HOBO MX2303 Two External Temperature Sensors Data Logger

The HOBO MX2303 is a weatherproof data logger with two external temperature sensors.

  • Product Name:Temperature Sensors Data Logger
  • Item No.:MX2303
  • Manufacturers:ONSET
  • Country of Origin:USA

The HOBO MX2303 is a weatherproof data logger with two external temperature sensors. Leveraging Bluetooth Low Energy, the logger enables easy, fast set up and data download directly from your mobile device, and 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 HOBOmobile app

  • Share downloaded data easily from your mobile device

  • Accuracy: +/- 0.2C°


In what environment does this data logger operate?

This data logger operates in an outdoor environment.


What measurements does this data logger support?

The MX2303 data logger supports the following measurement: Temperature


Temperature Sensor

Range:

MX2301 and MX2305 internal sensors: -40 to 70°C (-40 to 158°F)

MX2302 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:0.04°C (0.072°F)

Drift:<0.01°C (0.018°F) per year


RH Sensor (MX2301, MX2302 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:0.05%

Drift:<1% per year typical


Response Time: Temperature (typical, to 90% of change)Without Solar Radiation ShieldWith RS1/M-RSA Solar Radiation ShieldWith RS3-B Solar Radiation Shield
MX2301 internal sensor17 minutes in air moving 1 m/sec24 minutes in air moving 1 m/secN/A
MX2302 external sensor2 minutes, 30 seconds in air moving 1 m/sec6 minutes in air moving 1 m/sec5 minutes in air moving 1 m/sec
MX2303/MX2304 external sensors3 minutes in air moving 1 m/sec; 20 seconds in stirred water7 minutes in air moving 1 m/sec4 minutes in air moving 1 m/sec
MX2305 internal sensor17 minutes in air moving 1 m/sec24 minutes in air moving 1 m/secN/A
Response Time: RH (typical, to 90% of change)Without Solar Radiation ShieldWith RS1/M-RSA Solar Radiation ShieldWith RS3-B Solar Radiation Shield
MX2301 internal sensor1 minute in air moving 1 m/sec1 minute in air moving 1 m/secN/A
MX2302 external sensor4 minutes in air moving 1 m/sec4 minutes in air moving 1 m/sec4 minutes in air moving 1 m/sec

Logger

Radio Power:1 mW (0 dBm)

Transmission Range:Approximately 30.5 m (100 ft) line-of-sight

Wireless Data Standard:Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)

Logger Operating Range:-40° to 70°C (-40° to 158°F)

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 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.

Memory: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 

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.