Micro Miniature Piezoelectric Accelerometer - A/28/E
Description
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 lightweight structures, allied to relative freedom from strain-induced error. A/28/E incorporates a mechanically preloaded shear plate sensing element. Good practice in the 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. The 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 by around 5% @ 10g. The 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)
- 0.4pC/g nom
- 0.19gm
- -50°C to 200°C Max Temp
Model variations
A/28/E and 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 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 the 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. The 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 by around 5% @ 10g. The 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 the accuracy of data. We are able to provide this service for all makes of accelerometer with a full report given for each device.
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