Expert pH Tester

Simultaneously measure pH and temperature with the Expert pH tester, a pocket sized tester designed to provide accurate measurements on the go for a variety of applications, including hydroponic gardening, aquaculture, agriculture, pools, lab work, and other liquid applications.

  • Auto-buffer recognition and auto-calibration make onsite calibration quick and easy
  • 3-point calibration allows the tester to accurately measure pH across the acid and alkaline ranges
  • ±0.1 pH unit


  • Hydroponics
  • Agriculture
  • Aquaculture and aquariums
  • Education
  • Cooling towers
  • Water treatment
  • Environmental monitoring
  • Food and beverage manufacturing


  • Power: Includes 4 batteries (A76 or LR44 equivalent)
  • Battery life: 100 hours (average)
  • Auto shut-off: 8.5 min after last key press
  • Operating temperature: 5 to 45ºC
  • Relative humidity: 5 to 85% non-condensing
  • IP67 waterproof
  • Dimensions (L x W x H): 17 x 4.5 x 3 cm


  • Range: 0.0 to 14.0
  • Resolution: 0.1
  • Relative accuracy: ±0.1
  • Calibration points: 1 to 3


  • Range: 0 to 50.0°C (32.0 to 122.0ºF)
  • Resolution: 0.1ºC (0.1ºF)
  • Relative accuracy: ±0.6°C, ±1.0°F
  • Automatic compensation: yes

Manufacturer : Thermo Orion Inc

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Cat.#Mfg.#PriceQuantityEstimated Availability
642-502-02EXPERTPH$153.45 EA  
Ships within one week

Parts & Accessories:

Cat.#DescriptionMfg.#PriceQuantityEstimated Availability
642-600-14Storage solution for pH sensor, 475 mL bottle910001$109.54 EA  
Ships from stock
642-700-02pH 4.01 buffer (NIST traceable), 20mL910425$103.21 PK / 25  
Ships within one week
642-700-04pH 7.00 buffer (NIST traceable), 20mL910725$103.21 PK / 25  
Ships within one week
642-700-06pH 10.01 buffer (NIST traceable), 20mL911025-WA$103.21 PK / 25  
Ships within one week
642-700-08pH electrode rinse solution911125$101.20 PK / 25  
Ships within one week
642-775-10Protein remover solution, 60 mL, PK/4900024$124.70 EA  
Ships within 2 weeks

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