Micro Miniature Piezoelectric Accelerometer - A/28/E
0.4pC/g nom. ∙ 0.19gm ∙ -50°C to 200°C Max Temp
Model Variations
A/28/E & A/28/E-1 (integral 1m cable)
Features
• 0.19gm Ultra Lightweight Design
• 5.7 x Ø3.5 x 2.3mm
• Shear Plate Piezo-Ceramic
•
Adhesive mounting with detachment tool for easy mounting/removal included
Applications
- Modal Analysis of lightweight structures
- Automotive
- Aerospace
- Machine Monitoring
- Condition Monitoring
- Impact Testing
- Industrial
- Vibration Shaker Testing
- Auto/Aero structural body surveys
The A/28/E is the world’s smallest piezoelectric fully welded stainless steel accelerometer. This ultra-miniature piezoelectric vibration transducer provides virtual transparency when applied to the lightweight structures, allied to relative freedom from strain induced error. A/28/E incorporates a mechanically pre-loaded shear plate sensing element. Good practice in use of A/28/E will maximize service life. Removal from a structure involves shearing an adhesive bond, shock means are not advisable, use the detachment tool provided. Abrasive cleaning of the attachment face will reduce base thickness over time; sparing use of adhesive will aid longevity and data accuracy. Signal outlet is via a surface contact socket. A 0.8mm dia. Soft line cable is available specifically for the A/28/E. although graded anti-microphonic a certain amount of triboelectric induced noise will be generated. This together with cable induced strain may be minimized by anchoring the cable adjacent to the transducer, which should reduce measurement uncertainty around 5% @ 10g. Minimum g threshold is determined by instrumentation noise and environmental factors. A typical instrumentation (charge amplifier) noise spectral density (nsd) is around 0.02fC / √Hz above 100Hz increasing by 3dB/octave below 100Hz. Wideband noise is nsd x √bandwidth, i.e. 0.006pC/100 kHz and assumes zero input capacitance, increasing by a further 0.006pC/nF input capacitance (assuming 1nF charge amplifier transfer capacitance).
A/28/E-1 Integral Cable option.
Calibration
All DJB Accelerometers are calibrated on site prior to despatch, and are accompanied by a calibration chart with temperature and frequency responses listed. Periodic calibration can be carried out with our VC-01 Handheld Calibrator whilst we also offer a full calibration service including cross axis checks to aid accuracy of data. We are able to provide this service for all makes of accelerometer with a full report given for each device. Please contact us with an enquiry
Cable Assembly and Repair Service
- Cable Repair Service to make current cabling as good as new, cutting costs whilst good for the environment
- Specialist Cable Assembly - for all manufacturers
- Cable and connector stock held for a quick turnaround
