Part Number - MX2302A

HOBO External Temperature/RH Sensor Data Logger

Bluetooth-enabled logger

$210.00 USD
A weatherproof data logger with external temperature and relative humidity sensors. leveraging Bluetooth for easy setup and data download.

Important Information

Requires a compatible mobile device or Windows computer and the HOBOconnect app. System requirements for the app can be found at the bottom of the HOBOconnect software page. This logger is designed for use with the RS3-B Solar Radiation Shield and is not compatible with the RS3 version.

Compatible with

HOBOconnect

Overview

A weatherproof data logger with external temperature and relative humidity sensors. Leveraging Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running Onset's free HOBOconnect app, this logger delivers high-accuracy measurements in harsh outdoor environments.

 

Features

  • Convenient wireless setup and download via Bluetooth (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
Country of Origin
United States

Specifications

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

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Description: ce

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

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FCC Logo

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Australia/New Zealand General Compliance mark

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Australia/New Zealand General Compliance mark

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South Korea KC Certification for Electrical and Electronic Products

*Per RH sensor manufacturer data sheet

Compatible items

NIST Setup & Certifications

NIST-RH-ONEPOINT
$105.00 USD
NIST-RH-THREEPOINT
$165.00 USD
NIST-TEMP-POINT
$180.00 USD

Solar Radiation Shields

RS3-B
$75.00 USD

Compliance Certificates

COMPLIANCE_CERT
$25.00 USD

Communications

MXGTW1
$375.00 USD

Batteries

HRB-2/3AA
$15.00 USD

What's in the box

  • HOBO MX2302 Ext Temp/RH Data Logger
  • Screws
  • Cable ties

Documents

HOBO® MX2300 Series Data Logger Manual

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Quick Start for the HOBO® MX2300 Series Data Loggers

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MX Data Logger Guide

This guide will walk you through the basic steps of data logging, including setting up your new data logger, downloading and sharing data, and the option to upload your data to the cloud.
View View

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Certification

Initial Purchase RH NIST Calibration Service Certification

Testing and certification of HOBO data logger and sensor RH (relative humidity) accuracy using standards traceable to the U.S. National Institute of Standards & Technology (NIST).
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Certification

NIST Temperature Point Certification

Temperature point certification charge on a per-data logger basis.
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Mounting

Solar Radiation Shield

Use the RS3-B Solar Radiation Shield with HOBO external sensors for improved temperature measurement accuracy in locations exposed to sunlight
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