| 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 |
