Warranty & Registration

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Technical Support

ysi support

YSI, a Xylem brand
8 am - 5 pm EST
+1 (937) 688-4255
+1 (877) 726-0975 US

sontek support

SonTek, a Xylem brand
+1 858-546-8327

oi support

OI Analytical, a Xylem brand
+1 979-690-1711

gwi support

Global Water Instruments, a Xylem brand
+1 979-690-1711

bs support

Bellingham + Stanley, a Xylem brand
+1 678-804-5730