Crafted with all the functions of the HOBO MX2301, Onset’s HOBO MX2302 Temperature and RH Sensor Data Logger is designed with external temperature and relative humidity sensors.
View the rest of the Onset HOBO MX2300 series below.
Specifications
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 (typical, to 90% of change)
Temperature
MX2301 and MX2305 internal sensors: 17 minutes in air moving 1 m/sec MX2302 external sensor: 2 minutes, 30 seconds in air moving 1 m/sec MX2303 and MX2304 external sensors: 3 minutes in air moving 1 m/sec; 20 seconds in stirred water
RH
MX2301: 1 minute in air moving 1 m/sec MX2302: 4 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
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