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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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 analog input accuracy and resolution. The CR6 also introduces our new universal (U) terminal, an ingenious way to allow virtually any sensor—analog, digital, or smart—to be connected to any U terminal. This is also our first multi purpose data logger capable of doing static vibrating-wire measurements.

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Benefits and Features

  • Powerfully versatile—multi-tool of data acquisition
  • U terminals configurable to what you want them to be: analog or digital, input or output
  • 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
  • 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
  • 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


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Front Left Tilt View with Covers
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Technical Description

All CR6 data loggers are tested and guaranteed to meet electrical specifications in a standard -40° to +70°C or extended -55° to +85°C non-condensing environment. Data logger recalibration is recommended every three years. System configuration and critical specifications should be confirmed with Campbell Scientific before purchase.

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-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 data loggers 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 data loggers 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.


Note: Additional specifications are listed in the CR6 Specifications Sheet.

CR6-Series Data loggers

  • CPU: 32 bit with hardware FPU, running at 100 MHz
  • Internal Memory: 4 MB SRAM for data storage, 1 MB flash for program, 6 MB for OS
  • Micro SD Drive for extended data storage up to 16 GB
  • Clock Accuracy: ±3 min per year, optional GPS correction to 10 µs
  • USB micro B for direct connection to PC (limited power source during configuration), 2.0 full speed, 12 Mbps
  • 10/100 Ethernet RJ-45 for LAN connection
  • CS I/O port for connection to Campbell Scientific modems and displays
  • CPI port for terminal expansion using Campbell Distributed modules (CDM)
  • Battery terminal pair for regulated 12 V power input or rechargeable 12 V VRLA (valve-regulated, lead-acid) for UPS mode, 2.5 A @ 20°C
  • Charge terminal pair for 16 to 32 V from dc power converter or 12 or 24 V solar panel,
    1.2 A @ 20°C
  • Two switched 12 V terminals for powering sensors or communication devices, 1.1 A @ 20°C
  • Continuous 12 V terminal
  • Best Analog Accuracy: ±(0.04% of reading + 2 µV), 0° to 40°C
  • Best Effective Resolution: 50 nV (±200 mV range, differential measurement, input reversal, 5 Hz fN1)
  • Weight: 0.42 kg (0.92 lb)
  • Dimensions: 20.3 x 10.2 x 6.1 cm (8.0 x 4.0 x 2.4 in)
  • CE approved

Temperature Range

  • Standard: -40° to +70°C
  • Extended: -55° to +85°C (not available for CR6-WIFI and CR6-RF451)

Twelve Universal (U) Terminals

U terminals are software configurable for analog or digital functions.

  • Analog functions consist of:
    • Analog inputs: 12 single-ended or 6 differential with ±5000 mV, ±1000 mV, ±200 mV ranges 24 bit ADC
    • Analog outputs: ±2.5 V or ±2.5 mA ranges for bridge measurements 12 bit DAC
    • Static frequency-analyzed vibrating wire: terminal pair both excites to 12 V p-p and 100 Hz to 6.5 kHz and reads vibrating-wire transducers using our patented spectral-analysis technology (VSPECT™)
    • Thermistor: completion resistor internal 5 kΩ
    • Period average: up to 200 kHz, amplitude dependent
    • Low level ac: 1 Hz to 20 kHz, amplitude dependent
  • Digital I/O functions consist of 5 V or 3.3 V logic levels for:
    • General status/control
    • Voltage source 5 V, 3.3 V, 20 mA @ 3.5 V
    • Timer I/O
    • Switch closure (150 Hz) or high frequency counter (1 MHz)
    • Pulse width modulation
    • Interrupts
    • SDI-12 and SDM
    • Serial asynchronous communication Tx/Rx pairs

Four control (C) Terminals

C terminals are software configurable for digital functions. Digital I/O functions consist of 5 or 3.3 V logic levels for:

  • General status/control
  • Voltage source 5 V, 3.3 V: 10 mA @ 3.5 V
  • Timer I/O
  • Switched closure (150 Hz) or high frequency counter (1 MHz)
  • Pulse width modulation
  • Interrupts
  • SDI-12 and SDM
  • RS-232/RS-485: half or full duplex, Tx/Rx pairs

CR6-WIFI Option

Wireless Local Area Network (WLAN)

  • Supported Technologies: 802.11 b/g/n, WPA/WPA2-Personal, WPA/WPA2-Enterprise Security, WEP
  • Client Mode: WPA/WPA2-Personal and Enterprise, WEP
  • Access Point Mode: WPA2-Personal
  • Communication Rate
    • 802.11b: up to 11 Mbps
    • 802.11g: up to 54 Mbps
    • 802.11n: up to 72 Mbps
  • Frequency: 2.4 GHz
  • Antenna Connector: RPSMA
  • Antenna: pn 16005 unity gain (0dBd), 1/2 wave whip, omnidirectional. Features an articulating knuckle joint for vertical or horizontal orientation.
  • Transmit Power: 7 to 18 dBm (5 to 63 mW)
  • Rx Sensitivity: -97 dBm

WLAN Power Requirements (@ 12 Vdc)

  • Client Mode: 7 mA idle, 70 mA communicating
  • Access Point Mode: 62 mA idle, 65 mA communicating
  • Sleep (disabled using IPNetPower() or DevConfig setting): < 0.1 mA


Note: The user is responsible for emissions if changing the antenna type or increasing the gain.

  • FCC ID: XF6-RS9113SB
  • IC ID: 8407A-RS9113SB
  • ETSI



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.7 (5.91 MB) 18-10-2017

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.2.16 (46.3 MB) 18-08-2017

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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