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  • wholesale MQ139 freon detection sensor R134A sensor
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MQ139 freon detection sensor R134A sensor

  • item#: A0118410845803085
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      Product Details

      Product Name: Freon sensor module (with analog and TTL signal output)

      Size: 32 mm X22mm X30mm length * width * height

      Main chip: LM393, RH134A gas sensor probe

      Working voltage: DC 5V

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