Schreiber SM42 Series Amplified LVDT Sensor Ø 25 mm Extra Long
- Manufacturer: Schreiber Messtechnik
- Category: Displacement, LVDT, Amplified LVDTs, SENSORS
The Schreiber SM42 Series inductive transducer belongs to the elite of the amplified LVDT sensors, Specifically designed to monitor massive displacements in mechanical infrastructure. Unlike classic differential transformer LVDTs, the SM42 bases its readings on an advanced physical principle of partial coil inductance distribution («Partiellen Induktivitätsverteilung»). This technological leap allows its integrated electronics to process enormous mechanical ranges in analog form — from 80 mm to incredible 360 mm usable— without needing to oversize the dead length of the 25 mm diameter stainless steel chassis.
Designed for monitoring hydraulic gates, rolling mill cylinders, and pipe thermal expansion, the SM42 delivers the conditioned signal directly to the machine. It features profiles of current (4-20 mA) or double voltage (±10 V), This eliminates signal attenuation over long runs to the PLC. These qualities place it at the top of our range. linear position sensors for heavy industry, guaranteeing readings with deviations less than 0.5% under brutal mechanical shock spectra of up to 250 g SRS. Ask us about variants with extreme protection in Kynar or integrated M5 ball heads.
Frequently Asked Technical Questions
- What advantage does the SM42's "partial inductance" principle offer compared to a standard SM40 Series sensor?
Partial induction allows for the extraction of a much higher density of magnetic information about the relative position of the NiFe core per millimeter traveled. In practical terms for the integrator, this means that the SM42 can read much longer physical travel distances (up to 360 mm) while maintaining excellent linearity of 0.25%, something unattainable with a standard LVDT bridge. - For an installation where there are lateral mechanical pulls, can I secure the LVDT stem?
Yes. The SM42 series has factory sub-variants such as the ".F" version (captured rod guided by a protective brass bushing) or the ".G" and ".H" terminations that include formidable spherical mechanical ball joints to absorb any angular misalignment in the industrial traction process.
Properties
| Engineering Specification | Technical Values SM42 |
|---|---|
| Principle of physical measurement | Partial Inductance Inductive LVDT (Magnetic Distribution) |
| Armored structural dimension | Ø 25.0 mm (Stainless Steel) |
| Standardized mechanical ranges | 80mm | 170mm | 240mm | Extra long 360mm |
| Internal conditioning | Integrated analog amplifier matrix (Active output) |
| Unified operational signals | 0/4-20 mA | 0-10 V | ±10 V (Bipolar for center zero cycle) |
| Geometric positional resolution | Infinite (Micro-electromagnetic movement passing without jumps) |
| Error deviation (Linearity) | < 0.5% general base | Premium selection of < 0.25% |
| Carrier dynamism band | Extremely high bandwidth at 800 Hz |
| Degree of sealing and pressurization | IP66 with BI423 threaded connector (Withstands industrial pressure water) |
| Required polarization voltages | 20-32 V DC for current loops | Dual ±13-16 V DC voltage sources |
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