Flow-through meter for measurement chamber to adjust specific sample flow to sensor Call for pricing on these items for other components. Testo 6740 Call us for a quote SKU: 0554 3313 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description Call for pricing on these items for other components. Testo 6740 Related products NO low replacement sensor (0-300 ppm 0.1 ppm resolution)0 out of 5 $868.00 Add to cart NO2 replacement sensor (0-520 ppm)0 out of 5 $1,044.00 Add to cart Self service replacement O2 sensor – 325-1 & 325-2 only0 out of 5 $131.00 Add to cart