The PPMonitor continuously detects, measures and records a variety of parameters, including temperature, humidity, formaldehyde, nitrogen dioxide, carbon monoxide, carbon dioxide, sulfur dioxide, ozone, ammonia and total volatile organic compounds (VOCs). The monitor’s real-time functions provide immediate warnings of the presence of harmful gases in the air. It communicates via the Zigbee wireless mesh network, which can be extended easily by adding repeater nodes or additional PPMonitor units.