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 remove the SmartSense sensor from a gas bottle without damaging the rubber pad? Comments 0 comments Please sign in to leave a comment.