Flame Detectors (98 companies)
Flame detectors monitor and analyze incoming radiation at selected wavelengths.
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Heat Detectors (37 companies)
Heat detectors are fire detection devices that sense heat produced by combustion.  Heat detectors can trigger an alarm when they detect rapid temperature rise or reach a preset temperature.
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Humidity Measurement Instruments (404 companies)
Humidity measurement instruments test for absolute humidity, relative humidity, or dew point in air.
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Leaf Wetness Sensors (7 companies)
Leaf wetness sensors are used to detect the presence of surface moisture. Learn more about Leaf Wetness Sensors

Moisture Meters (504 companies)
Moisture meters are used to measure the moisture content in bulk solids, liquids and gases.
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Photometers and Colorimeters, Water Quality (106 companies)
Water quality photometers and colorimeters are ion-specific computer-interfaced probes designed to determine the concentration of a solution from its color intensity.
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Radiation Detectors (150 companies)
Radiation detectors are used for medical diagnoses, radioactive dating measurements, and measurements of background radiation, activity levels and radiation doses.
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Refractometers (109 companies)
Refractometers measure the critical angle of refraction through a sample. The critical angle of refraction will change with concentration.
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Smoke Detectors (162 companies)
Smoke detectors are designed to sense the products of combustion. Common types include ionization chambers and photoelectric devices.
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Solar Radiation Instruments (38 companies)
Solar radiation instruments measure the spectral range of radiation, including global solar radiation (sun + sky), net radiation (incoming solar - reflected solar) and the photosynthetic light spectrum.
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Temperature Instruments, All Types (2003 companies)
Temperature instruments use contact or noncontact methods to measure temperature. Products include dial, digital, industrial and laboratory thermometers; temperature probes, indicators, and sensors; RTD elements and transmitters; and thermistors, thermocouples, thermopiles, and thermal switches. 
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UV Sensors (29 companies)
UV sensors are designed to measure the power or intensity of incident ultraviolet (UV) radiation.
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Visibility Sensors, Dust Sensors and Opacity Sensors (58 companies)
Opacity sensors, dust sensors and visibility sensors measure the amount of light transmitted through a sample.
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Water Quality Testing Instruments (211 companies)
Water quality testing instruments are used to test water for chemical and biological agents, and to measure variables such as clarity and rate of movement.
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Weather Instruments (243 companies)
Weather instruments are designed to measure one or multiple components of weather including wind speed and direction, rain or snow fall, solar radiation, temperature, pressure and humidity.
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