GMP80P probe structure 1 Optional plastic tube for gas outlet (not provided by Vaisala) 2 Magnetic hanger for attaching GMP80P to metallic surfaces 3 Hex-head screw (M4×8) for magnetic hanger 4 Gas port, suitable for ID 4 mm (approx. ID 5/32 in) polyurethane or silicone tubing 5 Condensation window 6 Gas outlet 7 CO2 measurement chamber 8 Vaisala GMP251 CO2 probe 9 M12 cable connector for CO2 probe 10 M12 connector for probe connection cable 272075SP (connection to Indigo80 indicator) 11 Type label at the back of the device 12 Gas inlet through steel pipe (optional polyurethane or Nafion™ membrane tube also available)