জেট্রন DM7800 নেগেটিভ অক্সিজেন আয়ন ডিটেক্টর

Video Description:
Discover the Zetron DM7800 Negative Oxygen Ion Detector, a high-precision device for testing air quality. It measures ION, PM2.5, PM1.0, PM10, HCHO, temperature, and humidity with accuracy and durability. Perfect for environmental monitoring and health safety.
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