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From well drawdown tests to monitoring well level, liquid level data loggers are proven to be valuable tools for many applications. Low-cost versions have emerged that are designed for cost-effective monitoring. However, these devices have technological limitations that may limit their lifespan and increase the overall system cost.
Traditionally, internal lithium batteries have powered low-cost level loggers. With this technology, the battery life may be limited to five years, depending on the logging rate. Once the battery is depleted, the level logger can be rendered inoperable because the battery is not replaceable. Though some may be powered from the surface after the battery has expired, the application versatility is limited. Additionally, older battery technologies are not suitable for use in devices that require long-term deployment, as older rechargeable batteries self-discharge at a slow rate even when the device is not
Technological advances can alleviate these limitations and make these devices more effective. Rechargeable technology known as accumulator power cells provide an alternative to lithium batteries, as they are rechargeable and do not self-discharge. The power cell is charged via USB connection during data retrieval at a rate of approximately 100 mAh. An AC power adapter also may be provided to facilitate faster charging of the power cell at a rate of approximately 800 mAh.
The DCX-18 ECO utilizes accumulator power cell technology to create a low-cost data logger that has an indefinite lifespan. With a fully charged power cell, the device can operate for up to three years, depending on logging rates. The solid state memory stores up to 57,000 measurements and can be programmed to record at specified intervals as fast as one measurement per second.
Programming and data retrieval is improved by the software, which is available for download free of charge to provide a lower system price. The data logger is available in pressure ranges up to 100 meters of water and can be built in absolute, sealed and vented versions to ensure versatility as applications change.
The result is a level monitoring system that simplifies installation and testing with accuracy and versatility.