Portable pH Meters | Thermo Fisher Scientific

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Yes (1)
Yes (Selectable) (3)

ORP (1)
pH, relative mV (RmV) and temperature (2)
pH, relative mV (RmV), ORP and temperature (3)
pH, temperature (1)

1 (1)
1 (relative mV), 1 (ORP) (1)
1 to 3 (3)
1 to 5 (2)

1000 with Date and Time Stamp (3)
50 (2)

Graphic Dot Matrix (1)
LCD (2)
LCD, Graphic with Backlight (3)

Automatic with Auto-Read Measure Mode, Manual with Continuous Measure Mode (5)

±1600.0 (2)
±2000 (3)
-1000 to 1000 (1)

-1 to 15 (2)
-2 to 16 (2)
-2 to 20 (3)

0.001, 0.01, 0.1 (3)
0.01 (2)
0.01, 0.1 (2)

Online Offer (8)

-5°C to +105°C (5)
0°C to 60°C (3)

Orion Star™ A221 Portable pH Meter

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.

Orion Star™ A121 Portable pH Meter

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.

Elite ORP Pocket Testers and Replacement Sensors

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,...

Elite pH Pocket Testers and Replacement Sensors

pH & ORP Meters

Unlock precision and performance with Orion bench and portable pH/ORP meters. Whether in the lab or the field, achieve accurate measurements for pH and oxidation-reduction potential (ORP). Our bench pH/ORP meters are expertly engineered to provide precise laboratory analysis- featuring advanced...

Electrode Filling Solutions

Use Thermo Scientific™ Orion™ pH Electrode Filling Solution with pH electrodes and reference electrodes. Packaged as five 2 oz. (5 x 60mL) bottles. Orion Solutions, Standards and Buffers Overview Download Brochure, pH and ORP Buffers & Solutions pH Buffers & ORP Standards, Electrode Storage &...

Manual / Product Insert

Orion 266S Intrinsically Safe pH Meter

Product Literature

Orion Star A221 pH Portable Meter