Honeywell SLG720 Intelligent Electromagnetic Flowmeter

Description

Honeywell SLG720 Intelligent Electromagnetic Flowmeter

Product Dimensions：

The Honeywell SLG720 is a high-performance Guided Wave Radar (GWR) Level Transmitter part of the SmartLine Level family. It is designed to measure the level of liquids and interfaces in demanding industrial applications, offering exceptional accuracy even in environments with high pressure, temperature, or vapor.

Product Detailed Description

The SLG720 utilizes Time Domain Reflectometry (TDR) technology. It sends low-power electromagnetic pulses along a probe (rod or cable). When these pulses hit the surface of the process medium, they are reflected back to the electronics. By measuring the “time of flight,” the device calculates the precise distance to the material level.

Unlike non-contact radar, the guided wave design ensures the signal remains focused, making it ideal for narrow tanks or media with low dielectric constants.

Technical Parameters

Product Advantages

• Immunity to Process Conditions: Since the signal is guided, it is unaffected by foam, steam, dust, or changes in vapor space density/pressure.
• Dual-Level Measurement: Capable of measuring both the total level and the interface level (e.g., the boundary between oil and water) simultaneously.
• Modular Design: Shares common components with other SmartLine transmitters, reducing spare parts inventory and simplifying maintenance.
• Advanced Display: Features a large graphic LCD capable of showing bar graphs, trend charts, and diagnostic messages in multiple languages.
• Rich Diagnostics: Includes built-in self-health checks and “Verification” features that allow users to validate the transmitter’s performance without removing it from the process.

Important Considerations & Precautions

• Probe Selection: Ensure the probe material (316SS, Hastelloy, etc.) is chemically compatible with the process fluid. Choose a rigid rod for short ranges/agitated tanks and a flexible cable for tall silos.
• Obstructions: The probe must not touch the tank wall or internal structures (ladders, agitators). Maintain the manufacturer-specified “keep-out” zone to avoid false reflections.
• Nozzle Geometry: The height and diameter of the mounting nozzle can create “dead zones” at the top of the tank. Ensure the nozzle dimensions follow Honeywell’s installation guidelines.
• Dielectric Constant: If the medium has a very low dielectric constant (E_r < 2.0), special configuration or a coaxial probe may be required for a reliable signal return.

Product Applications

The SLG720 is a “workhorse” across several industries:

• Oil & Gas: Separation tanks (oil/water interface), storage tanks, and high-pressure boilers.
• Chemical & Petrochemical: Measuring corrosive liquids in reactors or storage vessels where agitation or vapor is present.
• Power Generation: High-temperature feedwater heaters and steam drum level monitoring.
• Pharmaceutical/Food: Clean-in-place (CIP) environments where rapid temperature changes occur.

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