Testo 350XL/335 & 300 O2 Replacement Sensor$445.00 Testo 350XL, 335 & 300 O2 Replacement Sensor p/n 0390 0070 Call us for a quote Product Model: 0390 0070 Testo 350XL/335 & 300 O2 Replacement Sensor quantity Add to cart SKU: 0390 0070 Category: Testo Replacement Sensors & parts for Discontinued Combustion Products Tag: Testo Replacement Sensors & parts for Discontinued Combustion Products Related products Testo 350XL HC replacement sensor 0-4%0 out of 5 $1,083.00 Add to cart Testo 350XL/335 SO2 replacement sensor (0-5000ppm)0 out of 5 $1,036.00 Add to cart Testo 350XL CO2 Replacement Sensor (0-50% Res.) NDIR0 out of 5 Read more