Accurate liquid level monitoring in demanding industrial environments requires robust components that withstand harsh conditions without signal degradation. The HollySys AL2300 Magnetic Level Indicator 4 20mA Transmitter serves as a critical frontline element for continuous measurement and remote transmission of liquid levels. Backed by reliable regional stock support, this robust instrument ensures uninterrupted operational visibility across complex process workflows.
Deploying accurate instrumentation in heavy industrial liquid processing often presents significant engineering challenges. Vessel turbulence, high temperature fluctuations, and corrosive chemical exposure frequently disrupt conventional measurement electronics, causing unexpected process downtime or faulty telemetry signals. The HollySys AL2300 Magnetic Level Indicator 4 20mA Transmitter directly resolves these challenges by combining a mechanically durable magnetic float system with reliable electronic signal conditioning. As the magnetic float moves synchronously along the guide tube with the liquid surface, it sequentially activates internal reed switches connected to a precision resistor chain. The integrated current converter transforms this linear resistance change into a stable two-wire 4 to 20 mA DC output signal. Operating primarily within the field instrumentation layer of industrial control hierarchies, it feeds precise analog telemetry directly to distributed control systems or programmable logic controllers over long transmission distances.
Technical Specifications
Measuring Range: 0 ~ 6,000 mm
Accuracy: ±10 mm
Output Signal: Two-wire 4 ~ 20 mA DC @ 24 VDC Loop Power
Operating Temperature: -15 °C ~ 120 °C @ Process Conditions
Wetted Materials: 304 Stainless Steel, 316L Stainless Steel, PTFE, PP @ Chemical Compatibility
Ingress Protection: IP65 @ IEC 60529
Explosion Protection: Intrinsic Safety Ex ia IIC T4 ~ T6 Ga @ Hazardous Areas
Flameproof Certification: Explosion-Proof Ex d IIC T4 ~ T6 Gb @ Hazardous Areas
Dust Ignition Protection: Ex tD A21 IP65 T85 °C @ Combustible Dust Environments
Typical Applications
Process industry fluid storage monitoring requires continuous and reliable liquid level tracking to maintain safe operational inventories. This transmitter provides stable continuous output data for chemical storage tanks containing corrosive or volatile media.
Petrochemical refining setups demand rugged instrumentation capable of withstanding explosive atmospheres and aggressive hydrocarbons. The dual-certified explosion-proof construction ensures safe integration into hazardous zone distillation columns and separator vessels.
Water and wastewater treatment facilities utilize these rugged level indicators for effluent balancing and chemical dosing tanks. The stable IP65 enclosure prevents moisture ingress during intense washdown procedures and outdoor weather exposure.
Pharmaceutical manufacturing utility systems rely on precise liquid level tracking to manage pure water reserves and cleaning-fluid reservoirs. The wetted material flexibility allows safe deployment alongside sanitary or chemically aggressive process liquids.
Power generation plant auxiliary systems require dependable fuel oil and condensate storage tracking. The robust mechanical float mechanism maintains tracking reliability despite continuous vibration and thermal cycling.
Key Features
Magnetic Float Coupling - The magnetic float tracks fluid movement synchronously along the guide tube without direct fluid contact. This guarantees mechanical reliability and eliminates sealing failure points common in traditional sight glasses.
Two-Wire Current Output - The internal converter translates linear resistance changes into a standard 4 to 20 mA DC signal. This standard loop configuration enables long-distance signal transmission with high immunity to electrical noise.
Wetted Material Adaptability - Construction options including 304, 316L, PTFE, and PP accommodate diverse chemical compatibilities. Users gain application flexibility across acidic, alkaline, and neutral process media.
Explosion-Proof Certification - Compliance with intrinsic safety and flameproof standards allows safe deployment in hazardous locations. This ensures compliance with strict plant safety mandates without sacrificing measurement performance.
