CR6 Measurement and Control Data Logger
One Data Logger, Countless Applications
Now offering a Wi-Fi option
weather applications supported water applications supported energy applications supported gas flux & turbulence applications supported infrastructure applications supported soil applications supported

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Wi-Fi Option Now Available: 
Your CR6 can now create or join a Wi-Fi network.
Read more below.

The CR6 measurement and control data logger is a powerful core component for your data-acquisition system. We combined the best features of all our data loggers and added faster communication, low power requirements, built-in USB, compact size, and improved analogue input accuracy and resolution. The CR6 also introduces our new universal (U) terminal, an ingenious way to allow virtually any sensor—analogue, digital, or smart—to be connected to any U terminal. This is also our first multipurpose data logger capable of doing static vibrating wire measurements.

For help getting started with your CR6, review the "Tips and Tricks: Who's Driving?" article.

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Benefits and Features

  • Powerfully versatile—multi-tool of data acquisition
  • Operational in extreme environments with a standard operating range of -40° to +70°C and an extended operating range of -55° to +85°C
  • U terminals configurable to what you want them to be: analog or digital, input or output
  • Connects directly to a computer's USB port
  • Static vibrating-wire measurements using our patented spectral analysis
  • Surge and overvoltage protection on all terminals
  • Flexible power input from solar panel, DC power supply, 12 V battery, or USB
  • Differentiates even slight changes in data values with high-resolution measurements (to 0.05 µV, 24 bit Adc)
  • Contains an onboard CPI port for hosting Campbell sensors and distributed modules (CDMs)
  • Onboard communication via Ethernet 10/100
  • Create or join a Wi-Fi network with the CR6-WIFI (option)
  • Wiring made easy through removable terminal block
  • Directly connects to Ethernet with 10/100 Ethernet RJ-45 or Ethernet over USB (virtual Ethernet)
  • Medium- and long-range license-free radio compatibility for most countries (optional)
  • MicroSD card drive for extended memory requirements
  • Support for serial sensors with RS-232 and RS-485 native
  • CPI for hosting Campbell high-speed sensors and distributed modules (CDMs)
  • Programmable with CRBasic or SCWin program generator, completely PakBus compatible
  • Shared operating system (OS) with the popular CRBasic CR1000 and CR3000 dataloggers
  • Web server capability, including data display, configuration, diagnostics, and security


Front Left Tilt View
Front Left Tilt View
Front Left Tilt View
Front Right Tilt View
Front View
Back View
Left View
Right View
Top View
Bottom View
Front Left Tilt View with Covers
Right Front Tilt View with Covers

Technical Description

The CR6 measures almost any sensor with an electrical response, drives direct communications and telecommunications, reduces data to statistical values, performs calculations, and controls external devices. After measurements are made, data are stored in onboard, nonvolatile memory awaiting transfer to the computer. Because most applications do not require that every measurement be recorded, the program usually combines several measurements into computational or statistical summaries, such as averages and standard deviations.

Communication Options

The CR6-WIFI Option

The CR6-WIFI is the ideal solution for short-range wireless IP communications.

Using a Wi-Fi enabled device and our free LoggerLink Mobile App, you can wirelessly connect to the CR6-WIFI. The CR6-WIFI comes factory-configured as a Wi-Fi access point. Alternatively, the CR6-WIFI can be configured to join an existing Wi-Fi network with standard or Enterprise (EAP) security.

The CR6-RF407 Option

The CR6-RF407 is ideal for medium-range, license-free radio communications.

This 900 MHz, 250 mW frequency-hopping spread-spectrum radio option can join a high-speed "mesh topology" radio network of other dataloggers using the included RF407 radio.

The CR6-RF412 Option

The CR6-RF412 is ideal for medium-range, license-free radio communications.

Designed primarily for unlicensed operation in Australia and New Zealand, this 922 GHz, 250 mW frequency-hopping spread-spectrum radio can join a high-speed "mesh topology" radio network of other dataloggers using the included RF412 radio.

The CR6-RF422 Option

The CR6-RF422 is ideal for short- to medium-range, license-free radio communications.

