อายุงาน pH
   มีใครบอกได้บ้างว่า pH meter แบบปากกา มีอายุการใช้งานนานแค่ไหน
โดย: อ้อ [17 ส.ค. 52 13:59] ( IP A:125.26.96.60 X: )
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ความคิดเห็นที่ 1
   ไม่นานหรอกค่ะ เคยใช้แล้ว ค่า pH ก็ไม่แน่นอนเท่าไร ตกหรือกระแทกก็เสียแล้วค่ะ ตัดใจซื้อแบบแพงหน่อยดีกว่าค่ะ
โดย: .. [21 ส.ค. 52 22:30] ( IP A:112.142.249.246 X: )
ความคิดเห็นที่ 2
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โดย: t [20 พ.ย. 54] ( IP A:125.26.121.155 X: )
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