3 function probe (temp RH & flow) for 435$689.00 Testo 435 Call us for a quote Product Model: 0635 1535 3 function probe (temp RH & flow) for 435 quantity Add to cart SKU: 0635 1535 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description Testo 435 Related products Probe extension cable 16′0 out of 5 $135.00 Add to cart CO Sensor – 327-10 out of 5 $96.00 Add to cart Self service replacement O2 sensor – 305/325M & XL0 out of 5 $90.00 Add to cart