HOBO MX2501 Bluetooth pH & Temperature Data Logger
The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in bodies of water including: estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOconnect app on iOS devices making logger setup, calibration, and data offload quick and easy.
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The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in bodies of water including: estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOconnect app, making logger setup, calibration, and data offload quick and easy.
A guided pH calibration process on the free HOBOconnect app makes an otherwise complicated process easier to follow. Also view data in graphs, check the operational status of loggers, share data files and graph images, and store data in the cloud. Available for iOS devices from the App Store and for Android from the Google Play store.
This affordable and compact logger dramatically cuts the time and effort needed to collect field data, while also offering higher data resolution.
Key Features
- Rugged PVC housing for deployment in both freshwater and saltwater environments
- Quick and easy data offload via Bluetooth Low Energy (BLE) to iOS devices (Android coming soon)!
- Water detection system for longer battery life and less maintenance
- Potentiometric pH electrode with plastic body, gel electrolyte, and double cloth junction
- User-replaceable battery, pH electrode, and anti-biofouling copper guard
- Accuracy of ±0.10 pH units within ±10°C of temperature at calibration.
NOTE: pH electrodes should always be stored in storage solution when not deployed.
Country of Manufacture | United States |
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Explanation | pH SensorRange 2.00 to 12.00 pH, -512 to 512 mV Accuracy ±0.10 pH units within ±10°C of temperature at calibration, ±0.20 mV Resolution 0.01 pH, 0.02 mV Response Time 1 minute typical to 90% at constant temperature in stirred water
Temperature SensorRange -2° to 50°C (28.4° to 122°F) Accuracy ±0.2°C (±0.36°F) Resolution 0.024°C at 25°C (0.04°F at 77°F) Response Time 7 minutes typical to 90% in stirred water
LoggerOperating Range -2° to 50°C (28.4° to 122°F) — non-freezing Buoyancy Fresh water: 13.6 g (0.48 oz) negative / Salt water: 19.6 g (0.69 oz) negative Waterproof To 40 m (131.2 ft) 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). Radio Power 1 mW (0 dBm) Transmission Range Approximately 30.5 m (100 ft) line-of-sight in air Wireless Data Standard Bluetooth Low Energy (Bluetooth Smart) Logging Rate 1 second to 18 hours Logging Modes Fixed interval (normal, statistics) or burst Memory Modes Wrap when full or stop when full 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 Time Accuracy ±1 minute per month 0° to 50°C (32° to 122°F) Battery Type One AA 1.5 Volt, user-replaceable Battery Life 1 year typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always On selected in software. 2 years typical at 25°C (77°F) with 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. Memory 152 KB (43,300 measurements, maximum) Full Memory Download Time Approximately 60 seconds; may take longer the farther the mobile device is from the logger Dimensions 22.86 x 4.27 cm (9.0 x 1.68 inches) Weight 268.2 g (9.46 oz) 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 Environmental Rating IP68 CE Compliant The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
Brand | Onset HOBO |
Maximum Temperature | 50°C |
Tolerance | 0.024°C at 25°C |
Typical applications | Datalogging, Environmental (Outdoor), Field Research, Water Quality |
Measurements | pH, Temperature |
Standard delivery (Royal Mail) - £3.95 to £4.99
Available for purchases under £100. Your order should be with you within 4-5 working days.
Tracked delivery - £5.95 to £6.50
Our tracked delivery is either Royal Mail tracked, Parcelforce or UPS. Your order should be with you within 1-2 working days.
Next Day service - £9.95
Place your order before 2:30pm Monday - Friday and receive your order the next working day (excludes Saturdays, Sundays and Public holidays). Orders placed at the weekend are shipped on the next working day and usually arrive the following day. Goods shipped on a next working day service may be subject to delays by the courier which are outside of our control. Services to outlying areas may differ and take longer and enhanced services may not be available.
International delivery is available for this product. The cost and delivery time depend on country.
Collection
You can collect from our showroom. Please call before visiting to ensure we have your order ready.