Honeywell HPM Series Particle Sensor with Universal Asynchronous Receiver/Transmitter (UART) Output allows the user to more accurately and cost-effectively monitor or control environmental particulate contaminants. Industry-leading long life of 20000 hours provides stable operation and continuous use. These HPM Series outputs at PM2.5 utilizing a laser-based light scattering particle sensing method to detect and count particles in the concentration range of 0μg/m3. This fully calibrated sensor provides proven Electromagnetic Compatibility (EMC) performance, based on IEC61000. The HPM sensors feature a response time of less than six seconds.