Model 2221F High Temp Piezoelectric Accelerometer

Product catalog summary

Overview: The Endevco model 2221F is a piezoelectric accelerometer designed for high-temperature vibration measurement on small structures. It is hermetically sealed, lightweight (11 gm), and operates without an external power source. The accelerometer uses Endevco’s Piezite® type P-8 crystal element in annular shear mode, ensuring stable output sensitivity over time.

Specifications: The accelerometer has a charge sensitivity of 10.0 pC/g (typical) and a minimum of 7.5 pC/g. It features a frequency response from 1 to 10,000 Hz (±5%) and a resonance frequency of 45 kHz. The temperature range is from -67°F to +500°F (-55°C to +260°C), and it is hermetically sealed to withstand extreme conditions.

Electrical Characteristics: The unit has an output polarity where acceleration directed into the base produces a positive output. It has a resistance of ≥10 GΩ and a capacitance of 900 pF. The signal return is connected to the case, which is isolated from the mounting surface.

Environmental Characteristics: The accelerometer can handle sinusoidal vibration limits of 1000 g pk and shock limits of 3000 g pk. It has a base strain sensitivity of 0.02 g pk/μ strain and a thermal transient sensitivity of 0.004 g pk/°F (0.007 g pk/°C).

Physical Characteristics: The device is made of stainless steel, weighs 11 gm (0.39 oz), and uses a coaxial connector with a 10-32 male thread. It can be mounted using an insulated screw assembly or adhesively if needed.

Calibration and Accessories: Calibration data traceable to NIST is provided. Accessories include a cable assembly, insulated mounting screw, Allen wrench, adhesive mounting adapter, and optional signal conditioners and charge converters.

Recommendations: Endevco recommends using signal conditioner models 133, 2771C, 2775B, or the OASIS 2000 system for optimal performance. Regular calibration services are advised to maintain precision and accuracy.

Additional Notes: The low-end response depends on associated electronics, and short-duration shock pulses may cause linearity errors. Endevco reserves the right to modify specifications without notice to ensure product reliability.

Catalog excerpts

Model 2221F High Temp Piezoelectric Accelerometer-2

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 > Charge sensitivity Typical pC/g 10.0 Minimum pC/g 7.5 Frequency response See typical amplitude response Resonance frequency Hz 1 to 10 000 kHz 45 Amplitude response [1] 5% ѱ1 dB Hz .1 to 12 000 Temperature response See typical curve Transverse sensitivity % ≤ 3 Amplitude linearity % 1 Per 400g, 0 to 2000 g > Output polarity Acceleration...

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