Rugged Ingress Protection - The IP65 rated enclosure safeguards internal electronics against dust accumulation and water jets. Facilities benefit from extended operational lifespans in demanding outdoor or washdown environments.
The comprehensive feature set of the HollySys AL2300 series bridges the gap between mechanical durability and electrical precision. By combining reliable magnetic coupling with industrial-grade electronic conversion, this instrument handles rigorous liquid measurement demands across process plants, chemical industries, and energy facilities with consistent dependability.
System Integration and Hardware Setup
Proper hardware setup begins with secure mechanical mounting of the magnetic level indicator housing to the process vessel using appropriate flange or threaded connections. Ensure the guide tube remains perfectly vertical to prevent mechanical binding of the magnetic float during operation. For electrical integration, utilize shielded twisted-pair cabling to connect the two-wire loop terminals to the control system input card. Ground the shield wire exclusively at the control panel end to eliminate ground loops and mitigate electromagnetic interference from nearby power cables or variable frequency drives. Verify loop resistance and supply voltage parameters prior to energizing the circuit to ensure stable 24 VDC operation across the entire transmission distance.
Reliability and Environmental Durability
Built for demanding industrial duty, the instrument features an IP65 rated enclosure that protects internal electronic modules against airborne dust and directional water jets. Thermal stability is maintained across an operating range of -15 °C to 120 °C, allowing deployment in unheated outdoor process areas or near elevated temperature vessels. The solid-state electronic conversion module minimizes mechanical wear components, resulting in an extended mean time between failures. Regular exterior cleaning of wetted components and periodic verification of electrical terminal tightness ensure long-term measurement stability and prevent premature environmental degradation.
Selection Guidance and Alternative Options
Selecting the correct liquid level transmitter requires careful evaluation of process temperature, tank height, chemical compatibility of wetted parts, and hazardous area classification. Beijing Zhongping Technology maintains a comprehensive inventory of HollySys automation components. Our local technical support engineering team is available to assist customers with cross-reference selection, model code verification, and rapid replacement sourcing to match specific plant engineering requirements.
Frequently Asked Questions (FAQ)
1. What is the current local stock availability and typical shipping lead time for this transmitter?
Beijing Zhongping Technology maintains active regional stock reserves for standard HollySys configurations, allowing same-day processing and rapid dispatch to minimize plant downtime and eliminate overseas freight waiting times.
2. What is the standard warranty coverage and RMA service procedure for this unit?
All units supplied by Beijing Zhongping Technology include a comprehensive 12-month manufacturing warranty, backed by pre-shipment quality verification and an efficient local replacement RMA workflow.
3. What is the required operating voltage and loop power configuration for the transmitter?
The unit operates on a standard two-wire 24 VDC loop power configuration, requiring a loop voltage range capable of supporting the 4 to 20 mA DC transmission signal across the connected wiring resistance.
4. Which industrial communication protocols and signal types are supported by this device?
The instrument outputs a standard analog two-wire 4 to 20 mA DC current signal proportional to the measured liquid level, designed for direct connection to standard analog input cards.
5. What environmental protection ratings and temperature thresholds apply to this model?
The assembly features an IP65 ingress protection rating and operates reliably within an ambient and process temperature range of -15 °C to 120 °C.
6. What are the mechanical installation requirements regarding alignment and mounting orientation?
The sensor guide tube must be installed in a strict vertical orientation parallel to the liquid movement axis to ensure smooth, unhindered travel of the magnetic float.
7. What routine maintenance procedures are recommended to ensure long-term measurement accuracy?
Routine maintenance involves periodic inspection of electrical terminal connections, checking shield grounding integrity, and verifying float mobility where process media characteristics cause residue buildup.
8. How should wetted materials be selected when dealing with aggressive chemical liquids?
Choose wetted material options such as 316L stainless steel, PTFE, or polypropylene based on the specific chemical concentration, corrosiveness, and temperature conditions of the monitored fluid process.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
Building 26, Liyuan Community, Chaoyang District, Beijing, China
