Model 2220E Piezoelectric accelerometer Features • NEW! 2220E-R available as replacement sensor • High temperature (260°C) • Miniature design • 360° cable orientation • Hermetically sealed • Small-motor testing, APU’s, hydraulic actuators The Endevco® model 2220E is a miniature piezoelectric accelerometer designed specifically for high temperature vibration measurement on mini-structures and small objects. The unit is hermetically sealed and ideal for use in extreme environments. Its light weight (3.1 gm) effectively eliminates mass loading. The accelerometer is a selfgenerating device that requires no external power source for operation. Model 2220E features Endevco’s Piezite® type P-8 crystal element operating in annular shear mode. This configuration exhibits excellent output sensitivity stability over time. Signal ground is connected to the outer case of the unit. When used with the supplied isolated mounting screw assembly, the accelerometer is electrically isolated from ground. A specially designed, low-noise coaxial cable is supplied for error-free operation. The transducer utilizes a centrally located thru bolt, allowing 360° cable orientation. The unit may also be mounted with an adhesive. Endevco signal conditioner models 133, 2775B, 2771C, or OASIS 2000 computercontrolled system are recommended for use with this high-impedance accelerometer. M3 RECEPTACLE MATES WITH ENDEVCO 3053 CABLES TYPICAL TEMPERATURE RESPONSE TYPICAL CAPACITANCE UNIT IDENTIFICATION AND SERIAL NUMBER MOUNTING SCREW AND WASHER 2-56 UNC-2A THD (INSULATED CONFIGURATION SHOWN) MOUNTING SURFACE WASHER (USED WITH INSULATED MOUNTING SCREW ASSEMBLY) TEMPERATURE oF ( oC) TYPICAL AMPLITUDE RESPONSE STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .02 (.X = +/- .5) .XXX = +/- .010 (.XX = +/- .25)

Model 2220E 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 Minimum pC/g Frequency response Resonance frequency kHz Amplitude response [1] ±5% Hz ±1 dB Hz Temperature response Transverse sensitivity % Amplitude linearity Per 500g, 0 to 5000 g % Electrical characteristics Output polarity...