Review on Apera Instruments Benchtop Calibration Electrode by Anthony Cornelius

Surprisingly good pH meter for the money. Although the gel-filled electrode has only one junction, it has a stable response time and is very easy to calibrate. Additional specialty sensors are available including higher quality liquid filled sensors and these are available at a very reasonable price. The screen is easy to read, the calibration procedure is intuitive and the lever, while not articulated, is still very comfortable. Another nice touch is that the grade percentage is displayed after calibration, alerting you in case you've miscalibrated or the sensor is running low. Overall I'm impressed with the value for money and will definitely consider one of their higher research quality units for more serious/professional laboratory use.