CSAT3C

Name: CSAT3C
Brand: Campbell Scientific
SKU: 44629
Availability: PreOrder

3-D Sonic Anemometer for Demanding Flux Research

CSAT3C

PreviewConfigurable

3-D Sonic Anemometer for Demanding Flux Research

Pricing

Configuration

+50C) w/5m (17ft) per Cable w/UTSX Connector+50C)
+50C) w/5m (17ft) per Cable w/Ferrules on Wires+50C)
+50C) w/5m (17ft) per Cable w/RJ45 Connection+50C)
+50C) w/10m (33ft) per Cable w/UTSX Connector+50C)
+50C) w/10m (33ft) per Cable w/Ferrules on Wires+50C)
+50C) w/10m (33ft) per Cable w/RJ45 Connection+50C)
+50C) w/50m (165ft) per Cable w/UTSX Connector+50C)
+50C) w/50m (165ft) per Cable w/Ferrules on Wires+50C)
+50C) w/50m (165ft) per Cable w/RJ45 Connection+50C)
No Cable+50C)

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Model:: CSAT3C
Item Number:: 44629
Warranty:: 1 year
Lead time:: 21 days

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

Next-Generation 3-D Sonic Anemometer Based on Three Decades of Flux Research

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/RoHS2
Compliance: RCM
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)
Filtered Output (data-logger-prompted or unprompted to computer): 395 ms
(with 10 Hz bandwidth filter)
Filtered Output (data-logger-prompted or unprompted to computer): 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)
Current at 10 Hz Measurement Rate: 65 mA
(@ 24 Vdc)
Current at 100 Hz Measurement Rate: 145 mA
(@ 12 Vdc)
Current at 100 Hz Measurement Rate: 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 (u_x, u_y), < ±4.0 cm s^-1 (u_z)
Maximum Gain Error: < ±2% of reading
(wind vector within ±5° of horizontal)
Maximum Gain Error: < ±3% of reading
(wind vector within ±10° of horizontal)
Maximum Gain Error: < ±6% of reading
(wind vector within ±20° of horizontal)

Wind Resolution

u_x, u_y: 1 mm s^-1 RMS
u_z: 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)
Cable Length: 122 m (400 ft) maximum
(@ 250 kbps)
Cable Length: 853 m (2800 ft) maximum
(@ 50 kbps)
Address Range: 1 to 120
Bus Clocks per Sample: ~300