CS470

The CS470 is a compact bubbler that generally measures ground or surface water level, but can also measure any liquid level. This bubbler has an accuracy of ±0.02 ft. A Campbell Scientific data logger controls the CS470 pump and calculates the measurements. The bubbler typically communicates with the data logger via the SDI-12 protocol. Many of our data loggers support SDI-12.

The CS470 contains a piston pump that compresses air. The compressed air flows through a measuring tube into the water being measured. The pressure created in the measuring tube is directly proportional to the water column above a bubble chamber. The CS470 measures both barometric pressure and bubble pressure, one after the other. The height of the water above the bubble chamber is then calculated by taking the difference between the barometric and bubble pressure measurements.

To use the CS470, the acquisition system must include the measuring tube, a bubble chamber, power supply, data logger, and data-logger-connection cable. Campbell Scientific offers the measuring tube, bubble chamber, and cable as Common Accessories. (See the Ordering Info on the web page.) The CS470, data logger, and power supply must be housed in a desiccated environment, typically a Campbell Scientific enclosure. Hardware for mounting the CS470 to an enclosure backplate is shipped with the sensor.

The CS470 can communicate via SDI-12, 4 - 20 mA, or RS-485 (SDI-12 protocol via a physical RS-485 interface). SDI-12 is the preferred protocol when using Campbell Scientific data loggers. Many of our data loggers support SDI-12.