Used in the EU, this 868 MHz, 25 mW radio option includes listen-before-talk (LBT) and adaptive-frequency-agility (AFA). It can join a high-speed "mesh topology" radio network of other dataloggers using the included RF422 radio.

The CR6-RF451 Option

The CR6-RF451 is typically used for long-range, license-free radio communications.

With this internal 900 MHz, 1 W, frequency-hopping spread-spectrum radio option, the CR6-RF451 can be part of a "star topology" network where all RF traffic routes back through the master. It can work in a network with other devices using RF450 or RF451 radios. CR6-RF451s may be configured as master, repeater, or remote devices and can be located miles apart in harsh RF environments.


  • Additional specifications are listed in the CR6 Specifications Sheet.
  • This information applies to CR6 dataloggers with serial numbers 7502 and newer. These dataloggers have two blue stripes on the label.
Operating Temperature Range
  • -40° to +70°C (standard)
  • -55° to +85°C (extended)
Universal Inputs 12 individually configured inputs for analog or digital functions
Pulse Counters 16 (C1 to P4 and U1 to U12)
Communications Ports
  • Ethernet
  • USB
  • CS I/O
  • RS-232
  • CPI
  • RS-485
  • SDI-12
Data Storage Ports microSD
Switched 12 Volt 2 terminals
Digital I/O 16 terminals (C1 to C4, U1 to U12) configurable for digital input and output. Terminals are configurable in pairs for 5 V or 3.3 V logic for some functions.
Communications/Data Storage Ports
  • Ethernet
  • RS-485
  • USB
  • CS I/O
  • RS-232
  • CPI
  • microSD
  • SDI-12
Input Limits ±5 V
Analog Voltage Accuracy
  • Accuracy specifications do not include sensor or measurement noise.
  • ±(0.04% of measurement + offset) at 0° to 40°C
  • ±(0.06% of measurement + offset) at -40° to +70°C
  • ±(0.08% of measurement + offset) at -55° to +85°C (extended temperature range)
ADC 24-bit
Power Requirements
  • 16 to 32 Vdc for charger input (CHG)
  • 10 to 18 Vdc for battery input (BAT)
Real-Time Clock Accuracy ±3 min. per year (optional GPS correction to 10 µs)
Internet Protocols Ethernet, PPP, CS I/O IP, RNDIS, ICMP/Ping, Auto-IP(APIPA), IPv4, IPv6, UDP, TCP, TLS, DNS, DHCP, SLAAC, SNMPv3, NTP, Telnet, HTTP(S), FTP(S), SMTP/TLS, POP3/TLS
Communication Protocols PakBus, Modbus, DNP3, SDI-12, TCP, UDP, and others
Warranty 3 years (against defects in materials and workmanship)
Battery-backed SRAM for CPU Usage & Final Storage 4 MB
Data Storage 4 MB SRAM + 72 MB flash (Storage expansion of up to 8 GB with removable microSD flash memory card.)
Idle Current Drain, Average
  • Assumes 12 Vdc on BAT terminals; add 2 mA if using CHG terminals.
  • < 1 mA
Active Current Drain, Average
  • Assumes 12 Vdc on BAT terminals; add 2 mA if using CHG terminals.
  • 3 mA (1 Hz scan)
  • 67 mA (20 Hz scan)
Static Vibrating-Wire Measurements Supported
Dimensions 20.3 x 10.1 x 5.6 cm (8.0 x 4.0 x 2.2 in.)
Additional clearance required for cables and leads.
Weight 0.42 to 0.52 kg (0.92 to 1.15 lb) depending on communication option selected

Average Current Drain

-NOTE- Assumes 12 Vdc on BAT terminals; add 2 mA if using CHG terminals.

CR6-RF407 Option

Radio Type Frequency Hopping Spread Spectrum (FHSS)

Average Current Drain

Idle < 1 mA

CR6-RF407 Option

Output Power 5 to 250 mW (user-selectable)

Average Current Drain

  • 3 mA (1 Hz scan)
  • 67 mA (20 Hz scan)

CR6-RF407 Option

Frequency 902 to 928 MHz (US, Canada)
RF Data Rate 200 kbps
Receive Sensitivity -101 dBm
Antenna Connector RPSMA (External antenna required; see for Campbell Scientific antennas.)

