JENCO 610 Pen pH Meter Manual,OI

• 
  Qiwei PH-220B Pen Acidity Meter (Backlit)

  0.01~14.00pH±0.02PH0.01PH

  ¥210.0

  SE
• 
  Qiwei PH-20 pen pH meter pH range 0.1~ 14pH

  0.1~14pH±0.1pH1.5V battery (LR44) * 4PCS

  ¥170.0

  SE

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