Masoneilan 12400 Series Digital Level Transmitter Displacer Industrial Level Measurement

Masoneilan 12400 is a torque-tube displacer type level transmitter with integrated smart electronics and HART communication. It has been a workhorse in refineries and petrochemical plants for decades, especially for measuring level in crude columns, vacuum towers, and high-pressure separators. The torque-tube design keeps the electronics isolated from the process, making it very reliable in dirty, viscous, or corrosive services.

• Torque-tube transmission – no moving seals on process side
• Smart HART electronics with local display and push-button calibration
• Capable of level, interface, and density measurement (multi-displacer setups)
• Wide selection of displacer materials (316L, Hastelloy C, Monel)
• Broad temperature and pressure range for severe service
• Simple local zero/span adjustment
• Strong resistance to fouling and corrosion

• Measuring Range: 356 mm to 3048 mm (14" to 120")
• Process Pressure: Up to ANSI Class 2500 / PN 400
• Process Temperature: -196 °C to +400 °C
• Accuracy: ±0.5% of span (typical)
• Output: 4–20 mA + HART
• Body Materials: Carbon steel, 316L stainless steel, Hastelloy C, Monel
• Displacer Materials: 316L, Hastelloy C, Monel
• Approvals: ATEX, IECEx, FM, CSA (hazardous area certifications)

• Crude column boot level
• Vacuum tower level
• High-pressure separator interface
• Density measurement
• Severe service vessels (high temp/high pressure)

Q: Is the 12400 still in production?

A: Yes – new units and spare parts are still available.

Q: Can it replace older 12200 or 12300 models?

A: Yes – mounting dimensions and interfaces are compatible for direct replacement.

Email: edwardzhao@gbsxj.com

Phone/WeChat/WhatsApp: +8615000725058

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