• automatic and manual temperature compensation for accurate readings
• ORP or temperature electrode connectivity for additional functionality
• IP54 protection shields water / dust damage
• 30 measurement library stores data for future reference
• auto buffer recognition stores calibration data to help avoid calibration process errors

The ST300 portable pH meter offers convenience, reliability and durable construction in an ergonomic compact design. Intuitive software and a well-organized display make it user friendly. Convenient, built-in, retractable stand. Five, clearly marked keys offer simplicity for novices and professionals alike. IP54 protection shields the portable meter from damage by dust and water. Quickly recall calibration data and information with a single touch. Connection of an ORP or temperature electrode adds additional functionality. One-year warranty.

Complete unit includes: 300 Meter, IP54 sets, electrode clip, wrist strap and 4 AAA batteries (electrode not included).

Item NumberItem DescriptionPQPriceQty AvailQuantity
pH Meter, Digital, Portable
  ✱ Chemistry Equipment and Hardware Product line
Measurement Range0.00 – 14.00 pH;
-1999 – 1999 mV;
0 – 100 °C
Measurement Resolution0.01 pH;
1 mV;
0.1 °C
Calibration3 Point
Accuracy ± (mV)1 mV
Temperature CompensationAutomatic
Working Environment5°C – 40°C, 80%RH, non-condensing
Working Environment 41°F – 104°F, 80%RH, non-condensing
Net Weight 0.16 kg (0.35 lb)
Resolution (Voltage)1 mV
pH measuring range0 – 14
pH resolution0.01
Measurement Range (Voltage)-1,999 mV – 1,999 mV
ParameterpH / ORP
Temperature resolution0.1 °C
Measurement Range (Temperature) 0 °C – 100 °C
ElectrodeNot included
Accuracy±0.01 pH;
±1 mV;
±0.5 °C
Power4 AAA (LR03) Batteries (Included)
In-use coverNo
Accuracy ± (Temperature)0.5 °C
Battery Life500 Hours with Disposable Batteries
Temperature Sensor30 KΩ NTC
Dimensions (Width) 90.0 mm (3.54 in)
pH accuracy (±)0.01
Dimensions (Height) 33.0 mm (1.38 in)
Dimensions (Length) 170.0 mm (6.69 in)