GMP251 and GMP252 are robust carbon dioxide (CO2) measurement probes for use in demanding applications such as life science incubators. Operating temperature range −40 ... +60 °C (−40 ... +140 °F). The CO2 probe mounting kit (Vaisala item ASM214253SP) is recommended for mounting, but the probes can also be attached from the probe body by other methods. GMP251 probe GMP252 probe 1 M12 5-pin male connector. Connect to VDL200 using the included M8-M12 adapter cable (item code CBL211291SP). 2 Ø 25 mm probe body. 3 Sensor protection filter. Do not attach from this area.