Ambient CO probe 0-520 ppm for 435$743.00 Testo 435 Call us for a quote Product Model: 0632 1235 Ambient CO probe 0-520 ppm for 435 quantity Add to cart SKU: 0632 1235 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description Testo 435 Related products Self service replacement O2 sensor – 325-1 & 325-2 only0 out of 5 $131.00 Add to cart 16′ probe connection cable0 out of 5 $105.00 Add to cart 7.2′ with 13′ stainless braided TC lead 8 pin connector0 out of 5 Read more