Belimo HVAC sensors and meters offer superior reliability, easy installation, and seamless integration with major Building Automation Systems (BAS). The sensor range includes temperature, relative humidity, absolute humidity, dewpoint, enthalpy, pressure, CO₂, and volatile compounds (VOCs) for pipe, duct, and outdoor applications. Gas monitors are factory calibrated and can measure up to two different gases simultaneously. The monitors can easily be networked, with or without a central controller suited for vehicle emissions and indoor air quality. Reliable flow measurement plays an essential role in maximizing HVAC system efficiency and conserving energy. The inline flow meters utilize ultrasonic transit-time technology to perform accurate and repeatable flow measurements. The thermal energy meters are designed to EN1434 for precise flow and energy measurement equipped for IoT-based billing.