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Onset Pendant® MX2201 Water Temperature Data Logger

  • Onset Pendant® MX2201 Water Temperature Data Logger
  • Onset Pendant® MX2201 Water Temperature Data Logger
  • Onset Pendant® MX2201 Water Temperature Data Logger
  • Onset Pendant® MX2201 Water Temperature Data Logger

Onset HOBO® Bluetooth Pendant Temperature Data Logger

Part Number: MX2201

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  • Internal Sensors for Temperature Measurements in an Indoor, Outdoor and Underwater Environment

  • Wireless Transmission of Recorded Readings to Phone or Tablet Using Bluetooth Smart LE Communications (in Air)

  • -20°C to 70°C (Air) or -20°C to 70°C (Water) Measurement Ranges with a +/-0.5°C Accuracy

  • Waterproof to 30 Meters (100 ft)

  • User-Replaceable Lithium Battery with 1 Year Typical Life (1 Minute Sampling Rate)

  • Stores up to 96,000 Measured Readings with Date/Time Stamp if Bluetooth Communications Not Available

HOBOmobile App Available on the Apple Store (iOS) and Google Play (Android)

Availability: In stock


All Calibration Orders Have a 5 to 7 Business Day Lead Time
1 Year Calibration Due Date Unless Otherwise Specified


Onset HOBO® MX2201 Pendant Bluetooth Water Temperature Data Logger Specifications

Data Channels 1 Temperature Channel
Temperature Measurement Range (Air): -20°C to 70°C (-4°F to 158°F)
Measurement Range (Water): -20°C to 50°C (-4°F to 122°F)
Accuracy: ±0.5°C at -20°C to 70°C (-4°F to 158°F)
Response Time (Air): 17 Minutes typical to 90% in Air Moving @ 1 m/s (2.2 mph) unmounted
Response Time (Water): 7 Minutes typical to 90% in Stirred Water, unmounted
Resolution: 0.04°C (0.072°F)
Drift: <0.1°C (0.18°F)
Data Storage Capacity 96,000 Temperature Readings (When Bluetooth Communications Not Available or Data Logger in Water)
Buoyancy (Fresh Water) 2g (0.07 oz) positive
Logging Mode Fixed Interval (Normal, Statistics) or Burst
Memory Mode Wrap when Full or Stop When Full
Start Mode Immediately, Push Button, Date & Time or Next Interval
Stop Mode Wrap When Data Storage Full, Push Button, Date & Time or After Set Interval
LED Indicators Alarm: Visual LED
Status: Visual LED
Sampling Rate 1 Second to 18 Hours (User-Specified)
Power Source CR2032 3 Volt Lithium Battery (User-Replaceable)
Battery Life Bluetooth Always Off Disabled in Software: 1 Year typical @ 1 Minute Sampling Rate
Bluetooth Always Off Enabled in Software: 2 Years typical @ 1 Minute Sampling Rate
Note: Dependant Upon Environment, Operating Range, Logging Interval, Remaining Connected with the App, Excessive Downloads and Paging My Impact Battery Life
Time Accuracy ±1 Minute per Month @ 25°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 in Air
Radio Power: 1 mW (0 dBm)
Note: Bluetooth Transmission in Air Only.
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: -20°C to 70°C (-4°F to 158°F)
Standards Compliance CE
Environment Primarily Designed for Outdoor Usage
Wetted Materials Polypropylene Case, EPDM O-Ring
Weight 12.75 grams (0.45 oz.)
Dimensions 3.35 cm x 5.64 cm x 1.60 cm (1.32" x 2.22" x 0.63") - Without Mounting Tabs

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  • Answer:

    This particular line of loggers doesn't provide any remote alert functionality.

    Generally speaking you will need to look at WIFI loggers with a cloud service for this type of functionality.

    Here are some that we offer:

    Lascar WiFi series: Paid cloud service but very easy to use and set up.



    T&D WiFi series: Free cloud service but can be challenging to set up and use.  Not recommended unless you have a strong knowledge of wireless networking/troubleshooting.  These loggers work very well and are very high quality they are just challenging to get connected.  The versions with part numbers ending in WF are WiFi and the ones ending in NW are wired Ethernet (these are easier to use).


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