# data[].attributes.definition
An air quality sensor is an electronic device that detects and measures the concentration of pollutants, gases, and particulate matter in the air, often including humidity and temperature, to monitor indoor or outdoor air quality in real time.

# data[].attributes.definition
An air quality sensor is an electronic device that detects and measures the concentration of pollutants, gases, and particulate matter in the air, often including humidity and temperature, to monitor indoor or outdoor air quality in real time.

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Combined sensor for measurement of temperature and relative humidity in air (standard meteorological probe)

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An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.

# data[].attributes.definition
An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.

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A generic term for a mechanical device for measuring wind speed and direction designed for use where no information on instrument make, model or measurement principle are obtainable.

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An electrical device that converts electric power into radio waves and vice versa.

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An electrical device that converts electric power into radio waves and vice versa.

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In-situ instruments that can determine the proportion of one or more gaseous components of the atmosphere.

# data[].attributes.definition
An instrument that measures atmospheric pressure.

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A device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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A device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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Two or more wires running side by side and bonded, twisted, or braided together to form a single assembly.

# data[].attributes.definition
Two or more wires running side by side and bonded, twisted, or braided together to form a single assembly.

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A device used to create photographic images

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A device used to create photographic images

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An electroinic device that limits the rate at which electric current is added to or drawn from electric batteries.

# data[].attributes.definition
An electroinic device that limits the rate at which electric current is added to or drawn from electric batteries.

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Electronic devices that records data over time either with a built in or external sensors

# data[].attributes.definition
Electronic devices that records data over time either with a built in or external sensors

# data[].attributes.note
20260225: changed from "Distrometer" to "Disdrometer"

# data[].attributes.definition
An electrical conductivity meter (EC meter) measures the electrical conductivity in a medium.

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A device used to measure parameters of fluorescence, including its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light.

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A device used to measure parameters of fluorescence, including its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light.

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A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected waveforms.

# data[].attributes.definition
A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected waveforms.

# data[].attributes.term
Global positioning system (GPS) receiver

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A device that accurately calculates geographical location by receiving information from Global Positioning System satellites.

# data[].attributes.term
Global positioning system (GPS) receiver

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A device that accurately calculates geographical location by receiving information from Global Positioning System satellites.

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Physical weighing on an analytical balance.

# data[].attributes.provenance
gravimetry entry of the NERC Vocabulary Server (NVS).

# data[].attributes.definition
Physical weighing on an analytical balance.

# data[].attributes.provenance
gravimetry entry of the NERC Vocabulary Server (NVS).

# data[].attributes.definition
A graduate wooden, fiberglass, or aluminum rod used to determine differences in elevation.

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A graduate wooden, fiberglass, or aluminum rod used to determine differences in elevation.

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A type of evaporation gauge that consists of a tank or pan of soil placed in a field and manipulated so that the soil, water, thermal, and vegetative properties in the tank duplicate as closely as possible the properties of the surrounding area.

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An instrument for measuring differences of pressure.

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A penetrometer is a device to test the strength of a material.

# data[].attributes.definition
A penetrometer is a device to test the strength of a material.

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An electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another (e.g., solar to chemical).

# data[].attributes.definition
An electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another (e.g., solar to chemical).

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A sensor that measures pressure, typically of gases or liquids.

# data[].attributes.definition
A sensor that measures pressure, typically of gases or liquids.

# data[].attributes.definition
The standard instrument for measuring solar radiation incident on a horizontal surface by measuring the temperature of a black body target that has been calibrated in terms of radiative flux. Sensitive to wavelengths between 300 and 3000 nm.

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A device that measures the atmospheric infra-red radiation spectrum that extends approximately from 4.5um to 100um.

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A device that transfers information via electromagnetic signals through the atmosphere or free space.

# data[].attributes.definition
A device that transfers information via electromagnetic signals through the atmosphere or free space.

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A device used to collect specimens for later ex situ analysis.

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A device used to collect specimens for later ex situ analysis.

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A device that detects events or changes in quantities and provides a corresponding output, generally as an electrical or optical signal.

# data[].attributes.definition
A device that detects events or changes in quantities and provides a corresponding output, generally as an electrical or optical signal.

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A photovoltaic module that is electrically connected and mounted on a supporting structure.  Used to generate and supply electricity.

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A photovoltaic module that is electrically connected and mounted on a supporting structure.  Used to generate and supply electricity.

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An electronic and optical instrument used in modern surveying and building construction.  A total station is an electronic theodoloite integrated with an electronic distance meter to read slope distances from the instrument to a particular point.

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An electronic and optical instrument used in modern surveying and building construction.  A total station is an electronic theodoloite integrated with an electronic distance meter to read slope distances from the instrument to a particular point.

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A water quality sensor that monitors light reflected off the particles suspended in water.

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A water quality sensor that monitors light reflected off the particles suspended in water.

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A water quality monitoring instrument having multiple attached sensors.

# data[].attributes.definition
A water quality monitoring instrument having multiple attached sensors.