CSAT3C
CSAT3C
Orderable3-D Sonic Anemometer for Demanding Flux Research
Pricing
Configuration
Sign in for option pricing- +50C) w/5m (17ft) per Cable w/UTSX Connector44629-5m-CU
- +50C) w/5m (17ft) per Cable w/Ferrules on Wires44629-5m-PF
- +50C) w/5m (17ft) per Cable w/RJ45 Connection44629-5m-RC
- +50C) w/10m (33ft) per Cable w/UTSX Connector44629-10m-CU
- +50C) w/10m (33ft) per Cable w/Ferrules on Wires44629-10m-PF
- +50C) w/10m (33ft) per Cable w/RJ45 Connection44629-10m-RC
- +50C) w/50m (165ft) per Cable w/UTSX Connector44629-50m-CU
- +50C) w/50m (165ft) per Cable w/Ferrules on Wires44629-50m-PF
- +50C) w/50m (165ft) per Cable w/RJ45 Connection44629-50m-RC
- No Cable44629-NC
- +50C) No Cable w/UTSX Connector44629-NC-CU
- +50C) No Cable w/Ferrules on Wires44629-NC-PF
- +50C) No Cable w/RJ45 Connection44629-NC-RC
Select a configuration to add to your quote
- Model:
- CSAT3C
- Item Number:
- 44629
- Warranty:
- 1 year
Overview
Building on more than three decades of field-proven sonic anemometer performance, the CSAT3C delivers reliable 3-D wind flux measurements in even the harshest environments.
First introduced in 1995, the CSAT3 set the standard for measuring turbulent fluxes with its non-orthogonal design optimized for eddy-covariance applications. Each generation has since evolved based on real-world field feedback, including the CSAT3B’s integrated electronics.
Now, the CSAT3C advances that legacy with a design hardened for challenging conditions.
While maintaining the same trusted measurement geometry and version 5 algorithm, the CSAT3C introduces meaningful durability and usability improvements, including improved and advanced coatings, dustproof and waterproof sealed connectors, and simplified installation. It provides three-dimensional wind measurements (Ux, Uy, and Uz) and sonic temperature (Ts) at output rates up to 100 Hz. The result is a reliable, long-term solution for accurate 3-D wind speed and direction monitoring, even in precipitation and very high winds.
Key Advantages
Technical Description
Reduced Flow Distortion
The CSAT3-series non-orthogonal, field-proven aerodynamic design has been cited in more than 100 peer-reviewed research papers. The CSAT3C retains this design, which is engineered to minimize flow distortion.
Reliable Operation
The CSAT3C has an upgraded transducer coating and sealed connectors.
Measurement of Rapidly Changing Conditions
The CSAT3C delivers up to 100 Hz output with selectable bandwidth filters for accurate flux measurements, making the CSAT3C ideal for turbulence and eddy-covariance studies.
Streamlined Installation
The CPIP cable carries power and communications in one cable. It is being standardized across all future Campbell Scientific micromet sensors to eliminate setup complexity and wiring errors in the field.
Additional Diagnostics
With a built-in inclinometer and internal temperature and relative humidity measurements, the CSAT3C provides additional context for data and system monitoring.
Improved Data Accuracy
The CSAT3C automatically corrects speed of sound and sonic temperature measurements to eliminate the need for additional post-processing.
Refined Flux Measurements
Optional Kaimal corrections account for transducer diameter and sonic path length, reducing flow distortion effects unique to the sensor geometry.
Compatibility
- CPI mode provides synchronization of all sensor measurements across complex topologies.
- RS-485 ASCII mode features 100 Hz unprompted output, selectable bandwidth filters, and high noise immunity on long cable runs, enabling direct integration into third-party data acquisition systems.
Benefits
- Reduced flow distortion with a field-proven design
- Ability to capture rapidly changing turbulence conditions with a high-rate output
- Streamlined installation with a single-cable design
- Version 5 algorithm for calculating data outputs, combining the signal sensitivity of version 3 with the rain performance of version 4
- More diagnostics without added sensors
- Improved data accuracy in real time with online crosswind correction
- Refined flux measurements with optional Kaimal corrections
- Open outputs for direct integration into non-Campbell Scientific data loggers and computers without proprietary hardware requirements
Specifications
- Measurement Description
- Highest-quality wind speed and direction
- Sensor
- Three-dimensional sonic anemometer
- Operating Temperature Range
- -40° to +50°C
- Measurement Path Length
- 10.0 cm (3.9 in.) vertical; 5.8 cm (2.3 in.) horizontal
- Transducer Angle from Horizontal
- 60 degrees
- Wind Full-Scale Range
- ± 65 m s–1
- Sonic Temperature Resolution
- ±0.002°C RMS
(at 25°C)
- Sonic Temperature Reporting Range
- -40° to +50°C
- Ingress Protection
- IP67
- Compliance
- CE/RoHS2RCM
- Transducer Diameter
- 0.64 cm
(0.25 in.)
