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


The A547 is an interface that allows your Campbell Scientific datalogger to measure a CS547A water conductivity probe.

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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 datalogger, 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)


Water Conductivity Sensors

The A547 can be used with the CS547A and the retired CS547.

Datalogger 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.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X


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.



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


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

Common Accessory for the following products: