Dwyer PMT2-20-A-U2 particulate transmitter is a reliable and accurate device for measuring air quality. With a temperature range of -40 to 145°F (-40 to 63°C) and an accuracy of ±5% of reading, it is suitable for various environments. It operates on 12 to 28 VDC power and has a compact UL Type 4 (IP66) rated enclosure. The transmitter provides a 4 to 20 mA output signal and can detect particulate sizes as small as 0.3 microns. It is made with 316L SS, silicone, and PTFE materials for durability. With its versatile mounting options and pressure limit of 30 psi (2 bar), this transmitter is an ideal choice for air quality monitoring.