CPEC300
CPEC300
End of lifeCompact Closed-Path Eddy-Covariance System with EC155 and Pump Module
No longer available to order
This product is retained for service, documentation, and compatibility information.
Replaced by
- Model:
- CPEC300
- Item Number:
- 33595
- Warranty:
- 1 year
Overview
The CPEC300 with EasyFlux® is a turn-key, closed-path eddy-covariance (EC) flux system for long-term monitoring of atmospheric-biosphere exchanges of carbon dioxide, water vapor, heat, and momentum. A complete system consists of a closed-path gas analyzer (EC155 closed-path gas analyzer), sonic anemometer (CSAT3A sonic anemometer), data logger (CR6 datalogger), and sample pump.
The gas analyzer’s intake design and small sample cell volume (5.9 mL) provide excellent frequency response (4.3 Hz cutoff frequency) with low total system power (12 W). Additionally, the vortex intake (United States Patent No. 9,217,692) greatly reduces maintenance and maintains frequency response compared to traditional inline filters.
Key Advantages
Ideal for applications that don't require automatic zero and span
Technical Description
The gas analyzer’s small sample cell volume (5.9 mL) minimizes the sample residence time (50 ms at the system’s nominal flow rate, 7 LPM). This gives excellent frequency response (5.8 Hz half-power bandwidth) with low total system power (12 W).
Eddy-Covariance Measurements
CO2 and H2O are measured with an EC155 Closed-Path Gas Analyzer. Three-dimensional wind speed and sonic air temperature are measured with a CSAT3A sonic anemometer head.
CPEC300 System Enclosure
The 24.9 x 34.0 cm (9.8 x13.4 in.) enclosure houses the EC100 electronics and the CR6 datalogger attached to the lid of the enclosure. The CPEC300 enclosure can be mounted to a tripod mast, CM106 tripod leg base, tower legs, or a large-diameter pole.
CPEC300 Pump Module
The pump module, a standard component of the CPEC300 system, consists of a small dual-head diaphragm pump with a brushless dc motor mounted inside a fiberglass enclosure. An integral cable connects the pump module to the CPEC300 system enclosure, which provides power, temperature measurement and control, pressure measurement, and pumping speed measurement and control.
Benefits
- Compact, entry-level system with integrated CR6 running EasyFlux<sup>®</sup> DL
- Suitable for sites with easy access to the data logger
- Simple design for easy and quick deployment
Specifications
- Operating Temperature Range
- -30° to +50°C
- Input Voltage Range
- 10.5 to 16.0 Vdc
- Power
- 12 W
(typical)
35 W(maximum, at cold startup)
System Enclosure
- Dimensions
- 34 x 25 x 13 cm
(13.4 x 9.8 x 5.1 in.)
- Weight
- 4.02 kg
(8.85 lb)
Pump Module
- Inlet Connection
- 3/8-in. Swagelok
- Pressure Sensor Range
- 15 to 115 kPa
- Pumping Speed
- 3 to 9 LPM
(automatically controlled at the set point, typically 7 LPM)
- Cable Length
- 3.0 m
(10 ft)
- Dimensions
- 35.6 x 29.2 x 13.5 cm
(14.0 x 11.5 x 5.3 in.)
- Weight
- 5.4 kg
(11.8 lb)
Accessories
(10)CABLEPCBL
2-Conductor 16 AWG Power Cable
OrderableCABLE4CBL
4-Conductor 22 AWG Cable with Drain
Orderable45309
CPEC200/300 Pump Tubing Assembly, 0.375 OD
Orderable21823
Calibration Gas Tubing Assembly
OrderableCR1000KD
Keyboard/Display for CR1000(X), CR800, or CR6
OrderableEasyFlux DL
Eddy-Covariance Data Logger Program
Orderable45308
CPEC200/300 Pump Tubing Assembly, 0.500 OD
Orderable27158
2 GB microSD Flash SLC Memory Card
Orderable38476
16 GB microSD Flash aMLC Memory Card
OrderableEasyFlux PC
Eddy-Covariance Post-Processing PC Software
Orderable
Common Accessories
(8)CR1000KD
Keyboard/Display for CR1000(X), CR800, or CR6
The CR1000KD is a portable keyboard and display screen for our dataloggers that have a CS I/O port, including the CR1000, CR1000X, CR800, CR850, and CR6. It allows you to check the datalogger's status, display or plot sensor readings and stored values, and enter numeric data or change port/flag state. One CR1000KD may be carried from station to station in a datalogger network.
OrderableCABLEPCBL
2-Conductor 16 AWG Power Cable
The CABLEPCBL-L is a 16 AWG, two-conductor cable with a Santoprene jacket. The conductors are stripped and tinned. This generic cable is used to power remote peripherals.
OrderableCABLE4CBL
4-Conductor 22 AWG Cable with Drain
The CABLE4CBL-L is a 22-AWG, four-conductor cable with a Santoprene jacket and an aluminum Mylar shield. It is used for SDM communication. The conductors are stripped and tinned and have red, black, green, and white insulation colors.
Orderable45309
CPEC200/300 Pump Tubing Assembly, 0.375 OD
The 26504-L is one option for the pump module. The 26504-L is a pre-swaged 3/8 in. OD pump tubing assembly used for connecting the EC155 CO2/H2O Closed-Path Gas Analyzer to the pump module with a recommended maximum distance of 50 ft. For distances longer than 50 ft between the EC155 and the pump module (up to 500 ft), Campbell Scientific recommends using a larger ½ in. OD tubing assembly (26503-L).
Orderable45308
CPEC200/300 Pump Tubing Assembly, 0.500 OD
The 26503-L is one option for the pump module. The 26503-L is a pre-swaged ½ in. OD pump tubing assembly used for connecting the EC155 CO2/H2O Closed-Path Gas Analyzer to the pump module with a recommended distance of 50 to 500 ft. For distances shorter than 50 ft between the EC155 and the pump module, Campbell Scientific recommends using a smaller 3/8 in. tubing assembly (26504-L).
Orderable21823
Calibration Gas Tubing Assembly
Campbell Scientific recommends using one 21823 with the system. The Tee Connection option is not needed. The 21823 provides a calibration gas tubing assembly. Tubing length is user specified.
Orderable27158
2 GB microSD Flash SLC Memory Card
Campbell Scientific recommends using at least one microSD card with the system, and the 27158 is one option. The 27158 is a 2 GB microSD flash-memory card designed for use in harsh conditions often presented by environmental and industrial applications.
Orderable38476
16 GB microSD Flash aMLC Memory Card
Campbell Scientific recommends using at least one microSD card with the system, and the 38476 is one option. The 38476 is a 16 GB microSD flash-memory card designed for use in harsh conditions often presented by environmental and industrial applications in which customers require higher reliability, endurance, and performance but also seek a cost-effective solution to meet budget-planning requirements.
Orderable
Other Accessories
(2)EasyFlux PC
Eddy-Covariance Post-Processing PC Software
EasyFlux™ PC is a free computer program that processes high frequency time series data, collected using a Campbell Scientific eddy-covariance flux system, into fluxes following community accepted practices. Fully corrected fluxes of CO2, latent heat (H2O), sensible heat, and momentum are available, in generic, AmeriFlux, and GHG-Europe ASCII formats.
OrderableEasyFlux DL
Eddy-Covariance Data Logger Program
EasyFlux™ DL is a free CRBasic program that enables a datalogger to report fully corrected fluxes of CO2, latent heat (H2O), sensible heat, and momentum from a Campbell Scientific open-path eddy-covariance (EC) system. Final fluxes are processed from raw high frequency time series data by applying commonly used corrections found in scientific literature.
Orderable
Replacement Parts
(26)33384
EC155 Replacement Molecular Sieve Bottles
The 33384 contains two desiccant/scrubber bottles utilizing a non-hazardous molecular sieve. Each bottle contains necessary chemicals and membrane filters for scrubbing CO2 and water vapor from the gas analyzer housing. Empty chemical bottles should be disposed of according to local and federal regulations. SDS (Safety Data Sheet) forms for the chemicals are included in the EC155 manual.
Orderable28902
Spare Sonic Wicks Kit
The Spare Sonic Wicks Kit includes three upper transducer wicks, three lower transducer wicks, and a wick-installation tool.
Orderable34007
CPEC300-Series Replacement Auxiliary Feed through 2-inch Cap with Screw
This replacement part is for any lost or broken feedthrough cap that comes with the CPEC300. The 34007 includes the cap and a screw to secure the cap to the CPEC300 main enclosure.
Orderable42815
Four-Unit Desiccant Bags (quantity of 10)
The 42815 includes 10 large, four-unit desiccant bags, used to absorb humidity within enclosures. Multiple packs are recommended for customers who need to desiccate multiple enclosures or systems.
Orderable28878
Replacement Enclosure Humidity Indicator Card
The 28878 is a replacement humidity indicator card. It provides a visual reference of humidity level inside the enclosure.
