An IoT Sensor is a connected device that continuously measures environmental or equipment conditions and transmits data wirelessly to cloud platforms or local control systems for analysis and automated response. In HVAC applications, IoT sensors monitor temperature, humidity, air quality, and equipment performance.
Common HVAC Sensor Types
Temperature sensors measure indoor and outdoor conditions with accuracy of plus or minus 0.5 degrees Fahrenheit. Humidity sensors detect moisture levels between 20 and 80 percent relative humidity. Pressure sensors monitor refrigerant pressure in cooling systems (0 to 500 PSI range), and occupancy sensors detect room occupancy within 15 feet using passive infrared or microwave technology.
Data Communication
IoT sensors transmit readings via WiFi at 2.4 or 5 GHz, Zigbee at 2.4 GHz with 100 to 300 foot range, or LoRaWAN at frequencies up to 3 miles in open areas. Transmission intervals range from 1 second to 15 minutes based on application requirements, with battery-powered sensors lasting 2 to 5 years on standard alkaline cells.
System Integration
Sensor data feeds into smart thermostats, building management systems, or cloud analytics platforms enabling predictive maintenance, energy optimization, and automated HVAC control responses triggering within 30 to 60 seconds of sensor input.