YSI EcoSense pH10A pH Pen

The YSI EcoSense pH10A pH & Temperature Pen provides quick and accurate pH measurements


  • IP-67 Waterproof housing
  • Replaceable single- or double-junction electrodes
  • Automatic calibration and buffer recognition
List Price $137.00
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YSI EcoSense pH10A pH Pen

YSI's EcoSense pH10A pH & Temperature Pen is the perfect instrument for economical spot sampling of pH and temperature in applications such as wastewater, surface water, aquaculture, hydroponics, pools, and education. The pH10A pen features an easy-to-use graphic interface, simple one-hand operation, memory, and low cost of ownership over the life of the product.


  • Waterproof IP-67
  • 1-year warranty
  • Automatic calibration and buffer recognition
  • 50-set memory (pH, temp, date and time stamp)
  • Replaceable single- or double-junction electrode
  • GLP functionality
  • 1-, 2-, or 3-point calibration
  • Hold feature locks stable readings on the display
  • CE compliance
  • >200 hour battery life with low battery indicator
  • Operating Range: 0.0 to 50.0 C (32.0 to 122.0 F)
  • Water Resistance: IP-67 waterproof case
  • Weight with Batteries: 105 grams (3.7 ounces)
  • ATC Probe: Thermistor
  • Battery: Four LR44 alkalines included with purchase
  • Battery Life: Approximately 35 hours
  • pH Temp Compensation: Auto 0.0 to 99.9 C
  • pH Buffer Recognition: USA (4.01, 7.00, & 10.01) or NIST (4.01, 6.86, & 9.18)
  • pH Calibration Temp: 0.0 to 60 C (0.0 to 140.0 F)
  • pH Offset Recognition: +90 mV at pH 7.00 or +98.3 mV / -81.7 mV at pH 6.86
  • pH Slope Recognition: +30% at pH 4.00, 4.01, 9.18, or 10.01
  • Memory: Non-volatile; stores 50 sets (pH, temperature, date and time stamp)
  • (1) EcoSense pH10A pH & Temperature Pen
  • (4) A76 batteries
  • (1) Operations manual
Questions & Answers
What happens if I reach 50 recorded data sets?
If the memory on the EcoSense pH pen is full, the newest data set stored will overwrite the oldest saved data set.
How do I download the data?
Data from the YSI EcoSense pen cannot be directly downloaded. The 50 data set memory allows data storage within the device itself, and previous sets can be viewed with the "SCROLL" key. Exporting the data would need to be done manually.
Will the pen timestamp my data?
Yes, the EcoSense pH pen date and time stamps all data.
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