Accelerometer Mounting: Stud, Adhesive or Magnetic Base?

Choose an accelerometer mounting method together with the measurement point and frequency band. A convenient attachment for a walk-around overall reading may need a different review from a permanent installation intended to capture higher-frequency vibration.

Before choosing hardware, describe the machine surface, access, measurement direction and whether drilling is permitted. Also state whether the sensor stays in place or moves between points. These details help turn a general sensor inquiry into a review of a usable installation.

Your installation question	Mounting option to review	Detail to confirm
Can a prepared threaded seat be provided?	Direct stud mounting	Drawing, thread engagement and tightening requirement
Must drilling be avoided?	Bonded mounting pad	Surface preparation, adhesive and environment
Will the sensor move between route points?	Magnetic base	Surface material, contact geometry and required band
Is a quick accessible point check needed?	Handheld probe arrangement	Applicable measurement mode and repeatability

This is a starting checklist, not an approval of a mounting method for a particular machine.

The attachment becomes part of the mechanical path from the machine to the sensing element. Added mounting mass or a less rigid connection can lower the mounted resonance and change the useful upper frequency range. The sensor's catalog bandwidth alone therefore does not establish the response of a sensor, adapter and machine-surface combination.

NI's accelerometer measurement guide explains these mounting effects and gives illustrative frequency limits. Such examples are not universal limits for every magnetic base or adhesive. Ask for the response applicable to the selected sensor and mounting arrangement over the band you need.

Keep the electrical path in the review too: sensor output, excitation, cable, receiving input and acquisition settings. Increasing a sampling-rate setting cannot establish that vibration was transmitted accurately through the attachment. The signal-interface guide covers a separate part of that measurement chain.

A correctly prepared stud-mounted connection provides a rigid attachment and is commonly used where a wide measurement band and a secure permanent installation are required. The seating surfaces should meet the selected sensor's installation requirements. A thread that bottoms out before the sensor base seats can leave poor contact even when the assembly appears tight.

PCB's mounting guidance explains surface preparation, thread engagement and tightening to the recommended torque. Use the drawing and torque specification for the actual sensor and adapter; a matching nominal thread does not establish the correct stud length or tightening value.

For a proposed installation, provide the available flat area, thread and hole-depth information, plus clearance for the connector and cable. Review any machine modification with the responsible equipment team.

A bonded pad can provide a mounting seat when drilling is unsuitable. Review the pad and bond as part of the installation, including surface condition, adhesive suitability, operating temperature and how the sensor will later be removed. A pad with a threaded sensor connection still has an adhesive interface to the machine.

Kistler's mounting comparison distinguishes adhesive bases, wax, cement and studs. Their attachment and removal characteristics differ; the word adhesive does not identify one mechanical response or environmental rating.

Specify the proposed pad and adhesive rather than requesting an unspecified glue-mounted sensor. Confirm preparation, curing and removal instructions with the relevant suppliers, and ask which frequency response applies to the assembled arrangement.

Magnetic bases allow a sensor to move between measurement points. They require a suitable magnetic contact surface and a base geometry appropriate to that surface. A flat base and a base intended for a curved surface are different arrangements. Contact quality and the added base affect the measurement, so holding firmly is not by itself a bandwidth verification.

PCB also advises controlled placement to avoid the shock of a magnetic assembly snapping onto the structure. Follow the supplied mounting instructions.

For handheld probes, request the measurement scope supported by that instrument and probe. A quick overall reading and a permanently attached dynamic measurement need not have the same usable band or repeatability. If route measurements will be compared over time, include the exact attachment in the measurement record.

Changing the sensor, magnetic base or mounting method can change the measurement response. Wilcoxon's mounting FAQs specifically discuss the effect of such changes on historical trend comparisons. Investigate the installation and settings before treating a changed reading as a machine-condition change.

A practical record for a measurement point can include:

• Machine and point identity, with measurement direction.
• Sensor model or configuration, mounting method and adapter or base identity.
• Surface location and condition, including a reference photo if available.
• Instrument mode, quantity, amplitude definition and measurement band.
• Operating speed or load and other conditions needed to repeat the measurement.

If the attachment changes, document the change and review comparability before continuing the old trend. Keep amplitude definitions such as RMS and peak in the record as well; a mounting check alone does not explain differences between those readings.

For an acceleration-sensor installation, review YD30 or YD30W acceleration and temperature sensor. Their catalog reference lists M6×1 as the default mounting thread. Confirm the supplied drawing, adapter, torque and installed response separately. The documented YD30 source differences remain unresolved and do not apply automatically to YD30W.

For portable overall checks, the CZ9500A vibration meter has integrated-sensor and external-sensor catalog variants. The external kit lists a magnetic base; the integrated kit lists long and short probes. The supplied-items table identifies those arrangements, but does not establish every attachment's usable frequency response.

Send the machine or point, required measurement band, surface material and geometry, drilling restrictions, preferred attachment and existing sensor or instrument model. Add temperature, access, cable-clearance and removal requirements where relevant. Unknown items can remain unknown in the first request.

Use Ask about this document below to keep this mounting guide attached to your request, or open a product above for a model-specific inquiry. For the choice between a meter and an analyzer, see the portable instrument task guide.