Onset HOBO Multi-Channel Data Loggers
Features
- External analog input for a variety of additional sensors
- Optional self-describing sensors with automatic configuration
- Connect via Bluetooth within 100 feet
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Onset HOBO MX Analog/Temp/RH/Light (MX1104) and HOBO MX 4-Channel Analog (MX1105) data loggers measure and transmit data wirelessly from indoor environments to a mobile device or computer using Bluetooth Low Energy technology.
Mechanics
The MX1104 model has integrated temperature, relative humidity (RH), and light intensity sensors and one analog input, while the MX1105 model has four analog inputs. Both models support a wide variety of external sensors (sold separately), including self-describing temperature, split-core AC current transformer, 4-20 mA input, and DC voltage input sensors.
Design
The self-describing sensors are designed with integrated strain relief for a secure connection to the loggers and are automatically detected by the HOBOconnect app for easy setup. These compact loggers also have built-in LCD screens to display current sensor readings, logging status, battery use, memory consumption, and more.
Data Retrieval
Using the app, users can configure the loggers, read out and view data, and export the data for further analysis. The loggers can calculate minimum, maximum, average, and standard deviation statistics and can also be configured to trip audible or visual alarms at thresholds users specify. In addition, both loggers support burst logging, in which data is logged at a different interval when sensor readings are above or below certain limits.
| Temperature Sensor (MX1104) | |||||
| Range | -20° to 70°C (-4° to 158°F) | ||||
| Accuracy | ±0.20°C from 0° to 50°C (±0.36°F from 32° to 122°F) | ||||
| Resolution | 0.002°C at 25°C (0.004°F at 77°F) | ||||
| Drift | <0.1°C (0.18°F) per year | ||||
| RH Sensor* (MX1104) | |||||
| Range | 0% to 100% at -20° to 70°C (-4° to 158°F); exposure to conditions above 95% 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% and above 90% ±5% typical | ||||
| Resolution | 0.01% | ||||
| Drift | <1% per year typical | ||||
| Response Time (MX1104) | |||||
| Temperature | 11 minutes in air moving 1 m/s (2.2 mph) | ||||
| RH | 30 seconds to 90% in airflow of 1 m/s (2.2 mph) | ||||
| Light Sensor (M1104) | |||||
| Range | 0 to 167,731 lux (15,582 lum/ft2) | ||||
| Accuracy | ±10% typical for direct sunlight (see Light Measurement on page 4 for more details) | ||||
| Logger with Cable Type |
SD-MA-420 or CABLE-4-20mA | SD-VOLT-2.5 or CABLE-2.5-STEREO | SD-VOLT-05 or CABLE- ADAP5 |
SD-VOLT-10 or CABLE-ADAP10 | SD-VOLT-24 or CABLE-ADAP24 |
| Measurement Range | 0 to 20.1 mA | 0 to 2.5 V | 0 to 5.0 V | 0 to 10 V | 0 to 24 V |
| Accuracy | ±0.001 mA ±0.2% of reading | ±0.1 mV ±0.1% of reading | ±0.2 mV ±0.3% of reading | ±0.4 mV ±0.3% of reading | ±1.0 mV ±0.3% of reading |
| Resolution | 0.3 µA | 40 µV | 80 µV | 160 µV | 384 µV |
| Logger | |||||
| Operating Range | -20° to 70°C (-4° 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 | ||||
| Restart Mode | Push button | ||||
| Time Accuracy | ±1 minute per month at 25°C (77°F) | ||||
| Battery Type | Two AAA 1.5 V alkaline batteries, user replaceable | ||||
| Battery Life | 1 year, typical with logging interval of 1 minute and Bluetooth Always On enabled; 2 years, typical with logging interval of 1 minute and Bluetooth Always On disabled; and temperatures between 0° and 50°C (32° and 122°F). Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life. | ||||
| Memory | 4 MB (1.9 million measurements, maximum) | ||||
| Full Memory Download Time | Approximately 4 to 15 minutes depending on the mobile device; may take longer the further the device is from the logger | ||||
| LCD | LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range | ||||
| Size | 11.28 x 5.41 x 2.92 cm (4.44 x 2.13 x 1.15 in.) | ||||
| Weight | 123 g (4.34 oz) | ||||
| Environmental Rating | IP54 | ||||
Select Options
In The News
Sustainable Fishing in Alaska: Protecting the Salmon Capital of the World through Research
In the far north, the Alaska Peninsula stretches away from the Last Frontier into the Pacific Ocean. A narrow strip of land dotted with freshwater lakes and intruded upon by ocean inlets–this unique region is intimately connected with the surrounding water. Nestled halfway down the peninsula's southern coast are the small villages of Chignik. The area has historically been home to the Aleut people and has been heavily reliant on fishing for centuries. Home to commercial and subsistence fishing today, Chignik continues to rely upon the salmon returns to the surrounding villages, which are supported by scientists working tirelessly to understand and steward these fish populations.
Read More
NexSens X3 Data Logger Review
Extreme environments meet extreme design with the NexSens X3 Data Logger . The new logger offers the latest in real-time monitoring technology with wireless communication, a large plug-and-play sensor library and ultra-low power consumption, all in a waterproof marine-grade housing. The X3 is built to handle harsh weather, floods, high winds and rough seas, and it stands alone; no additional protective housing needed. With an operating temperature that ranges from -40°C to 70°C, the logger can withstand arctic environments and extreme heat. A conformal coating on the internal circuit board isolates it from moisture and humidity.
Read More
Buoy-Based Solutions: Strengthening Kentucky’s Emergency Response Efforts
When Kentucky’s Emergency Response Team (ERT) has to act quickly in response to chemical and oil spills in the Commonwealth, they rely on small, easily deployable buoys to collect critical data that help minimize and evaluate damages in environmental emergencies. With a background in geology, Robert Blair primarily worked with groundwater and got involved sporadically with the ERT during groundwater contamination emergencies. Over time, this involvement led to him joining the ERT as an On-Scene Coordinator and then becoming the branch manager for the team and overall Emergency Response Branch .
Read More
