Tides and Tide Prediction
Directory of tide predictors, tide prediction software, tide information, and tide observations.
http://scilib.ucsd.edu/sio/tide/

Jenco Instruments
Jenco Instruments is an ISO9001 certified manufacturer of water quality meters and instruments such as pH meters, ORP meters, conductivity meters, TDS meters, dissolved oxygen meters, ion meters and temperature meters
http://www.jencoi.com

Elmetron
Oferujemy wysokiej jako¶ci przyrz±dy pomiarowe do pomiarów fizyko-chemicznych. pH-metry, konduktometry, jonometry, tlenomierze, termometry, wilgotno¶ciomierze do powietrza oraz grubo¶ciomierze
http://elmetron.com.pl/

Red Tide Alert
Group based on Little Gasparilla Island on the Florida Gulf Coast collects news and research links about red tide and its toxic effects on humans, sealife and animals.
http://www.redtidealert.com/

Valeport Limited
Manufacturer of hydrometric and oceanographic instruments and sensors that can be used to measure tides, currents, wave and sound velocity.
http://www.valeport.co.uk/

FRER S.r.l.
FRER e' stata fondata nel 1980 con l'ambizione di costruire prodotti elettronici ai massimi livelli di affidabilita' e di fornirli ai propri Clienti tramite un servizio pre e post-vendita ineccepibile ed ineguagliabile.
http://www.frer.it/

Elmetron
Manufacturer of high quality pH meters, conductivity meters, ion meters, thermometers, humidity meters and thickness gauges.
http://www.elmetron.com.pl/ang

InterOcean Systems, Inc.
For over 55 years InterOcean systems, inc. has been the world leader in the design and manufacture of premier quality oceanographic and environmental equipment and systems. We continually improve and broaden our line of products, and strive to accommodate each customer's requirements and needs. Our product line includes S4 Current Meters, Wave and Tide Gauges, Meteorological/Oceanographic (METOC) Buoys, Acoustic Releases, Winches and Marine Handling Systems, Hydrophones, and Remote Oil Spill Detection and Sampling. With our proven commitment to product reliability and support, you may rely on InterOcean for your marine equipment and instrumentation needs.
http://www.interoceansystems.com/

Divicom Inc.
Divicom sells surplus flowmeters flow meter Smith Brooks Daniel and metering skids for oil Terminals and Pipelines
http://www.oilmeter.com/

Tide Tool 2.2 for Palm handhelds
Software to compute tides and currents. Requires U.S. Robotics Palm Pilot. Freeware.
http://www.toolworks.com/bilofsky/tidetool/