CR6-RF412 Option

Radio Type Frequency Hopping Spread Spectrum (FHSS)
Output Power 5 to 250 mW (user-selectable)
Frequency 915 to 928 MHz (Australia, New Zealand)
RF Data Rate 200 kbps
Receive Sensitivity -101 dBm
Antenna Connector RPSMA (External antenna required; see for Campbell Scientific antennas.)

CR6-RF422 Option

Radio Type Frequency Hopping Spread Spectrum (FHSS)
Output Power 2 to 25 mW (user-selectable)
Frequency 863 to 870 MHz (European Union)
RF Data Rate 10 kbps
Receive Sensitivity -106 dBm
Antenna Connector RPSMA (External antenna required; see for Campbell Scientific antennas.)

CR6-RF451 Option

Radio Type Frequency Hopping Spread Spectrum (FHSS)
Output Power 10 to 1,000 mW (user-selectable)
Frequency 902 to 928 MHz
RF Data Rate 115.2 or 153.6 kbps (user-selectable)
Receive Sensitivity
  • -108 dBm (at 115.2 kbps for 10-4 BER)
  • -103 dBm (at 153.6 kbps for 10-4 BER)
Antenna Connector RPSMA (External antenna required; see for Campbell Scientific antennas.)

CR6-WIFI Option

Operational Modes Client or Access Point
Operating Frequency 2.4 GHz, 20 MHz bandwidth
Antenna Connector RPSMA
Antenna pn 16005 unity gain (0 dBd), 1/2 wave whip, omnidirectional with articulating knuckle joint for vertical or horizontal orientation
Transmit Power 7 to 18 dBm (5 to 63 mW)


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
DevConfig (Version 2.10 or higher)
LNDB (Version 1.2 or higher)
LoggerLink (Version 1.3 or higher)
LOGGERNET (Version 4.3 or higher)
LoggerNet Mobile Connect (Version 1.0 or higher)
PC200W (Version 4.3 or higher)
PC400 (Version 4.3 or higher)
RTDAQ (Version 1.2 or higher)
Short Cut (Version 3.1 or higher)

Additional Compatibility Information


The CR6 has 12 U terminals and four C terminals that are programmable for a variety of functions. This allows the CR6 to measure virtually any sensor, including voltage, resistive bridge, static vibrating wire, pulse, switch closure, SDI-12, and serial RS-232/RS-485.

Measurement & Control Peripherals

The CR6 includes an interface that allows it to connect directly with our CDM device (the SC-CPI interface is not required). The CR6 is also compatible with all of our contemporary SDMs, multiplexers, terminal input modules, and relays. 


The CR6 has an on-board 10/100baseT port for Ethernet communication, a USB port for communication with a PC, and a slot to store data on a microSD card. Compatible telemetry devices include our multidrop modems, short-haul modems, phone modems (land line, digital cellular, and voice-synthesized), RF telemetry, and satellite transmitters (Argos, High Data Rate GOES, and Meteosat). Data can be viewed on the CR1000KD Keyboard Display, CD100 Mountable Display with Keyboard, or an iOS or Android device (requires LoggerLink).


The CR6 and its power supply can be housed in any of our standard enclosures.


The CR6 uses an external power source and has a built-in charger/regulator. Intelligent power sourcing autoselects the highest voltage from three input sources (Chg, Bat, or USB) to operate in one of the following four modes:

  • UPS (recommended) - A 16 to 32 Vdc source, solar panel or charge regulator, is used to charge a 12 Vdc battery, such as our BP7, BP12 or BP24.
  • 12 Vdc battery or other reliable 12 Vdc source
  • Chg only - DC power supply (16 to 32 Vdc)
  • USB - powered over 5 Vdc USB port for setup, programming, and testing (will not charge battery or boost USB power to provide 12 Vdc to SW12 or 12V Power Output terminals)  


CRBasic, the CR6's full programming language, supports simple or complex programming and many on-board data reduction processes. Compatible software includes:

