Warranty & Registration

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Technical Support

ysi support

YSI, a Xylem brand
8 am - 5 pm ET
+1 (937) 688-4255
ysi.info@xylem.com


sontek support

SonTek, a Xylem brand
+1 858-546-8327
inquiry@sontek.com


oi support

OI Analytical, a Xylem brand
+1 979-690-1711
oi-info@xylem.com


gwi support

Global Water Instruments, a Xylem brand
+1 979-690-1711
tech.support@xylem.com


bs support

Bellingham + Stanley, a Xylem brand
+1 678-804-5730
service.bs.us@xylem.com