Onset
Waterproof Temp Data Logger
A waterproof logger that uses the power of Bluetooth to deliver accurate temperature measurements straight to your mobile device or Windows computer running Onset's free HOBOconnect app. Designed for durability, this compact logger is ideal for measuring temperature in streams, lakes, oceans, and soil environments. Data collection in the field has never been easier!
Add the MX Gateway for remote access to your data in Onset's cloud-based HOBOlink software (indoor deployments).
Mounting the logger correctly is crucial to ensure that its housing remains undistorted. For mounting on non-flat surfaces, such as rebar or buoy lines, it's recommended to use the provided Mounting Boot (BOOT-MX2201-2202). This boot not only ensures the logger's integrity but also facilitates easy removal for servicing. Additional mounting boots can be acquired as necessary.
Documentation
Quick Start GuideUser Manual
Highlighted Features
- Convenient wireless setup and download via Bluetooth
- Mounting boot included
- Large memory stores 96,000 measurements
- Waterproof to 30 meters (100 feet)
- User-replaceable battery
- Mounting tabs for fast, easy deployment
- LED indicates when temperature exceeds set threshold
- Works with Onset’s free HOBOconnect app
- ±0.5°C (±0.9°F) accuracy
Specifications
| Specification | Value (MX2201 and MX2202 unless specified) |
|---|---|
| Temperature Sensor | |
| Range (in air) | -20° to 70°C (-4° to 158°F) |
| Range (in water) | -20° to 50°C (-4° to 122°F) |
| Accuracy | ±0.5°C from -20° to 70°C (±0.9°F from -4° to 158°F) |
| Resolution | 0.04°C (0.072°F) |
| Drift | <0.1°C per year (0.18°F per year) |
| Response Time (air, unmounted) | 17 minutes typical to 90% in air moving 1 m/s |
| Response Time (stirred water, unmounted) | 7 minutes typical to 90% |
| Light Sensor (MX2202) | |
| Range | 0 to 167,731 lux (0 to 15,582 lum/ft^2) |
| Accuracy | ±10% typical for direct sunlight (see Light Measurement on page 2 for details) |
| Logger | |
| Logger Operating Range (in air) | -20° to 70°C (-4° to 158°F) |
| Buoyancy (Fresh Water) | 2 g positive (0.07 oz positive) |
| Waterproof | To 30.5 m (To 100 ft) |
| Radio Power | 1 mW (0 dBm) |
| Transmission Range | Approximately 30.5 m line-of-sight (Approximately 100 ft line-of-sight) |
| Wireless Data Standard | Bluetooth Low Energy (Bluetooth Smart) |
| Logging Rate | 1 second to 18 hours |
| Time Accuracy | ±1 minute per month at 25°C (77°F) |
| Battery | CR2032 3V lithium, user replaceable |
| Battery Life | 1 to 2 years typically at 25°C (77°F) depending on settings and use (see description above) |
| Memory | 96,000 measurements |
| Full Memory Download Time | Approximately 45 seconds (distance may affect time) |
| Wetted Materials | Polypropylene case, EPDM O-ring |
| Dimensions | 3.35 x 5.64 x 1.8 cm (1.32 x 2.22 x 0.69 inches) |
| Weight | 12.75 g (0.45 oz) |
| Environmental Rating | IP68 |
Applications
In what environment does this data logger operate?
This data logger operates in indoor, outdoor, and underwater environments.
What measurements does this data logger support?
The MX2201 data logger supports the following measurements: Temperature and Water Temperature