Digital Hygrometer Temperature & Humidity Meter

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Digital High Precision H2 Gas Tester (0-1000PPM Range) Silver String Group Provides You the portable hydrogen (H2) detector is designed to detect and measure hydrogen gas concentrations. When hydrogen is detected, the concentration will be shown on the LCD screen. The instrument features both low-concentration and high-concentration alarms, which are user-adjustable. If the detected hydrogen level exceeds the preset alarm threshold, the device alerts the user through sound, light, and vibration.   Factors Impacting Cost Variations: Ulfm/Lpcb/Kitemark/Local-Standard/Etc. Local/China/Japan/Usa/Uae/Etc. Different Types of Sizes Etc. Quality/Gauges/Strength/Etc.