Fixed Transmitters & Controllers Simple & Advanced Monitoring & Control The SM70 and Series 100 Fixed Air Quality Monitors are supplied in PC+ABS enclosures. The Series 130 Fixed Air Quality Monitor is supplied in a FRP enclosure. The Series 900, 905, 930, 935, 940 and 945 Fixed Air Quality Monitors are for singular use or in a network solution. The Aeroqual Series 935s Transmitter / Controller is designed to measure and control gas concentrations, and to communicate to a variety of hardware systems. The Series 935s also measures Temperature and Relative Humidity and transmits this on the RS485 output. The Aeroqual Series 945s Transmitter / Controller is designed to measure and control gas concentrations, and to communicate to a variety of hardware systems. The Series 945s also measures Temperature and Relative Humidity and transmits this on the RS485 output.