ISFET pH probes, 4-electrode conductivity probes and multiparameter options

Everything You Need to Know About ISFET pH Sensors and Meters

The measurement of pH is a crucial aspect of scientific research and various industries such as pharmaceuticals, food and beverage, and water treatment. pH measurement is essential to ensure the quality and safety of these products. Traditional pH sensors use glass electrodes that are fragile, expensive, and require special handling. However, the advancement of technology has led to the development of non-glass pH sensors, such as ISFET pH sensors.

ISFET pH sensors have become increasingly popular due to their durability, accuracy, and affordability. This article will provide an in-depth explanation of ISFET pH sensors, how they work, and their benefits.

What is an ISFET pH sensor?
ISFET stands for Ion-Sensitive Field-Effect Transistor. An ISFET pH sensor is a solid-state device that measures the pH of a solution by detecting the hydrogen ion concentration in the solution. ISFET pH sensors are an alternative to traditional glass electrode pH sensors and are made of silicon-based material. Unlike glass electrode pH sensors, ISFET pH sensors do not contain glass and are not as fragile.

How do ISFET pH sensors work?
ISFET pH sensors work by measuring the voltage generated when hydrogen ions in the solution interact with the gate of the transistor. The gate of the transistor is coated with a thin layer of a sensitive material that reacts to changes in pH. When the gate interacts with the hydrogen ions in the solution, a voltage is generated that is proportional to the pH of the solution.

Benefits of ISFET pH sensors:
ISFET pH sensors offer several benefits over traditional glass electrode pH sensors, including:
Durability: ISFET pH sensors are made of silicon-based material and do not contain glass, making them more durable than glass electrode pH sensors.
Accuracy: ISFET pH sensors provide accurate measurements and are not affected by temperature changes thanks to the automatic temperature compensation.
Easy to Use: ISFET pH sensors are easy to use and do not require special handling like traditional glass electrode pH sensors.
Versatility: ISFET pH sensors can be used in a wide range of applications, including food and beverage, water treatment, and pharmaceuticals.

FAQ