Orderable30028
Replacement Lithium Battery
The 30028 fits inside a CR6-series datalogger. This lithium battery powers the clock and SRAM when external battery power, a charging source, or a USB power source is not connected. The 30028 is a 3.6 Vdc, 2.4 Ah, AA size cell. The 30028 needs to be periodically replaced.
Orderable8125
Flat-Bladed Screwdriver, 2.5 mm Blade x 50 mm Shaft
The 8125 is a small, flat-bladed screwdriver that is extremely useful for opening the guillotine terminals on our dataloggers and measurement control devices.
Orderable26563
USB Data Cable, Type A Pin (Male) to IP68 Panel Type Mini-B Pin (Male), 4.5 m
The 26563 cable is 4.5 m long. It may be purchased to replace a lost or damaged cable for EC100s that have a plastic USB connector. If the EC100 has a metal USB connector, order the 30179 replacement cable instead.
Orderable30179
USB Data Cable, Type A Male to Type Mini-B Male, IP68, 5 m
The 30179 cable is 6 ft long. It may be purchased to replace a lost or damaged cable for EC100s that have a metal USB connector. If the EC100 has a plastic USB connector, order the 26563 replacement cable instead.
Orderable27555
USB 2.0 Cable, Type A Pin (Male) to Micro B Pin (Male), 6/6.5 ft
The 27555 is a USB Type A to Micro B, pin (male)-to-pin (male) cable, 6 to 6.5 ft long. It connects devices using the Micro B interface to a USB port on a computer.
Orderable32203
EC155 Replacement Vortex Filter Kit
The 32203 is a replacement in-line filter kit for the EC155 heated vortex. The kit includes a 25 µm filter and new ¼ in. Swagelok® nuts.
Orderable560
Screw #10-32 x .312 Pan Phillips
The 560 screw is used to attach a backplate to the inside of an enclosure.
Orderable33241
Replacement Pump Kit for CPEC200/300 or AP200
The 33241 is the replacement for the CPEC300 pump. As of January 2024, this pump's tachometer has a different reading (two pulses per revolution) than the previous replacement pump (one pulse per revolution) and requires a program update to output the correct calculated sample flow rate. Please contact Campbell Scientific for assistance on code modifications.
Orderable27153
EC155 Replacement Carrying Case with Foam Insert
The 27153 replaces a damaged EC155 carrying case and includes a foam insert. The carrying case may also be ordered as a separate item if it wasn't ordered initially with the EC155.
Orderable31461
CSAT3A Replacement Carrying Case with Foam Insert
The 31461 facilitates transporting the CSAT3A from site to site. The 31461 is offered as a replacement item for customers who do not have the foam that originally shipped with the CSAT3A.
Orderable33434
CSAT3A Replacement Carrying Case without Foam
The 33434 is a carrying case without foam inserts that facilitates transporting the CSAT3A. The 33434 is intended for customers who already have foam inserts that were shipped with their CSAT3A.
Orderable28640
Replacement CR6 18-Position Universal Terminal
The 28640 universal terminal connector is shipped attached to our CR6-series dataloggers. This lockable connector provides screw terminals for connecting digital or analog sensor or control wires to the CR6.
Orderable25600
Replacement CR6 12-Position Control Terminal
The 25600 control terminal connector is shipped attached to our CR6-series dataloggers. This lockable connector provides screw terminals for connecting digital sensor, general I/O, and control wires to the CR6.
Orderable27651
Replacement CR6 Power Connector
The 27651 power connector is shipped attached to our CR6-series dataloggers. This green, removable connector provides screw terminals for connecting the wires of a 12 V battery and/or a 16 to 32 Vdc charging source, such as a power converter or solar panel, to the CR6.
Orderable26570
EC155 Mounting Platform
The 26570 is required to mount the EC155 closed-path gas analyzer and the CSAT3A sonic anemometer head to a mounting structure.
OrderableCM250
Leveling Mounting Kit
The CM250 is a leveling mount kit for attaching the EC155 to a crossarm.
Orderable16005
2.4 GHz 0 dBd Omnidirectional 1/2 Wave Whip Antenna
The 16005 is a unity gain (0 dBd), 1/2 wave whip, omnidrectional antenna that features an articulating knuckle joint for easy orientation, weatherized jacket for outdoor applications, and internal counterpoise for ground plane independence.
Orderable34248
EC100 Mounting Kit for the CR6
The 34248 is a kit that includes all the necessary parts to mount a CR6 datalogger in the lid of an EC100 enclosure using a bracket.
