How does SmartSense measure the gas levels inside a gas bottle? BMPRO Customer Support December 14, 2021 02:59 SmartSense sensors utilise ultrasonic technology to measure the gas levels. It then transmits this information to your device via Bluetooth. Related articles How do I install and pair a SmartSense sensor? Is it possible to turn off the SmartSense sensor? How do I replace a SmartSense sensor's batteries? How long will a SmartSense sensor's battery last? Why are the SmartSense default cylinder volumes 8.5kg and 3.7kg? Comments 0 comments Please sign in to leave a comment.