Variable Capacitance MEMS (VC MEMS) Accelerometers

Variable capacitance (VC) accelerometers are DC response sensors for measuring low frequency vibration, motion (constant acceleration) and tilt. With rugged construction and internal electronics, these sensors provide a high-level, low-pedance output which is stable over the wide operating temperature range. While designed for low-g measurement, they can withstand very high-g shocks. These accelerometers are suitable for trajectory monitoring, flutter testing, automotive ride quality and vehicle dynamics measurements.

Responsive Variable Capacitance Accelerometers Table
    
        VARIABLE CAPACITANCE ACCELEROMETERS
        
                Model Number
                Description
                Linear Range (g)
                Sensitivity (mV/g typical)
                Frequency Response (±5%, Hz)
                Shock Limit (g)
            

        
                3711F
                Single-ended variable capacitance accelerometer
                ±2 / ±10 / ±30 / ±50 / ±100 / ±200
                675 / 135 / 45 / 27 / 13.5 / 6.75
                0-250 / 0-1000 / 0-1500 / 0-1500 / 0-1500
                5,000
            

                3713F
                Single-ended triaxial variable capacitance accelerometer
                ±2 / ±10 / ±30 / ±50 / ±100 / ±200
                675 / 135 / 45 / 27 / 13.5 / 6.75
                0-250 / 0-1000 / 0-1500 / 0-1500 / 0-1500
                5,000
            

                3741F
                Differential variable capacitance accelerometer
                ±2 / ±5 / ±10 / ±30 / ±50 / ±100 / ±200
                1350 / 540 / 270 / 90 / 54 / 27 / 13.5
                0-250 / 0-1000 / 0-1500 / 0-1500 / 0-1500
                5,000
            

                3743G
                Differential triaxial variable capacitance accelerometer
                ±2 / ±5 / ±10 / ±30 / ±50 / ±100 / ±200
                1350 / 540 / 270 / 90 / 54 / 27 / 13.5
                0-250 / 0-1000 / 0-1500 / 0-1500 / 0-1500
                5,000
            

                7290G
                Differential or single-ended variable capacitance accelerometer
                ±2 / ±5 / ±10 / ±30 / ±50 / ±100 / ±200
                1000 / 400 / 200 / 66 / 40 / 20 / 10
                0-15 / 0-30 / 0-500 / 0-1000 / 0-2000 / 0-2000 / 0-2000
                5,000 (2, 5, 10g)
10,000 (30, 50, 100 & 200)
            

                Typical Applications
                Aircraft flight testing of flutter/buffeting and landing gear; simulated environmental testing with shakers and centrifuges; automotive testing of suspension, shock absorption, and damping; vehicle driveability, ride quality and handling; brake and steering development; and road load data acquisition (RLDA).
            

    

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