YF-S201 water flow sensor 4/6 points G1/2/3/4 interface for water heaters drinking fountains Hall flow meter black FS300A

YF-S201 water flow sensor 4/6 points G1/2/3/4 interface for water heaters drinking fountains Hall flow meter black FS300A
sku: 10000345866420
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$3.50
Shipping from: China
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