Features: * In accordance with ISO 2954, used for periodic measurements, to detect out-of-balance, misalignment and other mechanical faults in rotating machines. * Specially designed for easy on site vibration measurement of all rotating machinery for quality control,commissioning, and predictive maintenance purposes. * Individual high quality ccelerometer for accurate and repeatable measurements. * Optional headphones for use as electronic stethoscope. * Bearing condition monitoring function. * Use USB/RS-232 data output to connect with PC. * Provide Bluetooth data output choice. Specification: Sensor :Piezoelectric Transducer Measuring Range : Acceleration -------- Velocity 0.01~199.9mm/s True RMS Displacement -------- Frequency Range: Acceleration -------- Velocity 10Hz~1kHz Displacement -------- Accuracy: 5% of Reading+2 digits Operating Conditions: Temperature 0~50潞C Humidity <90%RH Power Supply: 4x1.5V AA(UM-3)Battery Dimensions: 160x68x32mm Weight :181g(Not Including Batteries) Standard Accessories: Main Unit Piezoelectric Transducer Powerful Rare Earth Magnet Probe(Cone)&Probe(Spherical) Carrying Case(B04) Manual Book Standard Accessories: Headset RS-232C Data Cable with Software