Endevco® Model 2228C Low Mass Triaxial Piezoelectric Accelerometer

Product catalog summary

Product Overview: The Endevco® model 2228C is a triaxial piezoelectric accelerometer designed for vibration measurement in three orthogonal axes. It is lightweight (15 gm), ground isolated, and requires no external power. The sensor is suitable for small structures and objects, featuring three 10-32 receptacles for output connection and can be mounted using screws or adhesive.

Specifications: The accelerometer operates with Endevco’s Piezite® type P-8 crystal elements in annular shear mode, ensuring stable output sensitivity over time. It has a charge sensitivity of 2.8 pC/g (typical) and a resonance frequency of 21 kHz. The frequency response ranges from 1 to 4000 Hz (±5%) and 0.1 to 6000 Hz (±1 dB). The temperature range is -67°F to +350°F (-55°C to +177°C), with a maximum transverse sensitivity of ≤5%.

Electrical Characteristics: The accelerometer has a resistance of ≥10 GΩ and capacitance of 400 pF. It is isolated from the anodized aluminum case, ensuring signal ground isolation.

Environmental Characteristics: The device is epoxy sealed and non-hermetic, with a sinusoidal vibration limit of 1000 g pk and a shock limit of 2000 g pk. It meets salt spray standards when used with a sealed connector.

Accessories and Recommendations: Recommended accessories include Endevco signal conditioners (models 133, 2771C, 2775B, 6634C) and the OASIS 2000 system. The accelerometer can be mounted using adhesives like petro-wax or cyanoacrylate epoxy, with an optional adhesive mounting kit available. Calibration services are recommended for maintaining precision and accuracy.

Additional Notes: The document includes typical amplitude and temperature response graphs, as well as detailed dimensions and mounting instructions. Endevco reserves the right to modify specifications without notice, ensuring product reliability through stringent quality control measures.

Catalog excerpts

Endevco® Model 2228C Low Mass Triaxial Piezoelectric Accelerometer-1

Model 2228C Piezoelectric accelerometer Features • NEW! 2228C-R available as replacement sensor • Triaxial • Ground isolated • Light weight (15 gm) • Requires no external power • Vibration measurement in three orthogonal axis The Endevco® model 2228C is a small triaxial piezoelectric accelerometer designed specifically for vibration measurement in three orthogonal axes on small structures and objects. The transducer features three 10-32 receptacles for output connection and can be screw or adhesively mounted. Its light weight (15 gm) effectively minimizes mass loading. The accelerometer is a self-generating device that requires no external power source for operation. The model 2228C features Endevco’s Piezite® type P-8 crystal elements operating in annular shear mode. This unit exhibits excellent output sensitivity stability over time. Signal ground is isolated from the mounting surface of the unit. Low-noise, flexible coaxial cables are supplied for error-free operation. Endevco signal conditioner models 133, 2771C, 2775B, 6634C or OASIS 2000 computer-controlled system 4990A-X are recommended for use with this high impedance accelerometer. TYPICAL TEMPERATURE RESPONSE MATES WITH ENDEVCO 3000 SERIES CABLES WITH 10-32 UNF-2B CONNECTOR CHARGE SENSITIVITY MOUNTING SURFACE MUST BE FLAT WITHIN .001. STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .02 (.X = +/- .5) .XXX = +/- .010 (.XX = +/- .25) UNIT IDENTIFICATION TYPICAL AMPLITUDE RESPONSE TYPICAL CAPACITANCE

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Endevco® Model 2228C Low Mass Triaxial Piezoelectric Accelerometer-2

Model 2228C Piezoelectric accelerometer Specifications The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75˚F (+24˚C), 4 mA and 100 Hz, unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied Dynamic characteristics Charge sensitivity Typical pC/g 2.8 Minimum pC/g 2.2 Frequency response See typical amplitude response Resonance frequency kHz 21 Amplitude response [1] ±5% Hz 1 to 4000 ±1 dB (ref) Hz 0.1 to 6000 Temperature response See typical curve at -67°F (-55°C) max/min...

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