Product Service

For SonTek service-related inquiries, please visit us at SonTek Total Care

Authorized Service Center Locations

YSI has several Authorized service centers located globally to provide timely repair and updates to your YSI instruments. For the service center nearest you, select from one of the following locations. If no authorized center is near your location, contact your regional YSI office, YSI dealer, or YSI Brand Headquarters to arrange for service.  

Repair Status Checker

Sent an instrument to YSI and need its status?

Check the Status of a Repair

New Factory Service Plans

Affordable Service Plans are available for purchase with new EXO Sondes and ProDSS Meters! Plans cover preventative maintenance and standard replacement parts. Optimize the performance and lifetime of your new instruments by adding a Factory Service Plan.

View EXO Factory Service Plans

View ProDSS Factory Service Plans

Returning a Product for Service

When returning a product for service to any of the US YSI Offices, please complete the Product Return Form and send with your shipment. *Please note: Be sure to return equipment for service in original packaging to avoid additional packaging charges. An additional charge may appear on the service quote to accommodate safe return shipping of your equipment.

Product Return Form with Instructions

Shipping Lithium-Ion Batteries

Please do not ship damaged or potentially defective batteries to YSI or any of our authorized service centers unless instructed otherwise. If you have any questions or concerns, please contact YSI Technical Support.  Read the Shipping Lithium Ion Batteries Product Notice for additional information. 

Shipping Lithium Ion Batteries Product Notice

United States Service Centers


TTT Environmental Instruments and Supplies
Handheld Sampling & Laboratory Meters
Anchorage, Alaska USA
+1 907-770-9041
+1 907-770-9046 Fax


EQUIPCO Sales and Service
Handheld Sampling, Laboratory Meters, 6-Series Sondes​
Concord, California USA
+1 888-234-5678
+1 925-609-1080 Fax


Geotech Environmental Equipment, Inc.
Handheld Sampling, Laboratory Meters, 6-Series Sondes​
Denver, Colorado USA
+1 303-320-4764
+1 303-322-7242 Fax


Aquatic Equipment & Design, Inc.
Handheld Sampling & Aquatic Equipment
Mount Dora, Florida USA
+1 (407) 995-6490
+1 (407) 641-9172 Fax


Certified Balance & Scale
Handheld Sampling & Laboratory Meters
Sycamore, Illinois
+1 815-895-5158

USA Bluebook
Handheld Sampling & Laboratory Meters
Waukegan, Illinois USA
+1 800-548-1234
+1 847-689-3030 Fax


YSI Incorporated, 
Brand Headquarters

All YSI Product Lines & Conductivity Cells
Yellow Springs, Ohio USA
+1 937-767-7241
+1 800-765-4974 (US)
+1 937-767-9353 Fax

Fondriest Environmental
Handheld Sampling, Laboratory Meters, 6-Series Sondes​
Fairborn, Ohio USA
+1 937-426-2151
+1 937-426-1125 Fax


North Central Labs
Handheld Sampling & Laboratory Meters
Birnamwood, Wisconsin USA
+1 800-648-7836
+1 715-449-2454 Fax

International Service Centers

Africa, Europe, Middle East

Xylem Analytics UK​
Letchworth, United Kingdom​
+44 1462-673581

Xylem ME Water Eqpt. Trading & Rental LLC
Dubai, United Arab Emirates​
+971 4 806 1100


Xylem Analytics (Beijing) Co., Ltd.
Beijing, China

Xylem (Hong Kong) Ltd.
Tsuen Wan, N.T., Hong Kong
+852 2945-0160
+852 2741-6605 Fax

Xylem Analytics Japan
Kawasaki City, Japan
+81 44-222-0009
+81 44-222-1102 Fax

Xylem Water Solutions Singapore Pte Ltd
6 Wan Lee Road, Singapore 627937
+65 6976 0370

CV Alphamas
Handheld Sampling, Laboratory Meters
Jakarta, Indonesia
+60 3-6276 2323

