Portable pH Meters

Portable pH meters can be used to measure the acidity or alkalinity of a sample with excellent accuracy. Meters are designed for portability and durability. Thermo Scientific™ Elite testers are designed to be pocket-sized testers, providing on-the-go measurements for numerous applications
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Record accurate and reliable pH, mV, ORP and temperature measurements with the Thermo Scientific™ Orion Star™ A221 Portable pH Meter. This meter is ideal for a wide range of applications and advanced pH analysis in the field.
Take simple, routine pH, mV and temperature measurements with the Thermo Scientific™ Orion Star™ A121 Portable pH Meter. This meter is an easy-to-use and budget-friendly instrument for basic pH analysis in the field.
Benefit from these pocket-sized testers. Thermo Scientific™ Elite testers are designed to provide on-the-go measurements for a variety of applications including homebrew beer and wine, food and beverage, hydroponics, aquaculture and aquariums, agriculture, pools and spas, environmental monitoring,...
Waterproof pH Meter Thermo Scientific™
This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.
Benefit from these pocket-sized testers. Thermo Scientific™ Elite testers are designed to provide on-the-go measurements for a variety of applications including homebrew beer and wine, food and beverage, hydroponics, aquaculture and aquariums, agriculture, pools and spas, environmental monitoring,...
Learn More (38)
Whether you're looking for a simple pH meter on a budget, or a powerful pH meter that simultaneously measures other parameters, our pH meters are designed to help you tackle even the most complex pH measurements with confidence.
Whether in the laboratory or in the field, you need to be able to rely on your pH measurements. Using high-quality solutions to calibrate and maintain your sensors is the best way to ensure your data is both accurate and reproducible.
Documents & Support (45)
Orion Star A111 Benchtop and Star A121 Portable pH Meters
Orion Star A111 Benchtop & Star A121 Portable pH Meters Instruction Sheet [EN]