A547 Conductivity Interface for CS547(A)
Helps Measure a Water Conductivity Probe
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications


The A547 is an interface that allows your Campbell Scientific data logger to measure a CS547A water conductivity probe. The A547 Conductivity Interface contains the blocking capacitors and bridge completion resistors necessary for the conductivity measurement. One A547 is required for each CS547A when used directly with the data logger; multiple CS547A probes can be used with an AM16/32B multiplexer and one A547.

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Benefits and Features

  • Compatible with AM16/32-series multiplexers, allowing measurement of multiple sensors


Detailed Description

The A547 interface consists of blocking capacitors and bridge completion resistors housed in a metal case. Screw terminals are provided for connecting the data logger, and a water conductivity probe or multiplexer.


Operating Temperature -15° to +50°C
  • 6.4 x 4.6 x 2.3 cm (2.5 x 1.8 x 0.9 in.)
  • 8.9 x 4.6 x 2.3 cm (3.5 x 1.8 x 0.9 in.) with mounts
Weight 45 g (2 oz)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)
CR9000X (retired)


Product Compatible Note
CS547-L (retired)

Additional Compatibility Information

Data Logger Considerations

Measurement of the CS547(A) via the A547 requires two excitation channels, a differential input for the conductivity measurement, and a single-ended input for the temperature measurement.


The A547 is compatible with AM16/32-series multiplexers. When a multiplexer is used, the sensors connect to the COM terminals of the multiplexer and the multiplexer connects to the sensor terminals of the A547.


Data Logger-to-A547

A six-conductor cable, three feet in length, is provided with each A547 purchase for connecting it to the data logger.


In single-sensor applications, the sensor leads connect directly to the A547's terminal strips. In applications with multiple sensors, most customers multiplex the sensors through a multiplexer. In this case, a shielded 4-conductor cable is used to connect the sensor terminals on the A547 with the COM terminals on the multiplexer. 


The A547 requires a desiccated, non-condensing environment. The A547's case has mounting flanges for attachment to the 1"-on-center hole grid of Campbell Scientific enclosures. Grommets and screws are provided to attach the flanges to the backplate of our enclosures.

Listed Under

Other Accessory for the following products:
Common Accessory for the following products: