exstik ® conductivity/tds/salinity meter y5561ad this meter has one high- ... parameters conductivity tds salinity and temperature plus upon power up meter ... the tds value data hold auto shut-off and low battery indication the internal ... sold separately one-year warranty on meter 6 months on sensor ec400ad ec405ad ... ex006ad ex007ad ca895ad exstik ® meter spare conductivity cell weighted base w ... not interchangeable with other exstik ® meters e waterproof exstik ® ii ph/ ... conductivity/tds/salin ity meter a 556 multiprobe system by ysi rugged ... and reliable this multiprobe system ... ph salinity conductivity temperature and orp one two or three-point ph ... calibration the meter is powered by four c cell batteries or ... barometer can be user calibrated and displayed along with other data the ysi ...
2 any form of animal or plant life orp oxidation reduction potential a ... organic matter often measured with an electrode and electronic meter orthophosphate ... same temperature as the bottom waters and also in the spring when the surface ... at the margin of the littoral zone and vertically it ends at the aphotic zone ... periphyton microscopic plants and animals that are firmly attached to ... under water such as rocks logs pilings and other structures pesticide chemical ... substance used to kill and control insects or other pest species ... a nutrient that stimulates plant and algal growth eutrophication is often ... photosynthesis process by which plants and algae convert the sun s energy to ... chemical energy water and carbon dioxide are also converted to ... carbohydrates and oxygen phytoplankton microscopic ...