
HOBO Pendant MX Water Temperature Data Logger
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Overview
A waterproof logger that uses the power of Bluetooth to deliver accurate temperature measurements straight to your mobile device or Windows computer running our free HOBOconnect app. Designed for durability, this compact logger is ideal for measuring temperature in streams, lakes, oceans, and soil environments. Data collection in the field has never been easier!
Purchase an MX Data Plan to get more out of your data and access it from anywhere using the LI-COR Cloud software platform (formerly HOBOlink)!
Mounting Requirements: It is very important that the logger housing does not get distorted when mounted. When mounting these loggers to any non-flat surface, such as rebar or buoy lines, we recommend using the included Mounting Boot (BOOT-MX2201-2202)—also useful for mounting loggers so they can be easily removed for service. Additional mounting boots can be purchased as desired.
Features
- Convenient wireless setup and download via Bluetooth
- Mounting boot included
- Large memory stores 96,000 measurements
- Waterproof to 30 meters (100 feet)
- User-replaceable battery
- Mounting tabs for fast, easy deployment
- LED indicates when temperature exceeds set threshold
- Works with Onset’s free HOBOconnect app
- ±0.5°C (±0.9°F) accuracy
Specifications
Temperature Sensor (MX2201 and MX2202)
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-20° to 70°C in air-4° to 158°F in air-20° to 50°C in water-4° to 122°F in water
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±0.5°C from -20° to 70°C±0.9°F from -4° to 158°F
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0.04°C0.072°F
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<0.1°C per year<0.18°F per year
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17 minutes typical to 90% in air moving 1 m/s, unmounted7 minutes typical to 90% in stirred water, unmounted
Light Sensor (MX2202)
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0 to 167,731 lux0 to 15,582 lum/ft2
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±10% typical for direct sunlight (see Light Measurement on page 2 for more details)
Logger
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-20° to 70°C in air-4° to 158°F in air
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2 g positive0.07 oz positive
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To 30.5 mTo 100 ft
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1 mW0 dBm
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Approximately 30.5 m line-of-sightApproximately 100 ft line-of-sight
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Bluetooth Low Energy (Bluetooth Smart)
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1 second to 18 hours
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±1 minute per month at 25°C±1 minute per month at 77°F
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CR2032 3V lithium, user replaceable
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1 year typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always On enabled in software.2 years typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always On disabled in software.Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.To ensure proper battery installation, see Battery Information for detailed instructions on replacing the battery.
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96,000 measurements
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Approximately 45 seconds; may take longer the farther the device is from the logger
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Polypropylene case, EPDM O-ring
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3.35 x 5.64 x 1.8 cm1.32 x 2.22 x 0.69 inches
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12.75 g0.45 oz
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IP68
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