SKU: SEN0237-A
Gravity: Analog Dissolved Oxygen Sensor is an open-source, Arduino-compatible kit designed to measure dissolved oxygen levels in water. Featuring a galvanic probe requiring no polarization time, replaceable filling solution and membrane cap for low maintenance, and easy plug-and-play integration, this product is ideal for aquaculture, environmental monitoring, and scientific research.
Downloadable Resources
1. Getting Started
This article explains how to properly prepare a dissolved oxygen probe by filling it with 0.5 mol/L NaOH solution, covering the steps to avoid errors such as bubble formation and ensuring accurate measurements.
2. Example Code for Arduino-Probe Calibration
This article offers example code and comprehensive instructions for calibrating probes to accurately measure dissolved oxygen values. It explains single-point and two-point calibration methods, providing guidance on hardware and software setup. Readers will learn how to achieve precise sensor readings under stable and varying temperature conditions.
3. Example Code for Arduino-Dissolved Oxygen Measurement
This tutorial will show how to use this dissolved oxygen sensor kit. The dissolved oxygen probe is a precision electrochemical sensor. Please pay attention to the usage details.
Reference
The article explores the calibration principles necessary for accurate dissolved oxygen measurement, focusing on the relationship between temperature and saturation voltage, and the need for temperature compensation curves to ensure measurement precision.
FAQ
You can try to use a brush to clean the rust on it and replace the electrolyte inside. The service life of the electrode is about 1 year. After the service life is exceeded, the entire electrode probe needs to be replaced, which cannot be repaired.
1.If the readings of zero dissolved oxygen liquid is not zero or close to zero, you can polish the cathode of the probe.
2.If the readings is not within normal range or the readings drifts, please check the membrane on the cap. holes or contaminations on the membrane, please change the cap.
You need to purchase the NaOH solution first, and add 1~2 drops glycerinum to the NaOH solution for every 100mL. Only by adding the NaOH solution into the probe can it be ready for use.
1.Short time (over night to a week ): dip the probe into purified water or deionized water to prevent the filling solution from evaporating. Disconnect the probe from the main instrument every time when it is not in use.
2.Long time: (over a week): unscrew the cap from the probe and wash the electrodes core (cathode: platinum, anode: lead) and wash the cap with purified water or deionized water. Dry all the components with tissue. Screw the cap back to the probe without adding any filling solution to prevent the anode from being consumed. Put all the components back into the package.
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