Select a rigid bearing housing or casing point that transmits the vibration of interest.
Prepare mounting
Use the M8 × 1 interface, maintain a flat clean surface and tighten to 4.1 N·m.
Check signal
Confirm −24 Vdc excitation, bias voltage, cable continuity and channel scaling before service.
System relationship: The three-wire sensor needs external −24 Vdc excitation and a compatible acceleration input channel. Maximum cable length is 305 m without signal degradation.
04 · MODEL CHOICE
Range, sensitivity and mounting
Model
Sensitivity / range
Difference
330425-02-05
25 mV/g / 75 g
M8 stud, multiple approvals
330425-01-05
25 mV/g / 75 g
1/4-28 UNF stud
330400-02-05
100 mV/g / 50 g
Higher sensitivity, lower range
330450
Separate high-temperature system
For hotter measurement locations
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05 · BUYER FAQ
Details that change measurement quality
Ⓠ Why choose 330425-02-05 instead of 330400-02-05?
Ⓐ The 330425 supports 75 g peak and 25 mV/g, making it better suited to higher acceleration levels; the 330400 offers 100 mV/g and a 50 g range.
Ⓠ Can 330425-02-05 be mounted in any orientation?
Ⓐ Yes, but the sensing axis, mounting rigidity, surface finish and 4.1 N·m torque still determine measurement quality.
Ⓠ What does the bias voltage reveal on 330425-02-05?
Ⓐ A normal bias near −8.5 Vdc indicates a powered sensor and intact circuit; a major shift can indicate wiring, excitation or sensor trouble.
Ⓠ Why can base strain affect 330425-02-05 readings?
Ⓐ Distortion at the mounting surface can couple into the piezoelectric element. A flat rigid mounting point and the correct base arrangement reduce this effect.
Ⓠ Is 330425-02-05 suitable for low-speed unbalance monitoring?
Ⓐ Its specified span begins at 10 Hz. For slower phenomena, confirm that the expected vibration frequency remains within the useful response of the complete measurement chain.