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Onset HOBO® MX2501 Outdoor Bluetooth pH and Temperature Data Logger Specifications
| Data Channels | 1 Humdity Channel 1 Temperature Channel |
| pH | Measurement Range: 2.0 to 12.0 pH (-512 to 512mV) Accuracy: ±0.10 pH (±20 mV) units within ±10°C of Temperature at Calibration Response Time: 1 Minute Typical to 90% at Constant Temperature in Stirred Water Resolution: 0.01 pH (0.02 mV) |
| Temperature | Measurement Range: -2°C to 50°C (28.4°F to 122°F) Accuracy: ±0.2°C (±0.36°F) Response Time: 7 Minutes Typical to 90% in Stirred Water Resolution: 0.024°C at 25°C (0.04°F at 77°F) |
| pH Electorde Life | 6 Months |
| Bouyancy | Fresh Water:13.6g (0.48 oz) Negative Salt Water:19.6g (0.69 oz) Negative |
| Waterproof | Up to 40 Meters |
| Water Detection | Water Conductivity Level to 10 S/cm or Greater is Necessary for Reliable Detection of Water. Deionized Water or Water Below 100 S/cm May Not Be Detected. The Water Conductivity Circuit May Not Reliably Detect Water that Has Frozen Around the Electrodes. |
| Data Storage Capacity | 43,300 Readings (When Bluetooth Communications Not Available) |
| Logging Mode | Fixed Interval (Normal, Statistics) or Burst |
| Memory Mode | Wrap when Full or Stop When Full |
| Start Modes | Immediately, Push Button, Date & Time or Next Interval |
| Stop Modes | Wrap When Data Storage Full, Push Button, Date & Time or After Set Interval |
| Sampling Rate | 1 Second to 18 Hours (User-Specified) |
| Power Source | AA 1.5 Volt Lithium Battery (User-Replaceable) |
| Battery Life | Bluetooth Always On: 1 Year typical @ 1 Minute Sampling Rate Bluetooth Off, Water Detect Enabled: 2 Years typical @ 1 Minute Sampling Rate Bluetooth Always Off: 3 Years typical @ 1 Minute Sampling Rate Note: Dependant Upon Environment, Operating Range, Logging Interval, Remaining Connected with the App, Excessive Downloads and Paging May Impact Battery Life |
| Time Accuracy | ±1 Minute per Month 0°C to 50°C |
| Communications | Type: Bluetooth Wireless Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0) Transmission Range: Up to 30.5 Meters (100 ft) Line of Sight Radio Power: 1 mW (0 dBm) |
| Software | HOBOmobile 1.7 Software App for iOS and Android Note: Bluetooth 4.0 is Required on your Mobile Device (Phone or Tablet) |
| OS Compatibility | Android Phones and Tablets iPhone, iPad, iPod Touch with iOS 7.1 or Later Bluetooth 4.0 or Later |
| Operating Range | Temperature: -2°C to 50°C (28.4°F to 122°F) - Non-Freezing |
| Standards Compliance | CE, IP68 |
| Environment | Designed for Outdoor and Underwater Usage |
| Materials | Data 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 |
| Weight | 286.2 grams (9.46 oz.) |
| Dimensions | 22.86 cm x 4.27 cm (9.0" x 1.68") |
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