Schmitt SBS (Balance Systems) SB-1440 Vibration Sensor / Transmitter

Schmitt SBS · SB-1440 · 4-20 mA Loop-Powered · IP65 · In stock

The Schmitt SBS SB-1440 is a loop-powered industrial vibration sensor / transmitter from Schmitt SBS Balance Systems (now part of the Prüftechnik / ACOEM condition monitoring family). Designed for continuous condition monitoring of pumps, motors, fans, gearboxes, compressors and blowers, the SB-1440 delivers a proportional 4-20 mA output (configurable 0-50 mm/s RMS velocity or acceleration range) and pairs directly with B&K Vibro, IMI Sensors, Schenck, Meggitt, IFM, Brüel & Kjær and Emerson CSI monitors. KOEED sources new, refurbished and legacy Schmitt SBS stock alongside the wider industrial automation spare parts catalog so you can keep critical rotating assets protected with one BOM.

Brand lineage: Schmitt SBS (US) → Balance Systems → Prüftechnik Condition Monitoring (ACOEM Group). Cross-references are commonly listed against Brüel & Kjær Vibro and IMI / PCB Piezotronics equivalents in the same machinery class.

Key Technical Specifications & Overview

The SB-1440 is a 2-wire loop-powered sensor, so the same pair of conductors carries both the 24 VDC excitation and the 4-20 mA measurement current. This makes it drop-in compatible with any standard PLC analog input card from Allen-Bradley (1756-IF8H, 1769-IF4), Siemens (SM 1231 / SM 331 AI 4xU/I), Mitsubishi MELSEC Q68ADI or Schneider Modicon BMXAMI0410 — no extra signal conditioner required.

Application Scenarios — Where the SB-1440 Fits

The SB-1440 is a general-purpose plant-floor vibration transmitter. It is most often specified for unmonitored assets that an engineer wants to bring under continuous protection without installing a full rack-based vibration monitor. Typical deployment classes include:

• Centrifugal pumps in water / wastewater, chemical and offshore service — bearing housing velocity trending against ISO 10816-3 limits.
• AC induction motors driving conveyor lines, mills and extruders; pair with Yaskawa or Schneider variable frequency drives to correlate vibration with drive-side events.
• Industrial fans and blowers in steel mills, cement kilns and HVAC plants — high-vibration environments where the IP65 body and 85 °C rating are required.
• Gearboxes and speed reducers in packaging machinery and CNC lines, where the SB-1440 sits on the input or output bearing housing next to a SYSMAC or KEYENCE sensor stack for full machine health.
• Screw and reciprocating compressors in petrochemical and refinery service — ATEX / IECEx SB-1440 / IS variant for Zone 1 hazardous areas.
• Cooling-tower gearboxes and large mixers in factory automation retrofits where the original monitor is obsolete and the loop transmitter becomes the lowest-cost path to SCADA trending.
• Robotics cells and CNC spindles — direct loop into a Fanuc or Panasonic controller's analog input to alarm on tool wear, imbalance and bearing failure.

Where plant machinery is already served by Prüftechnik / Schmitt SBS (VIBROTEST, VIBROWEB, VIBRO-LINK) or B&K Vibro, the SB-1440 is a native, drop-in transmitter — no firmware or scaling work is required on the host monitor.

Integration & Wiring Notes

Need to convert the 4-20 mA reading into engineering units, or to compute an FFT for trend plots? Try the KOEED PLC Analog Calculator and Modbus CRC Calculator before you commit the scaling block.

Installation & Commissioning Tips

1. Verify the part number on the label. The SB-1440 ships in several variants (0-25 vs 0-50 mm/s, velocity vs acceleration, standard vs ATEX). Confirm the range and hazardous-area rating match the bill of material before applying power.
2. Prepare the mounting surface. Paint, rust, and dents under the sensor base will lower the high-frequency response. Grind to bare metal, then drill and tap perpendicular to the bearing housing.
3. Hand-tighten first, then torque to spec (typically 2.7–3.4 N·m for a 1/4-28 stud). Do not exceed the stud torque — the sensor body, not the stud, takes the measurement.
4. Polarity matters on the loop. Reverse wiring shows up as 0 mA, not an over-range fault. Confirm the loop current reads between 4 and 20 mA at rest before energizing the asset.
5. Verify the loop at 4 mA and 20 mA. Use a precision mA source to inject 4 mA and 20 mA into the analog input and confirm the engineering units in the PLC read 0 mm/s and the full-scale value respectively.
6. Capture a baseline FFT. Before handing the asset back to operations, record a baseline spectrum and overall RMS at the SB-1440 mounting point. This baseline is what the alarm thresholds (Alert / Action per ISO 10816-3) are set against.
7. Document loop tag and drawing revision. Most field returns on vibration transmitters are traceable to a wrong engineering range, not a failed sensor. Tag the sensor body and update the loop drawing with the SB-1440 part number, range and calibration date.

If a sensor reading looks suspicious, the AI Diagnostic Tool on KOEED can read a sensor nameplate photo and suggest the matching SB-1440 variant or a cross-reference to B&K Vibro / IMI / IFM equivalents.

Procurement, Warranty & Lead Time

More from the KOEED catalog and engineering portal: All industrial automation parts, Mitsubishi MELSEC spare parts, Omron SYSMAC modules, Fanuc CNC servo parts, Schneider Modicon parts, Yaskawa servo drives, Panasonic FP PLCs, KEYENCE vision & sensors, Create a Quote, Real-Time Sales Records, Contact Us, About China Sourcing Company.

Questions on the SB-1440, the ATEX / IECEx variant, or the matching B&K Vibro / IMI / IFM cross-reference? Email Moritta@KOEED.COM and we will get back with availability and price within 24 hours.