Magnetic Level Gauge With Remote Transmission (4-20mA Output)

Ordinary magnetic level gauges with alarm switches or reed switches only provide discrete on/off limit signals, which can only feedback high/low level status but cannot reflect real-time continuous liquid level changes in the tank. For modern process industries that need to monitor liquid level fluctuation, flow matching, and dynamic tank inventory, simple switch point signals cannot meet precise process adjustment requirements.

Our Magnetic Level Gauge with 4-20mA Remote Transmission is upgraded for full-range continuous data acquisition. Based on standard side-mounted magnetic level gauge structure, it is fitted with a magnetic follow-up transmitter that outputs standard 4-20mA analog signal linearly corresponding to the entire measuring stroke. The liquid level changes in real time from 0% to 100%, and the current signal changes synchronously from 4mA to 20mA, allowing the control room to obtain accurate, proportional level height data at all times.

Different from switch-type level gauges used for safety interlock and limit alarm, this model focuses on process monitoring, dynamic data tracking and inventory management. It retains full industrial performance of high pressure resistance, high temperature resistance and multi-alloy corrosion resistance, while realizing seamless docking with conventional industrial analog acquisition modules. Compared with digital bus output instruments, the 4-20mA analog version features stronger compatibility, simpler wiring, no protocol matching barriers, and wider adaptability for old and new factory automation renovation projects.

• Full-range Continuous 4-20mA Linear Output Provides 0–100% full-stroke proportional analog signal, not limited to several fixed switch points. Real-time reflection of liquid level rising and falling changes, supporting precise process regulation and tank inventory statistics.
• Dual Monitoring Mode: On-site Display + Remote Centralized Control Bi-color magnetic flap ensures intuitive local visual reading for on-site inspection; 4-20mA signal uploads real-time data to control room DCS/PLC, realizing unattended tank area management.
• Ultra-high Adaptability for Harsh Industrial Conditions Optional 304SS, 316L, Titanium, Hastelloy C276, Inconel 625 and 310S wetted materials, stably adapting to high temperature, high pressure, vacuum and strong corrosive industrial media.
• Dual Temperature-resistant Indicator Design Nylon-aluminum flappers suit medium and low-temperature processes up to 150℃; all-metal magnetic flappers support extreme high-temperature working conditions up to 400℃ for thermal fluid and high-temperature reaction tanks.
• Stable Signal & Strong Anti-interference Ability Analog 4-20mA current signal features low attenuation and strong anti-electromagnetic interference, suitable for long-distance transmission in complex industrial workshop environments without data drift.
• Flexible Custom Measuring Range & Installation Single-section measuring height up to 5500mm, standard factory tube length 6000mm, super-long customized splicing available; supports flange, welding and threaded connections to match various tank nozzles.
• Universal Industrial Compatibility Standard international 4-20mA analog protocol requires no special decoder or protocol configuration, compatible with almost all industrial control systems, instrument displays and data acquisition modules.
• Expandable Multi-function Configuration Reserved installation space for passive limit switches, realizing continuous remote transmission + on-site limit alarm dual functions in one device.

This 4-20mA remote transmission magnetic level gauge inherits the full-condition industrial structural standards of standard magnetic level gauges, and is equipped with high-linear magnetic tracking transmitter modules for continuous analog signal output. All wetted parts and pressure-resistant structures are customized for industrial harsh working conditions, with detailed parameters shown below:

This 4-20mA remote transmission magnetic level gauge is specially designed for industrial scenarios requiring real-time continuous level data monitoring and process closed-loop control, widely used in:

• Petrochemical Process Tanks Real-time monitoring of oil and solvent tank liquid level, providing continuous data for flow balance calculation and automatic feeding control.
• Power Plant Auxiliary System Condensate tanks, deaerators and cooling water tanks, supporting automatic water supply closed-loop adjustment through 4-20mA remote signals.
• Chemical Reaction & Batching Process Continuous level tracking of stirring tanks and batching vessels to ensure stable and consistent chemical batch production parameters.
• Water Treatment & Environmental Engineering Real-time remote monitoring of clean water tanks and buffer tanks, realizing automatic pump frequency conversion and liquid level linkage control.
• Metallurgy & Light Industry Storage Vessels Dynamic inventory monitoring of raw material storage tanks, facilitating factory material statistics and production scheduling.

Q1: What is the difference between 4-20mA remote transmission type and alarm/reed switch type magnetic level gauge?

A: Switch-type gauges only output several fixed-point on/off signals for limit protection. The 4-20mA remote transmission model outputs full-range continuous linear signals, which can monitor the whole process of liquid level fluctuation, suitable for precise process control and data recording, not just simple limit alarm.

Q2: What is the difference between 4-20mA analog output and Modbus/Profibus digital output?

A: 4-20mA is a universal analog signal with strongest compatibility, plug-and-play, suitable for most conventional DCS/PLC systems. Digital bus protocols are used for multi-parameter data transmission and intelligent networking. The analog version is more cost-effective and stable for single liquid level monitoring demands.

Q3: Can the transmitter work normally under 400℃ high temperature working conditions?

A: The gauge body and float can withstand up to 400℃. Since the transmitter electronic components are limited to 120℃ ambient temperature, we equip professional heat insulation and heat dissipation structures for media above 120℃ to ensure long-term stable operation of the transmitter.

Q4: Is the 4-20mA signal linear and accurate?

A: Adopts magnetic follow-up full-stroke linear induction, with strictly proportional correspondence between liquid level height and current output, no dead zone, ensuring accurate remote data feedback.

Q5: Can this device realize both remote transmission and high/low level alarm? A: Yes. It can be equipped with additional passive magnetic switches while retaining the 4-20mA remote transmission function, realizing real-time remote data monitoring + on-site limit safety double protection.

If you need real-time liquid level dynamic tracking, remote data upload and automatic process adjustment instead of only high and low limit alarm, our 4-20mA remote transmission magnetic level gauge is the ideal solution. It combines visual inspection and industrial remote control, with multiple corrosion-resistant alloy materials and high/low temperature configurations available.

Send your medium temperature, pressure, measuring range and control system requirements, and we will provide a fully customized level measurement and remote transmission solution with factory competitive price.

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