This product is designed with artificially polarized ceramic piezoelectric effect. It is suitable for monitoring various vibration machinery equipment, especially vibration measurement of rotating and reciprocating machinery. The device can measure acceleration, velocity and displacement, and is widely used in machinery manufacturing, electric power metallurgy, general aviation and other fields.feature:Small and portable design, easy to use.Measuring range: Acceleration: 0.1-199.9m or s peak value Velocity: 0.1-199.9mm or s rms Displacement: 0.001-1.999mm p-p.Different vibration frequency selection (high frequency is only used in acceleration measurement mode).High-sensitivity probes for precise measurements.Long and short probes are available, each suitable for measurement in different situations.Equipped with AC signal output interface.Low battery indicator, automatic shutdown function.Widely used in machinery manufacturing, power metallurgy, general aviation and other fields.Specification:LCD display: 3 1 or 2 digit display with backlightAcceleration: 0.1-199.9m or s peakSpeed: 0.1-199.9mm or s rmsDisplacement: 0.001-1.999mm p-pMeasurement accuracy: 5 percent 2digitsVibration Sensor: Piezoelectric Ceramic AccelerometerMeasurement frequency: acceleration: 10Hz-1KHz (LO) 1KHz-15KHz (HI)Speed: 10Hz-1KHz (LO)Displacement: 10Hz-1KHz (LO)Display update cycle: 1 secondSingle output: AC output 2V peak (full scale displayed)Can be connected to headphones with a load impedance of 10K or abovePower: 1 x 9V alkaline battery (not included)Quiescent current: 20uAWorking current: 25mAAutomatic shutdown: automatic shutdown after 60 secondsLow battery indicator: 6.9V 0.2VWorking environment: 0-40C, 30-90 percent RH