Schreiber SM46 Series Amplified LVDT Sensor High Pressure 315 Bar
- Manufacturer: Schreiber Messtechnik
- Category: Displacement, LVDT, Amplified LVDTs, SENSORS
The Schreiber SM46 Series inductive transducer redefines the limits of rough metrology by establishing itself as the amplified LVDT sensor Definitive for extremely high fluid pressure environments. Designed under an architecture «druckdicht» (fluid tightness), This device is machined from a solid block of stainless steel capable of withstanding the impact of 315 bar static hydraulic pressure. This armored resistance allows it to be threaded and injected directly into the armored chambers of large hydraulic cylinders, marine proportional valves, and petrochemical extrusion lines.
Far from requiring remote conditioning stages vulnerable to humidity, the SM46 houses an active electronic array in its shielded upper head (Ø 30 mm). It converts the 20 mm of usable stroke of its oil-bathed core into a clean 4-20mA or 0-10V signal ready to be fed into the control unit. It features a machined assembly according to standard specifications. DIN 6149 (M18x1.5 insertion thread and NBR 90 O-ring), is the king of the linear position sensors embedded in the heavy machinery sector, where airtight reliability is non-negotiable in the face of shock peaks of 250 g. Let's talk about stock, coupling, and modular versions.
Frequently Asked Technical Questions
- Are the stem and core of the SM46 permanently exposed to pressurized hydraulic fluid?
Absolutely. The philosophy behind the pressurized series is to immerse the stainless steel stem and NiFe magnetic core directly in the pressurizing fluid of the working cylinder. The sensor's internal chamber (coil tube) withstands this massive pressure of up to 315 bar, preventing oil from flowing back up to the head where the critical electronics are housed. - To couple and ensure a tight seal at 315 bar, what thread standard does the flange head use?
The sensor uses a fine-pitch machined M18x1.5 metric threaded insert, supported by a high-density O-ring (NBR 90). This combination complies with the parametric hydraulic injection standards DIN 6149-2 and 3, guaranteeing a seamless annular seal on the manifold block.
Properties
| Engineering Specification | Technical Values SM46 |
|---|---|
| Principle of physical measurement | Inductive LVDT (Isolated Analog ASIC Electronics) |
| Maximum static fluidic pressure tolerance | 315 Bar (Hermetic "druckdicht" version) |
| Standardization of block anchoring | Fine thread M18x1.5 (DIN 6149 Form F style attack) |
| Mechanical capture range | 20 mm continuous |
| PLC unit output signals | 4-20mA | 0-20mA | 0-10V | ±10 V Bipolar Integrated |
| Calibrated error deviation | < 0.5% constant |
| Dynamic analog frequency | Limiting frequency of 800 Hz |
| Top cover sealing (Electronics) | Up to IP67 (Restricted by the choice of M12 connector) |
| Energy excitation demanded | 20 to 32 V DC in plant for current architectures (Max 60mA) |
| Massive structural composition | Stainless Steel (Stainless Steel Tube + Stainless Steel Stem + NiFe Core) |
| vital watertight element | Mounts NBR 90 series elastomeric "O-ring" |
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