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YSI pH10A pH Pen

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Product Description

The pH10A is the perfect instrument for economical spot sampling of pH and temperature in applications such as wastewater, surface water, aquaculture, hydroponics, pools, and education.

This ultra-compact instrument even includes a graphic display with on-screen instructions!

Available with single- or dual-junction electrodes (comes with single-junction electrode).  No need to throw this pen-style pH instrument away when the sensor goes bad like some other products.  Simply replace the electrode within minutes and keep testing!


  • 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

pH10 Instrument General Specifications

ATC Probe Thermistor, 10kΩ / 25°C
Battery Four LR44 alkalines included with purchase
Battery life 200 hours or greater (low battery indicator)
Memory Non-volatile; 50 sets (pH, temperature, date and time stamp); erase all data function
Operating temperature range 0.0 to 50.0 °C (32.0 to 122.0 °F)
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 (32.0 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
pH temp compensation Auto 0.0 to 100.0 °C (32.0 to 212 °F)
Warranty 1-year instrument; 6-months electrode
Water resistance IP-67 waterproof case
Weight 105 grams (3.7 ounces) with batteries

pH10 System Specifications

Range Accuracy Resolution
pH 0.00 to 14.00 units ±0.1 unit within 10 °C of calibration,
±0.2 unit within 20 °C
0.01 units
Temperature 0.0 to 100.0 °C
(32.0 to 212 °F)
±0.3 °C
(±0.6 °F)
0.1 °C
(0.2 °F)

Ordering Guide

Item # Description
pH10 pH10A instrument 
(includes 606110 pH electrode, batteries, instruction manual)
606110 Single-junction pH electrode (gray replacement)
605116 Double-junction pH electrode (blue)
606118 Replacement batteries and cover (4 LR44 alkaline batteries)

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