Description
The ifm SM7004 and related SM7xxx series are magnetic-inductive (electromagnetic) flow meters designed for continuous volumetric flow measurement of conductive liquids (≥ 5 µS/cm) in industrial and process applications. The SM7004 is a compact inline unit with dual analog output (4–20 mA for flow + 4–20 mA for temperature) , making it ideal for simultaneous flow and temperature monitoring in cooling loops, CIP systems, and process skids. Models SM7000, SM7050, SM7100, SM7604, SM7400, and SM7404 offer different flow ranges, process connections (threaded or clamp), and output configurations (IO-Link, pulse, or dual analog).
All SM7xxx sensors use Faraday’s law of electromagnetic induction — no moving parts, no pressure drop, and immune to viscosity changes. They require a minimum fluid conductivity of 5 µS/cm (tap water OK; deionized water NOT measurable).
Key Features
- Measuring Principle: Electromagnetic induction (Faraday’s Law) — no moving parts, no wear.
- Fluid Requirement: Conductivity ≥ 5 µS/cm (water, wastewater, acids, alkalis, slurries).
- Output Options: 4–20 mA analog + pulse/frequency (for totalization) — SM7004 adds second 4–20 mA for temperature.
- Temperature Measurement: Integrated Pt1000 sensor (on SM7004, SM7604) — measures media temp -25…+90 °C.
- Process Connections: Threaded (G½, G¾, G1) or hygienic clamp (Tri-Clamp) — model dependent.
- Country of Origin: Germany
Model Reference Table
Model | Flow Range (Water) | Process Connection | Outputs | Temperature Sensor | Typical Use |
|---|---|---|---|---|---|
SM7000 | 0.2 – 50 L/min | G½ thread | 4–20 mA + Pulse | No | General water / coolant monitoring |
SM7004 | 0.2 – 50 L/min | G½ thread | 2× 4–20 mA (Flow + Temp) | Yes (Pt1000) | Flow + temp monitoring in one device |
SM7050 | 0.5 – 140 L/min | G¾ thread | 4–20 mA + Pulse | No | Larger flow range, threaded |
SM7100 | 1 – 280 L/min | G1 thread | 4–20 mA + Pulse | No | High-flow threaded connection |
SM7604 | 0.5 – 140 L/min | G¾ thread | 2× 4–20 mA (Flow + Temp) | Yes (Pt1000) | Larger flow + temperature combo |
SM7400 | 0.2 – 56 L/min | Clamp (DN25) | 4–20 mA + Pulse | No | Hygienic / food grade |
SM7404 | 0.2 – 58 L/min | Clamp (DN25) | 2× 4–20 mA (Flow + Temp) | Yes (Pt1000) | Hygienic flow + temperature |
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Technical Specifications (Representative — SM7004 Dual Output Flow + Temp)
Parameter | Specification |
|---|---|
Model | SM7004 (ifm Electronic) |
Measuring Principle | Electromagnetic induction (Faraday’s Law) |
Measured Medium | Conductive liquids ≥ 5 µS/cm |
Flow Range (Water) | 0.2 … 50 L/min (0.003 … 0.83 L/s) |
Accuracy | ±0.5 % of reading ± 1 mm/s |
Temperature Measurement | Integrated Pt1000, -25…+90 °C, accuracy ±1 °C |
Output 1 (Flow) | 4–20 mA (scalable to flow range) |
Output 2 (Temperature) | 4–20 mA (scalable to -25…+90 °C) |
Pulse Output | Yes (via same pin — configurable as pulse or frequency) |
Process Connection | G½ thread (male) |
Wetted Materials | Stainless steel 1.4404 (316L), PEEK liner, FKM seals |
Max. Pressure | 16 bar (PN16) |
Media Temperature | -25 … +90 °C |
Ambient Temperature | -25 … +70 °C |
Electrical Connection | M12 × 8-pin (A-coded) |
Protection | IP67 / IP69K (with mated connector) |
Dimensions | Approx. 80 mm × 82 mm × 42 mm (body) |
Weight | ~ 390 g |
Standards | CE, UL (component), RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for:
- Flow range selection (match to expected min/max flow velocity 0.3–6 m/s)
- Output scaling (4 mA = 0 L/min, 20 mA = max range — programmable via software)
- Temperature output scaling (4 mA = -25 °C, 20 mA = +90 °C default — adjustable)
- Wiring (M12 8-pin: brown=+24V, blue=0V, black=Out1 flow, white=Out2 temp, grey=pulse)
- Cross-reference vs. Bürkert 8041 / Krohne OPTIFLUX / Endress+Hauser Promag
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine ifm Electronic flow sensors
- Global supply network with competitive pricing
- Expertise in magnetic-inductive flow measurement & IO-Link integration
- Comprehensive technical documentation (datasheets, wiring diagrams, scaling guides)
- Responsive customer service and support
Applications
- Cooling water monitoring: Machine tool coolant, laser chillers, welding guns
- CIP (Clean-in-Place) loops: Flow + temperature in one sensor for hygienic validation
- Process water / wastewater: Inline flow monitoring with temperature compensation
- Food & beverage: Dairy, beer, juice flow monitoring (with clamp models)
- HVAC: Chilled water / condenser water flow monitoring
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