CWVS2XX1 0-2000ppm measurement range, Dual 4-20mA outputs, 1 year warranty. CE.
CWVS1XX3 0-2000ppm measurement range, 0-3/0-5/0-10VDC and 4-20mA outputs, 3 year warranty. CE.
T8100-HD: Amphronal CO2, RH & Temp Transmitter, LCD display, no relay
T8100-H: Amphronol CO2, RH & Temp Transmitter, no relay