Air Quality Monitor TVOC Formaldehyde (HCHO) Detector PM2.5 PM1.0 PM10 Micron Particulate Matter Dust Pollution Meter for Home Office School Restaurants and Hospitals: Amazon.com: Industrial & Scientific
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Mikron Metal detectors
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"STINGER 2" is an impulse metal detector with LCD display, digital and graphical presenting of the level of signal and parameters of discrimination and working regimes, such as state of temperature of the battery.