water treatment, and industrial process control applications. A level gauge is an instrument used to measure the height of liquid or solid material in closed vessels, open tanks, or silos. Our product portfolio includes radar level gauges, guided wave radar level gauges, magnetic flip level gauges, capacitance level gauges, ultrasonic level gauges, glass tube/plate level gauges, float level gauges, and RF admittance level switches. All products comply with JB/T 13252-2017 (Microwave/Radar Level Gauge), JB/T 9261-2015 (Capacitance Level Gauge), GB/T 25477-2010 (Anti-corrosion Magnetic Flip Level Gauge) and project-specific standards[reference:0], with 4-20mA, HART, RS485 (MODBUS), and switch output options available.

📋 Level Gauge Product Categories

📋 Technical Specification

* Custom specifications are available upon request for EPC project tenders.

📦 Key Series Models

🔹 Radar Level Gauge Series

🔹 Guided Wave Radar & Magnetic Flip Series

🔹 Capacitance, Ultrasonic & Glass Level Gauge Series

🔹 Level Switch Series

📊 Level Gauge Selection Guide

❓ Frequently Asked Questions (FAQ)

Q1: What is a level gauge?
A: A level gauge (物位计/液位计) is an instrument used to measure the height or position of liquid or solid material in a closed vessel, open tank, or silo. Level gauges are essential for inventory management, process control, and safety monitoring in industrial facilities, providing either continuous measurement or point-level switching.

Q2: What are the main types of level gauges?
A: The main types include: Radar level gauges (non-contact, microwave), Guided wave radar level gauges (TDR along probe), Magnetic flip level gauges (buoyancy + magnetic coupling), Capacitance level gauges (capacitance change), Ultrasonic level gauges (sound wave reflection), Glass tube/plate level gauges (direct visual), Float level gauges, and Level switches (RF admittance, vibrating fork, rotary paddle).[reference:42][reference:43]

Q3: What is the difference between continuous level measurement and point level measurement?
A: Continuous level measurement provides real-time level readings across the full measurement range (e.g., radar, ultrasonic, capacitance, magnetic flip) — used for inventory monitoring and process control. Point level measurement (level switches) detects whether the material has reached a specific high or low level — used for alarm and interlock control (e.g., overfill prevention, pump protection).

Q4: What standards do your level gauges comply with?
A: Our level gauges are manufactured in compliance with: JB/T 13252-2017 (Microwave/Radar Level Gauge)[reference:44], JB/T 9261-2015 (Capacitance Level Gauge)[reference:45], GB/T 25477-2010 (Anti-corrosion Magnetic Flip Level Gauge)[reference:46], and GB3836 (Explosion-proof). We also support international standards upon request.

Q5: What output signals and communication protocols are available?
A: We offer 4-20mA DC analog output, switch (SPDT) output for level switches, and digital communication protocols including HART and RS485 (MODBUS).[reference:47]

Q6: What is a radar level gauge and how does it work?
A: A radar level gauge (LDW series, SYLW5X) uses microwave pulse or FMCW technology for non-contact level measurement. It emits microwave signals from an antenna, which reflect off the material surface and return to the receiver. The time-of-flight of the signal is proportional to the distance to the material. Key advantages: No moving parts, unaffected by temperature, pressure, vapor, dust, and vacuum[reference:48]. The SYLW5X series can measure up to 70 meters[reference:49].

Q7: What is the difference between LDW80F and LDW60E radar level gauges?
A: LDW80F is designed for solid media, especially high-temperature environments (blast furnaces), with a measurement range of 15m, 6GHz frequency, and process temperature up to 400°C[reference:50]. LDW60E is a high-frequency (26GHz) radar for solid particles and powders, with a range of 20m and temperature up to 300°C[reference:51]. Choose LDW80F for extreme high-temperature solids; LDW60E for better accuracy with powders and smaller particles.

Q8: What is a guided wave radar level gauge (LDW50A)?
A: Guided wave radar (LDW50A) uses TDR (Time Domain Reflectometry) technology, where microwave pulses travel along a cable or rod probe and reflect off the material surface[reference:52]. It is ideal for liquids and solid powders in complex conditions, with measurement range up to 30m, accuracy of ±10mm, and temperature range of -40°C to 250°C[reference:53]. It works well with low dielectric constant media and can be installed in metal or non-metal containers[reference:54].

Q9: What is a magnetic flip level gauge (UHZ-50) and what are its advantages?
A: The UHZ-50 magnetic flip level gauge operates on buoyancy and magnetic coupling principles. A float with permanent magnets rises and falls with the liquid level, driving red/white flip columns to display the level visually[reference:55]. Advantages include: Local direct-reading display, no power required for indication, high sealing (no leakage), suitable for high temperature (-20°C to 500°C), high pressure (up to 10MPa), and corrosive/flammable/explosive media[reference:56][reference:57]. Optional remote transmitter and switch outputs are available.

