MX2303 HOBO Two External Temperature Sensor Data Logger

Rango

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

Precisión

±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

Resolución

0.04°C (0.072°F)

Drift

<0.01°C (0.018°F) per year

Sensor Humedad Relativa (sólo MX2301 y MX2302)

Rango

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%

Precisión

±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

Resolución

0.05%

Drift

<1% per year typical

Tiempo de Respuesta (typical, to 90% of change)

Temperatura

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

Humedad Relativa

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