CS547A
CS547A
OrderableWater Conductivity and Temperature Probe
Pricing
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Configuration
- w/5m (17 ft) per Sensor, Cable Weighted 2.7oz45245-5m-CW
- w/5m (17 ft) per Sensor, No Weight on Cable45245-5m-NW
- w/10m (33 ft) per Sensor, Cable Weighted 2.7oz45245-10m-CW
- w/10m (33 ft) per Sensor, No Weight on Cable45245-10m-NW
- w/15m (50 ft) per Sensor, Cable Weighted 2.7oz45245-15m-CW
- w/15m (50 ft) per Sensor, No Weight on Cable45245-15m-NW
- w/25m (83 ft) per Sensor, Cable Weighted 2.7oz45245-25m-CW
- w/25m (83 ft) per Sensor, No Weight on Cable45245-25m-NW
- w/30m (100 ft) per Sensor, Cable Weighted 2.7oz45245-30m-CW
- w/60m (200 ft) per Sensor, Cable Weighted 2.7oz45245-60m-CW
Select a configuration to add to your quote
- Model:
- CS547A
- Item Number:
- 45245
- Warranty:
- 1 year
Overview
The CS547A probe monitors the electrical conductivity (EC) and temperature of water. EC is measured with three cylindrical stainless-steel electrodes mounted in an epoxy housing. The electrode configuration eliminates ground loop problems associated with sensors in electrical contact with earth ground. The electrodes are ac coupled, and a bipolar excitation is applied. This reduces electrochemical reactions, minimizes corrosion, and extends the probe’s life. Temperature is sensed with a thermistor.
The CS547A is shipped with a cell constant calibrated in a 0.01 molal KCl solution at 25°C. The solution has an EC of 1.408 mS cm-1.
Key Advantages
Epoxy housing is durable and easy to clean
Technical Description
The CS547A measures temperature with a thermistor. Electrical conductivity (EC) is measured with three cylindrical stainless-steel electrodes mounted in an epoxy housing. The electrode configuration eliminates ground loop problems associated with sensors in electrical contact with earth ground. The electrodes are ac coupled, and the data logger applies a bipolar excitation. This process reduces electrochemical reactions, minimizes corrosion, and extends the probe’s life.
The CS547A is easy to clean and resistant to corrosion. It has rounded ends to facilitate installation and removal. The CS547A is shipped with a cell constant calibrated in a 0.01 molal KCl solution at 25°C. The solution has an EC of 1.408 mS cm-1.
Benefits
- Compatible with most Campbell Scientific data loggers
- Easy to clean
- Corrosion resistant
- Rounded ends facilitate installation and removal
- Compatible with AM16/32-series multiplexers allowing measurement of multiple sensors
- Weighted option available for stand-alone submersion
Specifications
- Output
- Analog
(requires A547 interface)
- Conductivity Measurement Range
- ~0.005 to 7 mS/cm
- Temperature Measurement Range
- 0° to 50°C
- Conductivity Accuracy
- The EC accuracy is in a KCl and Na2SO4, NaHCO3, and NaCl Standard Solutions @ 25°C.±5% of reading
(for 0.44 to 7.0 mS cm-1 range)
- Temperature Polynomial Linearization Error
- Typically < 0.1°C
(over 0° to 48°C)
- Thermistor Interchangeability
- Typically < 0.2°C
(over 0° to 50°C)
- Wetted Materials
- Epoxy housing, 316 stainless-steel rings, polyurethane cable
- pH Operating Range
- Solution pH of less than 3.0 or greater than 9.0 may damage the stainless-steel housing.
- Operating Temperature Range
- 0° to 50°C
- Depth Rating
- 305 m
(1000 ft) maximum
- Dimensions
- 8.9 x 2.54 x 1.9 cm
(3.5 x 1 x 0.75 in)
- Weight
- 45 g
(2 oz)
120 g(4.2 oz) with 1.22 m (4 ft) cable
- Weighted Cable Weight
- 80 g
(2.8 oz)
Common Accessories
(3)A547
Conductivity Interface for CS547(A)
The A547 contains blocking capacitors and bridge completion resistors necessary for measurement of the CS547A Temperature and Conductivity Probe.
Orderable7421
Split Mesh Cable Grip, 0.230 to 0.320
The 7421 Split Mesh Cable grip is recommended for use in wells to center the cable and to provide a method of suspending the cable, reducing cable stretch.
Orderable39121
DIN Rail Terminal Kit with 2 Terminals and 5 Wires
The 39121 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires five wires for connection. This kit provides the following wires: black, green, orange, red, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable
Replacement Parts
(2)14195
2.7 oz Weight for the CS547A
This 2.7 oz weight helps to submerge the CS547A to depth when stand-alone submersion is required.
Orderable7785
Nylon Brush, 3/8 in. Diameter 4 in. Length
This brush is used to clean the orifice of the CS547A. The 7785 is shipped with the CS547A, and it is available as a replacement item.
Orderable
Compatibility
The minimum pipe ID that the CS547A fits is 2.79 cm (1.1 in.).
Data Logger Considerations
The A547 Interface is required for connecting the probe to the data logger. This interface contains the blocking capacitors and bridge completion resistors necessary for the conductivity measurement.
A 3-ft cable is shipped with the sensor to connect the A547 to the data logger terminals. The CS547A requires one differential analog input, one single-ended analog input, and two excitation channels. One excitation channel must be capable of delivering ac excitation, so the BDR301 or BDR320 are NOT compatible.
Using Multiple CS547A Conductivity Probes
Special considerations apply when two or more CS547A probes will be measured by a single data logger.
A CR510 cannot be used to measure two probes because it does not provide sufficient (three) excitation channels.
Although it is acceptable for the two thermistors to share an excitation channel, each conductivity measurement requires a dedicated excitation channel. If excitation for the conductivity measurement were to be shared from a common excitation channel, both solutions would become polarized and once excitation was removed, some charge could be transferred from one solution to the other making the measurements interdependent on one another. If more than two CS547A probes are to be measured, then an AM16/32-series multiplexer is required.
Multiplexers
If more than two CS547A probes are to be measured, then an AM16/32-series multiplexer is required. In this scenario, each probe is wired to the multiplexer and one A547 interface is wired between the multiplexer and the data logger. If the system were maximized, up to sixteen CS547As could be connected to the multiplexer. However, because the A547 becomes a part of the measurement circuit for all connections to the multiplexer, only CS547A probes could be connected to the multiplexer (i.e., it is not possible to mix other sensor types with the CS547As attached to the multiplexer).