Orderable27008
EC155 Foam Case Set
The EC155 Foam Case Set is typically ordered as a replacement part for the foam set that came with the original EC155. The foam set is designed to be used in either the EC155 carrying case or a cardboard box. This foam set protects the EC155 and its parts when travelling with the instrument.
Orderable31693
Heated Vortex Intake for the EC155
The EC155 Heated Vortex Intake is designed to separate particulates from the sample flow and reduce condensation. This newer vortex intake replaces the old vortex intake design that was susceptible to cracking near the intake. While the cracking on old vortex intakes is just cosmetic and does not affect measurements, users may want to replace their old intake with this new one.
Orderable
Note: EC155 units that were shipped after March 29, 2018, have the new vortex intake already. The 31693 is intended for customers with an older EC155 unit.44299
Replacement Sonic Head for CSAT3A
This sonic anemometer head is similar to the sensor head from the CSAT3 sonic anemometer, but its cable is modified to connect to the EC100 electronics.
Orderable
Services
(2)27332
EC155, CPEC200, and CPEC3XX Calibration with Zero and Span
The 27332 provides a calibration with zero and span. When drift between zero and span checks seems unstable, or when diagnostic output indicates a problem, the instrument should be sent in for a full factory calibration with zero and span. An RMA is required.
Orderable27333
EC155, CPEC200, and CPEC3XX Zero and Span
The 27333 allows customers to send their EC155 or CPEC300 to Campbell Scientific and have Campbell Scientific perform a zero and span; an RMA (Returned Material Authorization) is required. The zero and span should be done when ambient conditions change significantly (i.e., seasonally).
Orderable
Ships With
(12)27008
EC155 Foam Case Set
Orderable26570
EC155 Mounting Platform
OrderableCM250
Leveling Mounting Kit
Orderable28878
Replacement Enclosure Humidity Indicator Card
Orderable8125
Flat-Bladed Screwdriver, 2.5 mm Blade x 50 mm Shaft
Orderable30179
USB Data Cable, Type A Male to Type Mini-B Male, IP68, 5 m
Orderable27555
USB 2.0 Cable, Type A Pin (Male) to Micro B Pin (Male), 6/6.5 ft
Orderable16005
2.4 GHz 0 dBd Omnidirectional 1/2 Wave Whip Antenna
Orderable- EC155 Certificate of Conformance
- EC155 Packing Information Sheet
- Quick Deploy Guide
- Training Voucher
Similar Products
(6)CPEC306
Expandable Closed-Path Eddy-Covariance System with EC155 and Pump Module
OrderableCPEC310
Expandable Closed-Path Eddy-Covariance System with EC155, Pump Module, and Automatic Zero and Span
OrderableIRGASON
Integrated CO2 and H2O Open-Path Gas Analyzer and 3-D Sonic Anemometer
OrderableEC150
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OrderableEC155
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OrderableAP200
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Orderable
Related Resources
Documents
- Manual
EC155 Packing Information
November 2018
View Document - Technical Paper
Replacing the Vortex Intake in an Older EC155
August 2018
View Document - Technical Paper
An eddy-covariance system with an innovative vortex intake for measuring carbon dioxide and water fluxes of ecosystems
March 2017
View Document - Brochure
EC155 CO2 and H2O Closed-Path Gas Analyzer
April 2026
View Document
Showing 4 of 18 results
See all DocumentsDownloads
- OS and FirmwareCR6 OSv15.0.0
April 17, 2026
This download is for the CR6 datalogger. Execution of this download places the current CR6 Operating System file(.obj) and WiFi, RF45x and RF4xx operating systems (iobj) on your computer. It also updates the CRBasic Editor compiler and support files. Why Update? New features and bug fixes. With this OS update it is recommended that you also update the Device Configuration Utility to the most recent version so that new datalogger features are available in the utility. Note: Campbell Scientific always recommends updating operating systems on site if possible. When remote updates are required, it is recommended that you implement the necessary precautions to handle unexpected OS upload complications. All datalogger settings should be retained when updated remotely. If you choose to roll back to a previous operating system, the datalogger settings will be reset to default. Watch the Video Tutorial: Sending an OS to a Local Datalogger.
- OS and FirmwareEC100 OSv8.02
October 14, 2019
EC100 Operating System. Watch the Video Tutorial: Updating the EC100 Operating System.
- Software ApplicationsECMonv1.6
March 29, 2016
EC100-Series Support Software.
- Software ApplicationsDevice Configuration Utilityv2.36
June 22, 2026
A 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)
Showing 4 of 6 results
See all DownloadsServices Available
- Repair
- No
- Calibration
- No
- Free Support
- No