ONSET HOBO MX20L MX Water Level Data Logger

The MX20L Water Level Logger brings you all the same great features as the U20L and more!

Integrating Bluetooth for fast and reliable data download, the MX20L logger eliminates the need to plug your logger into a base station or shuttle to offload data in the field, ensuring continuous water level and temperature monitoring. With options to measure at depth ranges of 13, 30, or 100 feet in a wide range of underwater environments, this rugged logger features 0.1% measurement accuracy, a durable polypropylene housing for use in both freshwater and saltwater, and a non-vented design for convenient and reliable deployment.

The MX20L comes with a magnetic activation fob that can "wake up" the logger to activate its Bluetooth communication for configuration and data download. The included fob comes with a lanyard to prevent losing or dropping the fob in the field. You can purchase additional activation fobs HERE.

This logger records absolute pressure, which is later converted to water level readings by our HOBOconnect software. To compensate for barometric pressure changes, you can use another HOBO MX20L Water Level logger as a barometric reference.  See our FAQ section for more information.

Features

• Self-contained, non-vented design enables easy deployment

• Ideal for use in both freshwater and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas

• Depth measurement options of up to 13, 30, or 100 feet depending on model

• Durable ceramic pressure sensor withstands freezing

• Streamlined data offload via Bluetooth to the free HOBOconnect app

• HOBOconnect app provides easy extraction and visulization of water level data

• Extended battery life up to 10 years (power-saving mode requires magnetic fob to activate Bluetooth for data download)

Note: A calibration certificate is not offered for this logger. If you require a NIST-traceable calibration certificate, please see the U20-001-01 (freshwater) or U20-001-01-Ti (saltwater).