- Transducer Mounting Arm Diameter
- 0.84 cm
(0.33 in.)
- Support Arm Diameter
- 1.59 cm
(0.63 in.)
- Overall Dimensions
- 63.1 x 12.3 x 43.3 cm
(24.8 x 4.9 x 17.0 in.)
- Anemometer Head Weight
- 1.9 kg
(4.2 lb)
Measurement Rates
- Data Logger Triggered
- 1 to 100 Hz
- Unprompted Output (to computer)
- 1, 10, 20, 50, or 100 Hz
- Internal Self-Trigger Rate
- 100 Hz
Measurement Delay
- Data Logger Triggered (no filter)
- One trigger period
(one scan interval)
- Unprompted Output (no filter)
- 10 ms
- Filtered Output (data-logger-prompted or unprompted to computer)
- 795 ms
(with 5 Hz bandwidth filter)
395 ms(with 10 Hz bandwidth filter)
155 ms(with 25 Hz bandwidth filter)
Internal Monitor Measurements
- Update Rate
- 2 Hz
- Inclinometer Accuracy
- ±1°
- Relative Humidity Accuracy
- ±3%
(over 10 to 90% range)
- Board Temperature Accuracy
- ±2°C
Power Requirements
- Anemometer Voltage Requirement
- 10.5 to 32 Vdc
- Current at 10 Hz Measurement Rate
- 110 mA
(@ 12 Vdc)
65 mA(@ 24 Vdc)
- Current at 100 Hz Measurement Rate
- 145 mA
(@ 12 Vdc)
80 mA(@ 24 Vdc)
Wind Accuracy
- -NOTE-
- Accuracy specifications assume the following:
-40° to +50°C operating rangeWind speeds < 30 m s-1Wind angles between ±170°
- Maximum Offset Error
- < ±8.0 cm s-1 (ux, uy), < ±4.0 cm s-1 (uz)
- Maximum Gain Error
- < ±2% of reading
(wind vector within ±5° of horizontal)
< ±3% of reading(wind vector within ±10° of horizontal)
< ±6% of reading(wind vector within ±20° of horizontal)
Wind Resolution
- ux, uy
- 1 mm s-1 RMS
- uz
- 0.5 mm s-1 RMS
CPI
- -NOTE-
- Used for Campbell Scientific data-logger-based, time-synchronized data acquisition
- Baud Rate
- 50 kbps to 1 Mbps
- Cable Length
- 15 m (50 ft) maximum
(@ 1 Mbps)
122 m (400 ft) maximum(@ 250 kbps)
853 m (2800 ft) maximum(@ 50 kbps)
- Address Range
- 1 to 120
- Bus Clocks per Sample
- ~300
RS-485
- -NOTE-
- Used for third-party data acquisition system integration
- Baud Rate
- 9.6 kbps to 115.2 kbps
- Cable Length
- 305 m (1,000 ft) maximum
(@ 115.2 kbps)
610 m (2,000 ft) maximum(@ 9.6 kbps)
- Bus Clocks per Sample
- ~500
(ASCII formatted)
USB
- -NOTE-
- Used for anemometer configuration
- Connection Speed
- USB 2.0 full speed 12 Mbps
- Cable Length
- 5 m (16.4 ft) maximum
Accessories
(8)CPIPCBL2
CPI Non-Armored Communications and Power Cable with UTSX Eight-Pin Socket Connector
Orderable10080
Thermocouple Cover for CSAT3, CSAT3B, or IRGASON
Orderable31423
Fine-Wire Thermocouple Cover Backplate
OrderableFW05
Type E Fine-Wire Thermocouple with 0.0005 in. Diameter
OrderableFW1
Type E Fine-Wire Thermocouple with 0.001 in. Diameter
OrderableFW3
Type E Fine-Wire Thermocouple with 0.003 in. Diameter
OrderableFW/ENC
Fine-Wire Thermocouple Carrying Case (hold four thermocouples)
OrderableFWC
Connector Cable for Fine-Wire Thermocouples
Orderable
Other Accessories
(7)10080
Thermocouple Cover for CSAT3, CSAT3B, or IRGASON
The 10080 is a white thermocouple cover for the FW05, FW1, and FW3 connectors. This cover is placed over the Omega-brand thermocouple connectors and is used to mount the connectors to the side of the CSAT3 or IRGASON FWTC bracket.
Orderable31423
Fine-Wire Thermocouple Cover Backplate
The 31423 is a backplate for the fine-wire thermocouple cover (pn 10080) and is required when adding a fine-wire thermocouple to a CSAT3C/B/A. The backplate includes a screw for attaching the plate to the CSAT3C/B/A block.
