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Purpose: To measure the amount of oxygen dissolved in a liquid. Type of Measurement: Dissolved Oxygen Concentration (mg/L or ppm)

Purpose: To count and size the particles in the air or a liquid. Type of Measurement: Particle concentration

Purpose: To measure the cloudiness or haziness of a fluid. Type of Measurement: Turbidity (NTU - Nephelometric Turbidity Units)

Purpose: To measure the acoustic properties of materials under test. Type of Measurement: Acoustic impedance, density, elasticity

Purpose: To measure the flow rate or quantity of a gas or liquid moving through a pipe. Type of Measurement: Flow rate

Purpose: To measure the intensity of light in a part of the spectrum, especially as transmitted or emitted by particular substances. Type of Measurement: Light absorbance, transmittance

Purpose: To measure the levels of ionizing radiation in the environment. Type of Measurement: Radiation (Alpha, Beta, Gamma, Neutron rays)

Purpose: To measure wind speed. Type of Measurement: Velocity

Purpose: To determine the volumetric water content of soil. Type of Measurement: Soil Moisture

Purpose: To determine the acidity or alkalinity of a solution. Type of Measurement: Acidity (pH Level)

Purpose: To gauge water transparency or turbidity in bodies of water. Type of Measurement: Water clarity