The PCE-VM 40C Vibration data Logger with SMS alert functionality was designed for vibration and shock metering on buildings, bridges, towers, and other artificial structures. The Vibration data Logger measures vibrations in accordance to DIN 4150-3, BS 7385 and SN 640312A standards. With its internal memory for up to 100,000 readings, the PCE-VM 40C Data Logger can determine the effects of construction sites, traffic, or industrial processing on buildings over a long period of time. Features a micro SD card, GSM modem (optional), warning and alarm leds, relay output, SMS alerts, and an internal battery. These vibration logging test instruments are manufacturer calibrated. An ISO calibration certificate is an option.