Q10: What is the difference between side-mounted and top-mounted magnetic flip level gauges?
A: Side-mounted (UHZ-50/C series) connects to the vessel through upper and lower pipes — the measurement range is the center-to-center distance of the two connections[reference:58]. Top-mounted (UDZ series) is inserted from the top of the container — suitable for underground tanks and vessels where side mounting is not feasible[reference:59]. Top-mounted is ideal for underground storage tanks and applications where the vessel cannot be opened on the side.

Q11: What is a capacitance level gauge (UYZ3) and how does it work?
A: The UYZ3 capacitance level gauge measures level based on the capacitance change between the sensor and the measured medium. As the liquid level changes, the capacitance between the probe and the container wall changes proportionally[reference:60]. It uses the static pressure measurement principle: P = ρ·g·H + Po, converting pressure into level[reference:61]. Available in cable-type, rod-type, and anti-corrosion versions, with 4-20mA output and Exia IIC T6 explosion-proof certification[reference:62].

Q12: What is an ultrasonic level gauge and what are its applications?
A: An ultrasonic level gauge uses ultrasonic pulse reflection for non-contact measurement. The sensor emits ultrasonic pulses, which reflect off the material surface and return to the sensor[reference:63]. It features automatic power adjustment, gain control, and temperature compensation[reference:64]. Range: 0-20m, accuracy: 0.25%, with PTFE sensor for corrosion resistance[reference:65]. Applications include liquid level measurement in open channels, tanks, and solid material height in water treatment, chemical, and food industries.

Q13: What are glass tube and glass plate level gauges (UB-5/HG5) used for?
A: Glass tube/plate level gauges provide direct visual indication of liquid level through transparent glass[reference:66]. The UB-5 series features high-temperature resistant glass, simple structure, and reliable operation[reference:67]. The HG5 series includes automatic sealing ball valves that seal if the glass breaks, preventing liquid spillage[reference:68]. These are low-cost, simple, and reliable solutions for applications where continuous electronic measurement is not required.

Q14: What is an RF admittance level switch (TKWL-1900)?
A: The TKWL-1900 RF admittance level switch is a point-level control instrument based on RF admittance measurement[reference:69]. It uses three-electrode technology to measure capacitance, resistance, and inductance — making it more accurate than traditional capacitance switches[reference:70]. It is suitable for most industrial applications including limit control and alarm for liquids, solids, and slurries.

Q15: What is a vibrating fork level switch (TKWL-2100)?
A: The TKWL-2100 vibrating fork level switch uses a piezoelectric crystal to vibrate the fork at its natural frequency. When the fork is covered by material, the vibration frequency changes — this change is detected and triggers a switch output[reference:71]. It is suitable for solids (rice, milk powder, sugar, salt, cement, plastic pellets) and liquids in point-level alarm and control applications[reference:72]. Features adjustable amplitude for different material densities and states[reference:73].

Q16: What are the typical applications of level gauges in EPC projects?
A: Level gauges are used in EPC projects for: Power plants — boiler drum level, condenser hotwell, cooling water; Petrochemical — reactor level, storage tank inventory; Oil & gas — separator level, tank farm monitoring; Water treatment — basin level, chemical dosing tanks; Metallurgy — molten metal level, slag level; Mining — ore bin level, slurry tanks.

Q17: How do I select the right level gauge for my application?
A: Key selection factors include: (1) Media type — liquid, solid (powder/granule/block), or slurry; (2) Measurement type — continuous or point level; (3) Temperature and pressure — operating conditions; (4) Vessel type — open or closed, metal or non-metal; (5) Measurement range; (6) Accuracy requirement; (7) Output signal — 4-20mA, switch, HART, RS485; (8) Hazardous area classification — explosion-proof if required; (9) Media properties — corrosive, conductive, dielectric constant, sticky, etc.

Q18: What is the difference between a level gauge and a level transmitter?
A: A level gauge is the complete instrument that measures and displays level. A level transmitter is a level gauge that includes a standardized output signal (4-20mA, etc.) for remote transmission to control systems. Some level gauges (like magnetic flip types) provide local indication only; others (like radar and capacitance types) are inherently transmitters with both local display and remote output.

Q19: Do you support EPC projects with technical documentation?
A: Yes. We provide full technical support for EPC projects, including datasheets, calibration certificates, type test reports, factory acceptance tests (FAT), material traceability documentation, and custom configuration based on project instrumentation schedules and control system requirements. We are a trusted partner for global EPC contractors in power, petrochemical, oil & gas, and water treatment sectors.

Q20: Can you provide custom level gauge configurations?
A: Yes. We offer fully customized level gauge solutions including custom measurement ranges, materials (304/316L stainless steel, Hastelloy, PTFE-lined), process connections (flange/thread/clamp), output signals, communication protocols, temperature/pressure ratings, explosion-proof certifications, and special markings. Our engineering team works closely with EPC contractors to develop level gauges that meet specific project technical requirements and process conditions.

📩 Contact Us for EPC Project Pricing & Technical Support

Send your project specification, level measurement requirements, or instrumentation schedule. Our engineering team will reply with a customized solution, BOM & datasheet within 24 hours.

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WhatsApp / Zalo: +86 17856068126  |  Email: [email protected]

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