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NEW HOBO MX2300 Series Loggers
Bluetooth (BLE) Weatherproof loggers for outdoor temperature and humidity measurements
With Onset’s new HOBO MX2300 Series Temp/ RH loggers, field data collection has never been easier. You can set up and offload loggers wirelessly from your mobile device – eliminating the need to take a laptop or data shuttle into the field to retrieve data.
Key Advantages:
• Weatherproof housing for use in outdoor or condensing environments
• High-accuracy measurements
• RH sensor provides superior recovery from condensing conditions
• Small-diameter, external sensor versions for measurements in tight spaces
• Wireless setup & download with Bluetooth Low Energy (BLE)
Choice of Models The HOBO MX2300 Series offers five models covering a broad range of outdoor monitoring applications, from agricultural research to forest ecology studies. The series includes internal sensor models that are highly durable and easy to deploy, and external probe models that are well-suited for monitoring conditions in soils, water, walls, and more.
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Temperature Sensor |
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Range |
MX2301 and MX2305 internal sensors: -40 to 70°C (-40 to 158°F) |
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Accuracy |
±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F) |
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Resolution |
0.04°C (0.072°F) |
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Drift |
<0.01°C (0.018°F) per year |
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RH Sensor (MX2301, MX2302 only) |
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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% |
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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 |
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Resolution |
0.05% |
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Drift |
<1% per year typical |
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Response Time Temperature |
Without Solar Radiation Shield |
With RS1/M-RSA Solar Radiation Shield |
With RS3-B Solar Radiation Shield |
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MX2301 internal sensor |
17 minutes in air moving 1 m/sec |
24 minutes in air moving 1 m/sec |
N/A |
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MX2302 external sensor |
2 minutes, 30 seconds in air moving 1 m/sec |
6 minutes in air moving 1 m/sec |
5 minutes in air moving 1 m/sec |
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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 |
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MX2305 internal sensor |
17 minutes in air moving 1 m/sec |
24 minutes in air moving 1 m/sec |
N/A |
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Response Time RH |
Without Solar Radiation Shield |
With RS1/M-RSA Solar Radiation Shield |
With RS3-B Solar Radiation Shield |
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MX2301 internal sensor |
1 minute in air moving 1 m/sec |
1 minute in air moving 1 m/sec |
N/A |
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MX2302 external sensor |
4 minutes in air moving 1 m/sec |
4 minutes in air moving 1 m/sec |
4 minutes in air moving 1 m/sec |
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Logger |
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Radio Power |
1 mW (0 dBm) |
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Transmission Range |
Approximately 30.5 m (100 ft) line-of-sight |
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Wireless Data Standard |
Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0) |
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Logger Operating Range |
-40° to 70°C (-40° to 158°F) |
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Logging Rate |
1 second to 18 hours |
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Logging Modes |
Fixed interval (normal, statistics) or burst |
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Memory Modes |
Wrap when full or stop when full |
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Start Modes |
Immediate, push button, date & time, or next interval |
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Stop Modes |
When memory full, push button, date & time, or after a set logging period |
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Time Accuracy |
±1 minute per month 0° to 50°C (32° to 122°F) |
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Battery Type |
2/3 AA 3.6 Volt lithium, user replaceable |
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Battery Life |
2 years, typical with logging interval of 1 minute and Power Saving Mode disabled; 5 years, typical with logging interval of 1 minute and Power Saving Mode enabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life. |
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Memory |
128 KB (84,650 measurements, maximum) |
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Full Memory Download Time |
Approximately 60 seconds; may take longer the further the device is from the logger |
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Dimensions |
Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.) |
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Weight |
Logger: 75.5 g (2.66 oz) Solar radiation shield bracket: 20.4 g (0.72 oz) |
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Materials |
Acetal, silicone gasket, stainless steel screws |
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Environmental Rating |
NEMA 6 and IP67 |
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules
