Testo 310 CO Replacement Sensor Testo 310 CO Replacement Sensor, 0-4000 ppm Call us for a quote SKU: Call Category: Testo 300 & 310 Combustion Analyzer Kits Tag: Testo 300 Combustion Analyzer Kits Description Description Related products Testo 340/350/300 28″ Hi-Temp (5/16″ Dia.) Probe & 7′ Teflon-lined Hose0 out of 5 $1,566.00 Add to cart testo BLUETOOTH®/ IRDA – printer (for models t300 and t400)0 out of 5 $411.00 Add to cart Testo 300 Combustion analyzer LL-Industrial 3-gas meter (for upgrading)0 out of 5 Read more