OrderableFW05
Type E Fine-Wire Thermocouple with 0.0005 in. Diameter
The FW05 is a Type E thermocouple with a 0.0005 in. diameter. It measures atmospheric temperature gradients or fluctuations with research-grade accuracy. The FW05 is compatible with most Campbell Scientific data loggers, and it is often used in eddy-covariance systems.
OrderableFW1
Type E Fine-Wire Thermocouple with 0.001 in. Diameter
The FW1 is a Type E thermocouple with a 0.001 in. diameter. It measures atmospheric temperature gradients or fluctuations with research-grade accuracy. The FW1 is compatible with most Campbell Scientific data loggers, and it is often used in eddy-covariance systems.
OrderableFW3
Type E Fine-Wire Thermocouple with 0.003 in. Diameter
The FW3 is a Type E thermocouple with a 0.003 in. diameter. It measures atmospheric temperature gradients or fluctuations with research-grade accuracy. The FW3 is compatible with most Campbell Scientific data loggers, and it is often used in eddy-covariance systems.
OrderableFW/ENC
Fine-Wire Thermocouple Carrying Case (hold four thermocouples)
The FW/ENC is a carrying case that holds four FW-series fine-wire thermocouples. Because of their fragile nature, the thermocouples must be shipped in this case.
OrderableFWC
Connector Cable for Fine-Wire Thermocouples
The FWC is a cable that connects a fine-wire thermocouple to a data logger. One FWC is required for each FW05, FW1, or FW3 thermocouple.
Orderable
Replacement Parts
(2)28902
Spare Sonic Wicks Kit
The Spare Sonic Wicks Kit includes three upper transducer wicks, three lower transducer wicks, and a wick-installation tool.
Orderable29191
CSAT3B(H) Foam Case Set
The 29191 is a foam set that is inserted into either the CSAT3 Carrying Case or a thick cardboard box with approximately the following dimensions: 73.7 x 45.7 x 25.4 cm (29 x 18 x 10 in.). The foam set protects a CSAT3 sonic anemometer and its accessories during transport or shipping.
Orderable
Services
(3)16554
CSAT3A/B/BH/C Standard Calibration without CMM or Data
The 16554 provides calibration over the CSAT3A, CSAT3B, CSAT3BH, or CSAT3C operating temperature range without using the coordinate measurement machine (CMM); the CMM is used on the anemometer at the time of original purchase. During calibration, Campbell Scientific determines if the geometry of the heads has changed since original manufacture. If so, the 16555 calibration is required. In all cases, factory calibration requires a Return Material Authorization (RMA).
Orderable16555
CSAT3A/B/BH/C Calibration with CMM but without Data
The 16555 includes calibration over the CSAT3A, CSAT3B, CSAT3BH, or CSAT3C operating temperature range and coordinate measurement of transducer positions in space relative to the bubble mounting surface. A coordinate measurement machine (CMM) is used for this process. CMM measurement is performed on the anemometer at the time of original purchase. This calibration option (instead of the CAL-CSAT3) is required if the geometry of the heads has changed since original manufacture. In all cases, factory calibration requires a Return Material Authorization (RMA).
Orderable38945
Sonic Anemometer Inspection, Diagnosis, and Evaluation
The 38945 service is for Campbell Scientific sonic anemometers (CSAT3, CSAT3A, CSAT3B, CSAT3BH, and CSAT3C) that are sent in for repair service, but, after diagnosis, it is determined that the sensor cannot be repaired or calibrated, or repair is not required. This service fee covers the required sensor testing for the evaluation.
Orderable
Compatibility
Compatible Products
(3)
Incompatible Products
(2)
Related Resources
Documents
- Brochure
CSAT3C | The Next Evolution of a Proven Platform
June 2026
View Document - Technical Paper
Eddy Covariance Hardware Troubleshooting — Preparing for a Site Visit
June 2026
View Document - Brochure
CSAT3C 3-D Sonic Anemometer for Demanding Flux Research
June 2026
View Document - Brochure
Upgrade Guide | CSAT3B to CSAT3C
June 2026
View Document
Showing 4 of 9 results
See all DocumentsDownloads
- CSAT3C Program Examplesv1Login required
September 11, 2026
Software ApplicationsThis download contains two example programs: one for reading the CSAT3C 3-D Sonic Anemometer on the CPI port and a second for reading the CSAT3C using RS-485 unprompted ASCII data collection. These programs are written for the CR1000X, but programming for other supported data loggers will be similar.
- Device Configuration Utilityv2.36Login required
June 22, 2026
Software ApplicationsA software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package. Supported Operating Systems: Windows 11 or 10 (Both 32 and 64 bit)