NO low upgrade module (0-300 ppm low range 0.1 ppm res.)$1,075.00 For Testo 330-1 & 330-1-LL, 330-2 & 330-2-LL Call us for a quote Product Model: 0554 3931 NO low upgrade module (0-300 ppm low range 0.1 ppm res.) quantity Add to cart SKU: 0554 3931 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Description Description For Testo 330-1 & 330-1-LL, 330-2 & 330-2-LL Related products Self service replacement O2 sensor – 305/325M & XL0 out of 5 $90.00 Add to cart NO2 replacement sensor (0-520 ppm)0 out of 5 $1,044.00 Add to cart CO2 replacement sensor kit with board0 out of 5 Read more