Technical Data Sheet: KROHNE OPTISWIRL 4070/C
1. Core Identification
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Manufacturer: KROHNE Messtechnik GmbH (Duisburg, Germany)
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Model: OPTISWIRL 4070/C (Compact version)
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Serial Number (SN): D100000001655073
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Year of Manufacture (MD): 2010
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Measuring Principle: Karman vortex street (Vortex shedding technology)
2. Process Specifications
| Parameter | Specification (from label) |
| Nominal Size & Pressure | DN50 PN40 (50mm pipe, 40 bar max) |
| Medium / Software | Saturated Steam (Sattdampf) |
| Density (approx.) | $3.77223 \text{ kg/m}^3$ |
| Operating Temperature | $166.2^\circ C$ (at reference point) |
| Operating Pressure | 6.2 bar ü (gauge) |
| Max. Temperature ($TS$) | $240^\circ C$ ($464^\circ F$) |
| Max. Pressure ($PS$) | 40 bar |
| Test Pressure ($PT_{max}$) | 76 bar |
3. Electrical & Signal Data
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Supply Voltage ($U$): 14…36 VDC
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Output Signal: 4…20 mA (HART protocol)
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K-factor: 9089.46 Pulse/m³
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Technology: 2-wire technology with integrated pressure and temperature compensation
4. Materials & Construction
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Sensor/Wetted Parts: 1.4435 (316L Stainless Steel)
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Gasket/O-ring: FPM
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Housing: Aluminum (Blue/Silver)
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Protection Class: IP66/67
Installation Highlights
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Integrated Compensation: This specific unit is configured for “Sattdampf” (Saturated Steam). It uses its built-in temperature and pressure sensors to provide direct mass flow measurement.
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Flow Direction: Ensure the meter is installed with the flow matching the arrow on the sensor body.
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Straight Runs: For optimal accuracy, maintain a minimum inlet run of $20 \times DN$ and an outlet run of $5 \times DN$.
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