MX2501 pH Data Logger
The new low-cost HOBO® MX2501 pH and Temperature logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. It communicates wirelessly via Bluetooth Low Energy (BLE) to the HOBOmobile® app on your phone or tablet, making logger setup, calibration, and data offload quick and easy, with no need for extra equipment or complicated calibration procedures.
- Data offload to your mobile device via BLE
- Guided pH calibration with the HOBOmobile app
- Rugged PVC design for freshwater or saltwater deployments
- Water detection feature for longer battery life
- User-replaceable battery, pH electrode, and anti-biofouling copper guard
Guided Calibration on your Mobile Device
The HOBOmobile app's built-in guided calibration feature makes an otherwise difficult task a breeze, seamlessly walking you through the pH calibration process.
Simply follow the on-screen prompts and your logger is calibrated!
Rugged Design, Accurate pH Readings!Built to be compact and rugged, the MX2501 logger has a replaceable pH electrode, an anti-biofouling copper guard, and a PVC housing, making it ideal for freshwater or saltwater environments. It also includes a battery-saving water detection feature for extended battery life and less maintenance.
Can I download data from an MX2501 pH logger deployed in water?
No, the logger needs to be removed from the water to download the data.
Does the logger feature a user-replaceable electrode?
What type of pH electrode is used?
Plastic-bodied, double junction electrode with a Pellon® junction and gel reference electrolyte.
Can I calibrate with custom pH buffers?
No. The electrode is calibrated to 2 or 3 points using standard pH buffers (4, 7, and 10).
Is the calibration procedure the same for freshwater and saltwater applications?
The procedure itself is the same; however, some users deploying the loggers in saltwater may want to use a modified version of the pH buffers that includes chemicals (like Tris buffer) to make the hydrogen ion activity in the buffer more similar to its activity in saltwater