HollySys AL2000 Magnetic Level Gauge with Level Transmitter

The HollySys AL2000 Magnetic Level Gauge with Level Transmitter delivers continuous liquid level detection for pressurized industrial vessels handling hazardous or corrosive fluids. Engineered for critical process applications, it isolates the local visual indicator from the process media through magnetic coupling. This design ensures reliable operation in high-temperature or toxic environments while eliminating direct glass contact.

Fluid level monitoring in modern process plants frequently encounters challenges such as high viscosity, aggressive chemical composition, and elevated operating pressures. Traditional glass tube gauges present critical failure risks due to potential glass rupture and leakage under stress. The AL2000 addresses this operational bottleneck by employing a magnetic float that travels inside a sealed bypass chamber, securely driving an external bi-color magnetic flap indicator. This contactless mechanical linkage prevents fluid leakage and maintains clear visibility even when process fluids are opaque or hazardous. Furthermore, the integration of an optional HART level transmitter enables seamless conversion of physical liquid height into standard 4-20 mA output signals for centralized control rooms.

Technical Specifications

Measuring Range: 0 - 15000 mm

Accuracy: ± 10 mm

Structure Type: Basic, Anti-corrosion, Jacket Heating, Electric Heat Tracing, Balanced Transmission

Wetted Materials: 304/316L, PP, PVC

Communication Protocol: HART @ Optional 24 VDC

System Integration and Hardware Setup

Proper mechanical installation of the AL2000 series requires secure flange mounting to the process vessel using matching pressure classes and gasket materials to prevent leakage under thermal expansion. When integrating the optional HART level transmitter, shielded twisted-pair cables must be utilized to minimize electromagnetic interference from nearby variable frequency drives or high-voltage power lines. The signal cable shield should be properly grounded at a single point inside the control cabinet to eliminate ground loops and ensure signal integrity. Field technicians must verify correct polarity before applying power to the transmitter loop. The local magnetic column should be aligned vertically to ensure unrestricted float movement along the entire measuring chamber without mechanical binding or friction.

Reliability and Environmental Durability

Designed for rigorous industrial environments, the wetted components of the gauge are constructed from high-grade stainless steel or corrosion-resistant polymers to withstand aggressive chemical exposure. The magnetic tracking system operates reliably across wide ambient temperature variations without mechanical degradation or loss of magnetic flux density. Continuous operation in outdoor process units requires protection against driving rain, dust, and ice accumulation, which is inherently managed by the robust enclosure design of the indicator assembly. The unit achieves extended mean time between failures through its few moving parts, requiring minimal mechanical maintenance compared to complex electronic level sensors.

Selection Guidance and Alternative Options

Choosing the appropriate configuration depends heavily on specific process parameters including operating temperature, pressure ratings, and fluid density profiles. For corrosive acid storage applications, polymer-lined wetted parts or specialized anti-corrosion configurations are mandatory. When local stock availability or urgent project timelines dictate immediate delivery, Beijing Zhongping Technology provides comprehensive technical support and assists engineering teams with cross-reference model selection to match existing plant infrastructure.

Frequently Asked Questions (FAQ)

1. What is the current local inventory status and delivery lead time for standard models?

Beijing Zhongping Technology maintains a ready inventory of standard configurations to support rapid dispatch and minimize plant downtime.

2. What are the terms of the warranty and the standard RMA return process?

All units include a 12-month manufacturing warranty backed by pre-shipment quality verification, with local technical support handling any RMA requests.

3. What is the standard operating voltage and power consumption for the HART transmitter option?

The loop-powered transmitter typically operates on 24 VDC with standard current output scaling of 4-20 mA.

4. What communication protocols and shielding requirements apply to the transmitter signal wiring?

The optional transmitter supports the HART protocol superimposed on the 4-20 mA loop, requiring shielded twisted-pair cabling to prevent electromagnetic interference.

5. What are the maximum temperature and pressure limits for standard stainless steel configurations?

Operating limits depend on the specific material grade and gasket selection chosen for the application environment.

6. What mechanical mounting orientations and process connection types are available?

Units can be side-mounted or top-mounted using flanged or threaded connections matching standard piping specifications.

7. What routine maintenance procedures are recommended to ensure long-term measuring accuracy?

Routine checks involve inspecting the magnetic float movement, cleaning the external indicator column, and verifying zero and span calibration on the transmitter loop.

8. How does the magnetic coupling mechanism prevent fluid leakage under high pressure?

The process fluid remains completely contained within the sealed bypass chamber while external magnetic flags rotate in response to the internal float position, ensuring total physical isolation.