Description
The ifm SM series are magnetic-inductive (electromagnetic) flow meters for continuous volumetric flow measurement of conductive liquids (water, wastewater, acids, alkalis, slurries — min. conductivity ≥ 5 µS/cm).
- SM6000 / SM8000 → Advanced electromagnetic flow sensors with IO-Link, high accuracy (±0.5% o.r. ±1 mm/s), and programmable K-factor / flow totalizer.
- SM7000 → Compact inline magmeter for smaller DN sizes.
- SM4100 / SM4000 / SM4120 / SM600 → Earlier / economy variants — same Faraday principle, with 4–20 mA + pulse/frequency output (some with display).
These sensors have no moving parts, are immune to viscosity changes, and provide bidirectional flow information. They require a minimum fluid conductivity and are typically flange- or wafer-mounted.
Key Features
- Measuring Principle: Faraday’s Law — U_ind ∝ v × B × L (flow velocity induces voltage in fluid)
- Fluid Requirement: Conductivity ≥ 5 µS/cm (tap water OK; demineralized water < 5 µS/cm NOT measurable)
- Output Options: 4–20 mA analog + pulse/frequency (for totalization) — IO-Link on SM6000/SM8000
- Nominal Sizes (DN): Typically DN 15 … DN 300+ depending on model (SM6000 covers common mid-range DN)
- Liner Material: PTFE, PFA, or hard rubber — selected per media compatibility
- Electrode Material: Stainless steel 316Ti, Hastelloy C-276, Tantalum — per aggressive media
- Country of Origin: Germany
Model Reference Table
Model Family | Feature Level | Output | IO-Link | Typical DN | Application |
|---|---|---|---|---|---|
SM6000 | Advanced programmable | 4–20 mA + Pulse + Totalizer | Yes (select var.) | DN 25–200 (varies) | Process & water with diagnostics |
SM8000 | High-end (larger DN / options) | 4–20 mA + Pulse + Totalizer | Yes (var.) | DN 50–300+ | Large pipe / custody transfer |
SM7000 | Compact inline | 4–20 mA + Pulse | Some vars. | DN 15–50 | Compact machine / skid mount |
SM4100 / SM4120 | Economy / established design | 4–20 mA + Pulse | No | DN 15–100 | General water / waste |
SM4000 / SM600 | Legacy / basic | 4–20 mA | No | Varies | Replacement / budget |
⚠️ Critical Selection Criteria:
Technical Specifications (Representative — SM6000 Electromagnetic Flow Sensor)
Parameter | Specification |
|---|---|
Model Example | SM6000 (ifm Electronic) — exact suffix defines DN, liner, electrode |
Measuring Principle | Electromagnetic induction (Faraday’s Law) |
Measured Medium | Conductive liquids ≥ 5 µS/cm |
Flow Range (Velocity) | 0.01 … 10 m/s (typical usable 0.3 … 6 m/s for best accuracy) |
Accuracy | ±0.5 % of reading ± 1 mm/s (after zero calibration) |
Repeatability | ≤ 0.1 % of reading |
Output Signal | 4–20 mA (2-wire loop-powered, some 4-wire with sep. 24V) + Pulse/Freq. for totalization |
Optional Digital Comm. | IO-Link (on SM6000 / SM8000 select variants) |
Process Connection | Wafer (DIN/ANSI/JIS) or Flange — per ordered suffix |
Nominal Diameter (DN) | DN 15 … DN 300+ (SM6000 typical DN 25–200) |
Liner Material | PTFE, PFA, Hard Rubber (check suffix for media compatibility) |
Electrode Material | 1.4404 (316Ti SS), Hastelloy C-276, Tantalum, Titanium (suffix dependent) |
Max. Process Pressure | Up to 40 bar (PN 40) — varies with DN & flange rating |
Process Temp. Range | -20 … +120 °C (liner dependent; PTFE up to 180 °C short term) |
Ambient Temp. | -20 … +60 °C |
Electrical Connection | M12 × 8-pin (A-coded) or terminal box — per variant |
Power Supply (Electronics) | 24 V DC (loop-powered 2-wire for analog; 4-wire versions have sep. 24V for display/IO-Link) |
Protection | IP65/IP67 (with mated connector / terminal box lid closed) |
Standards | CE, UL (component), WRAS / KTW (potable water liners on select variants), RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3–6 months warranty (where offered)
- Technical support for:
- Sizing (DN selection based on expected min/max flow — aim 0.3–6 m/s velocity)
- Liner & electrode material selection (chemical compatibility chart)
- Zero-point calibration procedure (empty pipe filled with air → zero; filled with liquid → re-zero if needed)
- IO-Link parameterization (K-factor, pulse value per liter/gallon, totalizer reset)
- Earthing / grounding ring requirement explanation
- Cross-reference vs. Endress+Hauser Promag / Krohne Optiflux / Yokogawa AXF if required
Delivery Time
- Standard delivery: 3–5 working days (stock DN/spec — custom liner/electrode may be longer)
- Express shipping available upon request
Why Choose Our Store
- Genuine ifm Electronic flow measurement products
- Global supply network with competitive pricing
- Expertise in electromagnetic flow metering & IO-Link integration
- Comprehensive technical documentation (dimensional drawings, K-factor tables, chemical resistance guide)
- Responsive customer service and support
Applications
- Water & wastewater treatment plants (raw/clean water, sludge)
- Food & beverage (CIP solution, juice, milk — with FDA-liner & EHEDG design)
- Chemical dosing (acid/alkali — PTFE liner + Hastelloy/Ta electrodes)
- Pulp & paper (black liquor, white water — rubber liner + SS electrodes)
- Machine-mounted coolant / lubricant flow monitoring
- Irrigation & municipal water distribution
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