Extech PH50
Waterproof pH Pen

  • pH range: 2 to 12pH
  • LCD displays pH eadings
  • Easy to calibrate single CAL key with automatic pH buffer recognition (4, 7, and 10pH)
  • Choice of 3 point calibration for better accuracy
  • Data hold freezes reading on display
  • Low battery indicator, Auto power off
  • For model with temperature measurements and dual LCD see: Extech PH60
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Extech PH50
Product Information
Datasheet 338 KB PDF
Manual 185 KB PDF
Click here for more Information on PDF'sPDF Help
pH Range and Accuracy 2.0 to 12.0pH
PH resolution/accuracy 0.1pH / ± 0.3pH
Power Four LR44 button batteries
Auto power off After 20 minutes of inactivity
Display Single LCD
Waterproof Meets IP67
Ordering Information
Model Description Buy Online Price
PH50Extech PH50 Waterproof pH Pen Buy NowSale $35.99
(Reg. $49.99)
Optional Configurations
PH60Extech PH60 Waterproof pH Pen with Automatic Temperature Compensation Buy NowSale $52.19
(Reg. $59.99)
Included Accessories
  • 1 - Built in electrode
  • 4 - LR44 Button Batteries
  • 1 - Sensor Cap
  • 1 - Inner pH electrode protection cap
Optional Accessories
PH103Extech PH103 Tripak Buffer Pouches (4, 7 and 10pH plus rinse solution) Buy NowSale $24.48
(Reg. $30.99)
PH4-PExtech PH4-P Pint Size Bottles with Pre-made 4pH Buffer Solution (2 Bottles) Buy NowSale $18.95
(Reg. $23.99)
PH7-PExtech PH7-P Pint Size Bottles with Pre-made 7pH Buffer Solution (2 Bottles) Buy NowSale $18.95
(Reg. $23.99)
PH10-PExtech PH10-P Pint Size Bottles with Pre-made 10pH Buffer Solution (2 Bottles) Buy NowSale $18.95
(Reg. $23.99)

*NOTE: Items ordered with optional NIST calibration will require
approximately 10 days to complete the certification.