ESS Earth Sciences now manufactures Greenspan brand water quality monitoring products.

Prefix: DO = Dissolved Oxygen, PR = Pressure (depth) Remote, EC = Electrical Conductivity, PS = Pressure (depth) Submersible, OR = Oxygen Reduction Potential, TS = Turbidity Sensor, PH = pH (potential of Hydrogen). MP = Multi-Parameter logging sensors (Ø47mm, up to 3 sensors),  MQ (Ø65mm, up to 5 sensors). Suffix: A = Analogue output; D = Digital output; L = Logging sensor; T = Terminal-screw connector

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