Dakila Trading Corporation  
Handheld Sampling, Laboratory Meters
Mandaluyong City, Philippines
+63 2 724 7511

Handheld Sampling, Laboratory Meters, EXO & 6-Series Sondes
Seoul, South Korea
+8210 8629 1115

GEM (General Enterprise Marketing)
Handheld Sampling, Laboratory Meters
Bangkok, Thailand

Green Banyan
EXO & 6-Series Sondes
Bangkok, Thailand
+66 2428-9512-6

Handheld Sampling, Laboratory Meters, EXO & 6-Series Sondes
Ho Chi Minh City, Viet Nam
+84 8 6272 9404

SALT (Sea and Land Technology)
EXO & 6-Series Sondes
Singapore, Singapore
+65 6716 0777

Handheld Sampling, Laboratory Meters
Singapore, Singapore
+65 6748 9029

Handheld Sampling, Laboratory Meters, EXO & 6-Series Sondes
Taipei, Taiwan
+886 2-2999-5767

Todays Instruments
Handheld Sampling, Laboratory Meters
Taipei Hsien, Taiwan
+886 2-2603-2311


Xylem Analytics Australia
Handheld Sampling, Laboratory Meters, EXO & 6-Series Sondes
Hemmant, QLD Australia​
+61 7 3908 4000

North America

Hoskin Scientific Ltd.
Handheld Sampling, Laboratory Meters,
EXO & 6-Series Sondes

Oakville, Ontario, Canada
+1 905 333-5510
+1 905 333-4976 Fax

Burnaby, British Columbia, Canada
+1 604 872-7894
+1 604 872-0281 Fax

Edmonton, Alberta, Canada
+1 780 434-2645

Montreal, Quebec, Canada
(514) 735-5267

Equipesca de Obregón, S.A. de C.V.
Handheld Sampling & Laboratory Meters
Cd. Obregón, Sonora, Mexico
+52 (01) 644 410 7500 ext 104, 130

Handheld Sampling & Laboratory Meters
Culiacan, Sinaloa, Mexico
+52 667-761-2705

South America

Clean Environment Brasil
Handheld Sampling, Laboratory Meters, EXO & 6-Series Sondes
Campinas, SP Brasil​
+55 19 3794-2900
+55 19 3794-2919 Fax

Tecnalise Piracicabana
Handheld Sampling & Laboratory Meters
Piracicabana, Sao Paulo, Brasil
+55 19 2105-6161

Bernauer Aquacultura
Handheld Sampling & Laboratory Meters
Benedito Indaial, Brasil
+55 47 3334-0089

Handheld Sampling, Laboratory Meters, 6-Series Sondes
Santiago, Chile
+56-2-209-8853 Fax

Handheld Sampling & Laboratory Meters
Guayaquil, Ecuador
+593 4-3905-000
+593 4-3904-019 Fax

ARSA Representaciones
Handheld Sampling, Laboratory Meters, 6-Series Sondes
San Isidro, Lima 27 - Peru
+51 1 440-2105
+51 1 441-5218 Fax

Central America

Handheld Sampling, Aquaculture Products
Choluteca, Honduras
+504 99092625
+504 99089733 Fax

Life Science Service Centers

Life Science Product Line currently includes: 2300, 2900, 2900M and 2950. 

For service outside the United States, contact the YSI distributor from whom the product was purchased or a YSI International Service Center. In the United States, during the product's warranty period, contact YSI Life Sciences Technical Support for service. If the warranty has expired, you may return your product to YSI for service by following the product return instructions above.

YSI Incorporated

Repair Center
1725 Brannum Lane
Yellow Springs, Ohio 45387
937 688-4255
Fax 937 767-9353


Mandel Scientific Company Inc.
Guelph, ON, Canada

Xylem Analytics UK

Longfield Road
Tunbridge Wells, Kent
TN2 3EY United Kingdom
+44 (0)1892 500 400


System C Industrie
26130 Saint-Paul-Trois-Châteaux – France
+33 4 75 54 86 00


Xylem Analytics (Beijing) Co., Ltd.
Beijing, China