we are offering carbon dioxide transmitter. model - esense™ ( 050-8-005) (wall mtspace mt, with disp) measurement range 0 to 2000 ppm power supply - 24 v acdc out1 linear output - 0 to 10 v dc (co2) out2 linear output - 2 to 10 v dc or 4 - 20 ma (co2) operation temperature - 0 to 50°c dimensions (h x w x d) - 100 x 80 x 28 mm accuracy - ± 30 ppm ± 3 % of reading