Testo 340 CO Sensor Upgrade (0-10000 ppm H2 compensated)$1,974.00 Testo 340 CO Sensor Upgrade (0-10,000 ppm, H2 compensated) p/n 0554 2100 Call us for a quote Product Model: 0554 2100 Testo 340 CO Sensor Upgrade (0-10000 ppm H2 compensated) quantity Add to cart SKU: 0554 2100 Category: Testo 340 - Combustion Analyzer Kits Upgrades Accessories Sensors & Probes Tag: Testo 340 - Combustion Analyzer Kits Upgrades Accessories Sensors & Probes Related products Testo 340 NO2 Sensor Upgrade (0-500 ppm 0.1ppm resolution)0 out of 5 $1,974.00 Add to cart Testo 340 Upgrade Kit – O2 (Note: Must add at least one other upgrade sensor to operate)0 out of 5 Read more Testo 340 Replacement Filter for NO Sensor (Blocks SO2)0 out of 5 $210.00 Add to cart