OTT1372

Disposable Digital pH Sensor

Application

An electrochemical pH paper sensor

Target Problems

Currently there are two common ways to measure pH, a pH meter or pH paper:
pH meter: Must be used with care and is difficult to maintain, specifically, they must be calibrated and cleaned before each use. Also, large volumes of liquid must be tested.
pH paper: This method is subjective and semi-quantitative, it lacks the ability to give an exact measurement of a solution, and is only accurate for a quick check of whether a solution is acidic, basic, or neutral.

Key Benefits

More Accurate: Increased pH testing accuracy, to the second decimal, measures a very wide pH range
Easy to Read: Digital readout for easy quick and easy viewing
Portable: Compact handheld electrode for convenient usage
Inexpensive: Single use disposable paper used with multi-use electrode for low cost measurements
Easy to Use: Only a small sample is needed for testing
Minimal Contamination: The patterned paper fluidic channel can minimize contamination

Technology

The hand-held electrochemical reader and screen-printed electrodes can be used as a disposable device or can also be reused several times. The paper test strip for liquid samples is a one-time-use, which serves for sample delivery and storage. This electrochemical pH paper sensor can also be combined with other electrochemical detection technologies for simultaneous multiplex detections such as glucose, heavy metals, etc.