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HOBO MX2301A - Temperature/RH Bluetooth Data Logger

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The HOBO MX2301A is a weatherproof data logger with built-in temperature and relative humidity sensors. Leveraging Bluetooth Low Energy, the logger enables easy, fast set up and data download directly from your mobile device

Part Number: MX2301A

Recommended Accessories for Outdoor Use:

M-RSA - Large Assembled Solar Radiation Shield [+$417.00 per item]
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MX2300-RS-BRACKET - Bracket for mounting Logger inside Solar Shield [+$37.00 per item]
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$418.00 ex GST

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Overview
Specifications
Outdoor Use
HOBOconnect

Monitor and share temperature/RH readings anywhere in seconds

The HOBO MX2301 is a weatherproof data logger with built-in temperature and relative humidity sensors. Leveraging Bluetooth Low Energy, the logger enables easy, fast setup and data download directly from your mobile device with Onset's free HOBOconnect app. The MX2301 provides high-accuracy measurements in harsh outdoor environments.

Highlighted Features

Convenient wireless setup and download via Bluetooth Low Energy (100-foot range)
Retrieve data in hard-to-reach locations
Visual alarms alert you to out-of-range conditions
Compact, weatherproof housing with built-in mounting
View current data in real time with Onset’s free HOBOconnect app
Share downloaded data easily from your mobile device
Accuracy: +/- 0.2C° and +/- 2.5% RH

Important:

The HOBO MX2300 data loggers require the HOBOconnect App and a compatible mobile device. The system requirements for the HOBOconnect app can be found at the bottom of our HOBOconnect software page.

Technical Information
Temperature Sensor
Range	MX2301A and MX2305 internal sensors: -40 to 70°C (-40 to 158°F) MX2302A external temperature sensor: -40 to 70°C (-40 to 158°F) MX2303 and MX2304 external sensors: -40 to 100°C (-40 to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year
Accuracy	±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F) ±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F) ±0.25°C from 70 to 100°C (±0.45 from 158 to 212°F), MX2303 and MX2304 only
Resolution	MX2301A and MX2302A: 0.02°C (0.036°F) MX2303, MX2304, and MX2305: 0.04°C (0.072°F)
Drift	<0.01°C (0.018°F) per year
Relative Humidity Sensor* (MX2301A, MX2302A only)
Range	0 to 100% RH, -40° to 70°C (-40° to 158°F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
Accuracy	±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
Resolution	0.01%
Drift	<1% per year typical
Response Time (typical, to 90% of change)
Temperature	Without Solar Radiation Shield	With RS1/M-RSA Solar Radiation Shield	With RS3-B Solar Radiation Shield
MX2301A internal sensor	17 minutes in air moving 1 m/sec	24 minutes in air moving 1 m/sec	NA
MX2302A external sensor	3 minutes, 45 seconds in air moving 1 m/sec	7 minutes, 45 seconds in air moving 1 m/sec	6 minutes, 30 seconds in air moving 1 m/sec
MX2303/MX2304 external sensors	3 minutes in air moving 1 m/sec; 20 seconds in stirred water	7 minutes in air moving 1 m/sec	4 minutes in air moving 1 m/sec
MX2305 internal sensor	17 minutes in air moving 1 m/sec	24 minutes in air moving 1 m/sec	NA
RH	Without Solar Radiation Shield	With RS1/M-RSA Solar Radiation Shield	With RS3-B Solar Radiation Shield
MX2301A internal sensor	30 seconds in air moving 1 m/sec	40 seconds in air moving 1 m/sec	NA
MX2302A external sensor	15 seconds in air moving 1 m/sec	30 seconds in air moving 1 m/sec	30 seconds in air moving 1 m/sec
Logger
Operating Range	-40° to 70°C (-40° to 158°F)
Radio Power	1 mW (0 dBm)
Transmission Range	Approximately 30.5 m (100 ft) line-of-sight
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 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	2/3 AA 3.6 Volt lithium, user replaceable
Battery Life	2 years, typical with logging interval of 1 minute and Bluetooth Always On enabled; 5 years, typical with logging interval of 1 minute and Bluetooth Always On disabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.
Memory	MX2301A and MX2302A: 128 KB (63,488 measurements, maximum) MX2303, MX2304, and MX2305: 128 KB (84,650 measurements, maximum)
Full Memory Download Time	Approximately 60 seconds; may take longer the further the device is from the logger
Dimensions	Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.) External temperature sensor diameter: 0.53 cm (0.21 in.) External temperature/RH sensor diameter: 1.17 cm (0.46 in.) External sensor cable length: 2 m (6.56 ft) Solar radiation shield bracket: 10.8 x 8.3 cm (4.25 X 3.25 in.)
Weight	Logger: 75.5 g (2.66 oz) Solar radiation shield bracket: 20.4 g (0.72 oz)
Materials	Acetal, silicone gasket, stainless steel screws
Environmental Rating	NEMA 6 and IP67
CE	The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

*Per RH sensor manufacturer data sheet

The solar radiation shield is recommended for temperature and relative humidity measurement accuracy in locations exposed to direct or reflected solar radiation.

Mounts on tripods, masts, or flat vertical surfaces. The RS1 is ideal for use with loggers such as the HOBO MX2300, HOBO Pendant and U-Series data loggers. The following loggers require mounting brackets for use with the RS1:

HOBO MX2301 or MX2305 loggers require the MX2300-RS-BRACKET
HOBO U22 or U23-001 loggers require the U23 Clamp Kit

With the addition of a MX2300-RS-BRACKET for mounting the logger inside the solar radiation shield, you have a fully encapsulated Temp/RH Data logging system, ideal for small farming applications or microclimate monitoring.

Mounting the MX2301 into the RS1 Radiation Shield

Shield Specifications

Height: 152 mm (6.0 inches); 165 mm (6.5 inches) with bracket

Width: 210 mm (8.3 inches)

Depth: 187 mm (7.4 inches); bracket protrudes an additional 44 mm (1.8 inches) from shield

Mounting: includes 1.5” u-bolts for mast mounting, or mount on a flat surface with user-supplied screws

Bracket Specifications

Dimensions: 10.8 x 8.3 cm (4.25 X 3.25 in.)

Weight: 20.4 g (0.72 oz)

Download the free HOBOconnect app for your iOS or Android mobile device or Windows computer today.

Onset's HOBOconnect app, accessed from a free download from the iTunes or Google Play app store, or your pc, makes it quick and easy to configure compatible MX Series data loggers (chart below) and manage the collected data. From your mobile device, tablet, or Windows computer, users can view data in graphs, check the operational status of loggers, share data files and graph images for analysis in Excel, Numbers, and other applications, and store data in the cloud. HOBOconnect also makes it fast and easy to set up audible alarm notifications so users are immediately notified of problems.

For documentation on the app, click here >>

Learn more about HOBOconnect >>

Monitor and share temperature/RH readings anywhere in seconds

Highlighted Features

Convenient wireless setup and download via Bluetooth Low Energy (100-foot range)
Retrieve data in hard-to-reach locations
Visual alarms alert you to out-of-range conditions
Compact, weatherproof housing with built-in mounting
View current data in real time with Onset’s free HOBOconnect app
Share downloaded data easily from your mobile device
Accuracy: +/- 0.2C° and +/- 2.5% RH

Important:

The HOBO MX2300 data loggers require the HOBOconnect App and a compatible mobile device. The system requirements for the HOBOconnect app can be found at the bottom of our HOBOconnect software page.