  • LoggerNet (version 4.3 or higher)
  • DevConfig (version 2.10 or higher)
  • PC400 (version 4.3 or higher)
  • PC200W (version 4.3 or higher)
  • Short Cut (version 3.1 or higher)
  • CRBasic (version 3.5 or higher)
  • LoggerLink (version 1.3 or higher)
  • RTDAQ (version 1.2 or higher)
  • LNDB (version 1.2 or higher)


CR6 OS v.8.00 (6.87 MB) 27-06-2018

(WARNING) If updating the dataloggers operating system from a version prior to 7.0, the user will need to install updated USB drivers for the CR6. The new drivers are available in Device Configuration Utility version 2.16 (or greater) which is available on the Campbell Scientific website.

Execution of this download installs the Operating Systems for the CR6 and all integrated communication options to your computer. It also updates the CRBasic Editor compiler and support files. The Device Configuration Utility is used to upload the Operating Systems to the CR6.

Note: Upgrading the Operating System will reset all the CR6’s settings back to the factory defaults.  Sending this OS remotely is not recommended.  To restore settings after the update, it is recommended that a backup be made of the current logger settings or take programmatic measures to ensure your settings can be restored. This can be done using the DevConfig backup utility or CRBasic instruction SetSetting.

Watch the Video Tutorial: Sending an OS to a Local Datalogger.

View Revision History

Device Configuration Utility v.2.17 (46.4 MB) 13-02-2018

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 10, 8.1, 8, and 7 (Both 32 and 64 bit)

View Revision History

CPI Calculator v.1.0 (2.49 MB) 06-07-2016

The CPI Calculator is a downloadable Microsoft Excel spreadsheet used to estimate the usage and capacity of a CPI network.  The calculator provides an overview on CPI devices including the CDM-A108, CDM-A116, CDM-VW300, CDM-VW305, and the CSAT3B.  The calculator can also estimate the measurement speed of the CDM-A108 and CDM-A116 based on the number of channels and measurement parameters.


The CPI Calculator is an estimation tool and will help you better understand and design CPI networks by considering the following:

  1. What is the capability of each CDM or CPI device
  2. What is the CPI network capacity
  3. How much of the CPI capacity are the CDMs or CPI devices using


Related FAQs

Number of FAQs related to CR6: 4

Expand AllCollapse All

  1. When idle, the CR1000, CR6, and CR1000X consume less than 1 mA @ 12Vdc. Similar to the CR6, the CR1000X has a much faster processor that requires more power when up and running. As such, there will be higher current draws during active measurements, serial communications, or when plugged into a PC via USB or Ethernet.

    It may be helpful to think of the CR6 and CR1000X as being built on the same "platform."

  2. The CR6 can support up to 11 AM25T devices in ideal conditions. Typical systems generally use 3 to 5 AM25Ts per data logger because of practical limitations including the location of the AM25T, the quantity of sensor wire, the wiring complexity, and the wire length. 

  3. Campbell Scientific sells, and embeds in their products, microSD cards that have single-level cell (SLC) memory. In contrast, many electronics retailers sell microSD cards that have multi-level cell (MLC) memory. The difference between these two types of memory is significant.

    • The SLC microSD cards from Campbell Scientific are better suited for industrial and environmental applications where wide operating temperatures, low power consumption, and longevity are very important. Most SLC memory cards are designed with industrial applications in mind and, therefore, often have additional perks such as enhanced protection from ESD (electrostatic discharge) and mechanical damage.
    • The MLC microSD cards commonly available at electronics retailers are less expensive, but they are generally not well suited for the majority of applications in which Campbell Scientific data acquisition products are used.
  4. The serial modem can be connected to a CR6 using any of the following methods:

    • Connect the modem to the RS-232/CPI port on the CR6 using cable pn 31055 (RS-232/CPI RJ45 to DB9 Male DTE).
    • Connect the modem to the RS-232/CPI port on the CR6 using cable pn 31056 (RS-232/CPI RJ45 to DB9 Female DCE).
    • Connect the modem to a C or U terminal pair on the CR6, where the pair has been configured for serial I/O.
    • Connect the modem to the CS I/O port on the CR6 using an SC105.

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