Bluetooth Temperature & pH Data Logger
The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy® (BLE) technology, the MX250..
- Brands ONSET
- Product Code: MX2501
- Availability: 7-10 Days
Bluetooth Low Energy Temperature & pH Data Logger
The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy® (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOmobile® app on iOS and Android devices making logger setup, calibration, and data offload quick and easy. A guided pH calibration process on the HOBOmobile app makes an otherwise complicated process easier to follow.
This affordable and compact logger dramatically cuts the time and effort needed to collect field data, while also offering higher resolution data.
NOTE: pH electrodes should always be stored in a storage solution when not deployed.
- Guided pH calibration following on-screen prompts in HOBOmobile app
- Rugged PVC housing for deployment in both freshwater and saltwater environments
- Quick and easy data offload via Bluetooth Low Energy (BLE) to iOS and Android devices
- A water detection system for longer battery life and less maintenance
- Potentiometric pH electrode with a plastic body, gel electrolyte, and double cloth junction
- User-replaceable battery, pH electrode, and anti-biofouling copper guard
- The accuracy of ±0.10 pH units within ±10°C of temperature at calibration
In what environment does this data logger operate?
This data logger operates in an underwater environment.
What measurements does this data logger support?
The MX2501 data logger supports the following measurements: pH and Water Temperature
For more information visit Onset
- MX2501 pH and Temperature Data Logger
- pH electrode
- Bottle of storage solution that can also be used as a storage container for the electrode
- Anti-biofouling copper guard
- Tube of silicone grease
- AA battery
|Full Memory Download Time||Approximately 60 seconds; may take longer the farther the mobile device is from the logger|
|Logger Battery Life||1 year typical at 25°C (77°F) with a logging interval of 1 minute and Bluetooth Always On selected in software. 2 years typical at 25°C (77°F) with a logging interval of 1 minute and Bluetooth Off Water Detect enabled in software. 3 years typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off selected in software. Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.|
|Logger Battery Type||One AA 1.5 Volt, user-replaceable|
|Logger CE||The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).|
|Logger Dimensions||22.86 x 4.27 cm (9.0 x 1.68 inches)|
|Logger Environmental Rating||IP68|
|Logger Memory||152 KB (43,300 measurements, maximum)|
|Logger Operating Range||-2° to 50°C (28.4° to 122°F) — non-freezing|
|Logger Radio Power||1 mW (0 dBm)|
|Logger Time Accuracy||±1 minute per month 0° to 50°C (32° to 122°F)|
|Logger Transmission Range||Approximately 30.5 m (100 ft) line-of-sight in air|
|Logger Waterproofing||To 40 m (131.2 ft)|
|Logger Weight||268.2 g (9.46 oz)|
|Logger Wetted Materials||Logger: PVC housing and sensor end cap, polycarbonate closure caps and mounting end cap with a TPE switch pH electrode: plastic-bodied with Pellon® junctions and gel electrolyte, glass pH sensor bulb|
|Logger Wireless Data Standard||Bluetooth Low Energy (Bluetooth Smart)|
|Logging Modes||Fixed interval (normal, statistics) or burst|
|Logging Rate||1 second to 18 hours|
|Memory Modes||Wrap when full or stop when full|
|pH Electrode Typical Minimum Life||6 months in a sample with ionic strength ≥ 100 µS/cm|
|Start Modes||Immediate, push button, date & time, or next interval|
|Stop Modes||When memory is full, push button, date & time, or after a set logging period|
|Water Detection||Water conductivity level of 100 µS/cm or greater is necessary for reliable detection of water. Deionized water or water below 100 µS/cm may not be detected. The water conductivity circuit may not reliably detect water that has frozen around the electrodes, i.e. below 0°C (32°F).|
|pH Sensor Accuracy||±0.10 pH units within ±10°C of temperature at calibration|
|pH Sensor Range||2.00 to 12.00 pH|
|pH Sensor Resolution||0.01 pH|
|pH Sensor Response Time||1 minute typical to 90% at a constant temperature in stirred water|
|Sample Ionic Strength||≥ 100 µS/cm|
|Temperature Sensor Accuracy||±0.2°C (±0.36°F)|
|Temperature Sensor Range||-2° to 50°C (28.4° to 122°F)|
|Temperature Sensor Resolution||0.024°C at 25°C (0.04°F at 77°F)|
|Temperature Sensor Response Time||7 minutes typical to 90% in stirred water|