Alarm box for 6721 no cable$421.00 Order separately as required. For 6721 Call us for a quote Product Model: 0554 6722 Alarm box for 6721 no cable quantity Add to cart SKU: 0554 6722 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description Order separately as required. For 6721 Related products Plug-in head cable0 out of 5 $81.00 Add to cart SO2 replacement sensor (0-5000 ppm 1 ppm resolution)0 out of 5 $525.00 Add to cart Replacement thermocouple for probe 0600 9542 (325)0 out of 5 $180.00 Add to cart