Description
Siemens 7MF0340 is a high-performance pressure/DP transmitter used extensively for hydrostatic level measurement in tanks, vessels, and pipelines. With ultra-stable piezoresistive sensing, 0.065% accuracy, SIL2/3 certification, and robust diagnostics, it delivers reliable level measurement in chemical, pharma, water, oil & gas, and general process industries.
🔧 7MF0340 — Key Technical Data & Selection Parameters
| Parameter | Specification / Details |
| Measurement Principle | Differential pressure / gauge pressure → hydrostatic level calculation |
| Sensor Technology | Piezoresistive sensor with digital compensation |
| Measuring Range | 0–25 mbar to 0–32 bar (depending on range code) |
| Level Measurement Type | Atmospheric tanks, pressurized tanks, closed vessels |
| Accuracy | Up to ±0.065% of span |
| Long-Term Stability | ≤0.125% of URL per 5 years |
| Output | 4–20 mA + HART, PROFIBUS PA, FOUNDATION Fieldbus |
| Display | Backlit LCD with diagnostics & bar graph |
| Materials (Wetted Parts) | Stainless steel, Hastelloy C276, Monel options |
| Process Connections | Threaded (½″ NPT), flanged, manifold mount |
| Turn-Down Ratio | Up to 100:1 |
| Temperature Limits | Process: –40 °C to +125 °C |
| Overpressure Limits | Up to 160 bar (depends on version) |
| Certifications | SIL2/3, Ex approvals (ATEX/IECEx) |
| Enclosure | IP67 / NEMA 4X |
| Suitable Media | Liquids, chemicals, utilities, corrosive media |
| Typical Level Applications | Chemical reactors, balance tanks, water treatment, pharma vessels, storage tanks |
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