Ethernet plug$124.00 For 6651, 6681 Call us for a quote Product Model: 0554 6653 Ethernet plug quantity Add to cart SKU: 0554 6653 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description For 6651, 6681 Related products Testo 340 NO Replacement Sensor (Low Range) (0-300 ppm)0 out of 5 $795.00 Add to cart NO replacement sensor (0-3000 ppm 0.1 ppm resolution H2 compensated)0 out of 5 $795.00 Add to cart Self service replacement O2 sensor – 325-1 & 325-2 only0 out of 5 $131.00 Add to cart