Description
Baumer PFMN is a high-accuracy hydrostatic level transmitter designed for continuous level measurement in tanks, wells, borewells, reservoirs, and industrial vessels. Using a high-stability piezoresistive sensor, it measures liquid head pressure to calculate level. Ideal for water plants, chemical tanks, ETP/STP pits, silos, and storage vessels with excellent long-term drift stability and robust stainless-steel construction.
🔧 PFMN — Key Technical Data & Selection Parameters
| Parameter | Specification / Details |
| Measurement Principle | Hydrostatic pressure (piezoresistive sensing element) |
| Measuring Range | 0…1 m to 0…250 m water column (varies by model) |
| Output Signal | 4–20 mA (2-wire), optional HART variant in some configurations |
| Accuracy | Typically ±0.25% to ±0.5% of span |
| Sensor Material | Stainless steel (AISI 316L) or chemically resistant variants |
| Cable Material | PUR / PE / Teflon (chemical or outdoor compatible) |
| Process Temperature | –10 °C to +80 °C (media dependent) |
| Overpressure Capacity | Up to 2× rated pressure |
| Protection Class | IP68 (fully submersible) |
| Vent Tube | Integrated capillary tube for atmospheric pressure compensation |
| Installation Method | Submersible drop-in type (well, tank, pit) |
| Power Supply | 12…30 VDC |
| Special Features | Sand-proof diaphragm, surge protection, moisture filtering |
| Typical Applications | Water tanks, borewells, rivers, reservoirs, ETP/STP pits, chemical tanks |
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