Model 813 is a high-sensitivity, variable capacitance accelerometer which measures static acceleration and lowfrequency vibration. 813 is a capacitive accelerometer family utilizes a silicon Micro-Electro-Mechanical System (MEMS) variable capacitance sensing element. The sensing element consists of a very small inertial mass and a flexure element cantilever positioned between two plates. As the mass deflects under acceleration, the capacitance between these plate changes. AC excitation and synchronous amplitude demodulation circuitry contained in the accelerometer's internal signal conditioner provides an analog output signal proportional to the applied acceleration. This output signal is scaled as a voltage which is proportional to the applied acceleration. The output signal format is single-ended 2.5±2V. The accelerometer is powered by a single regulated supply between 5.5 to 30 Vdc. The sensing element and electronics are contained in a lightweight housing with an integral cable terminated by pigtails or specified connector. Signal ground is isolated from the test object that benefit by the anodized aluminum housing. The accelerometer can be mounted by M3 metric screw or adhesive. 813 is well-suited for a wide variety of R&D or OEM applications requiring precision measurements and compact size.