Compact Datalogger with Ethernet
Ideal for small applications
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The CR310 is a multi-purpose, compact, low-cost measurement and control datalogger that includes an integrated 10/100 Ethernet port and removable terminal connectors. This entry-level datalogger, with its rich instruction set, can measure most hydrological, meteorological, environmental, and industrial sensors. It will concentrate data, making it available over varied networks and deliver it using your preferred protocol. The CR310 also performs automated on-site or remote decision making for control and M2M communications. The CR310 is ideal for small applications requiring long-term, remote monitoring and control.

The primary differences between the CR300 and CR310 are that the CR310 offers removable connectors and a 10/100 Ethernet connection.

The CR310 has multiple radio options that are suitable for different regions. In Canada, the CR310-RF407 is available. The CR310-WIFI is also available in Canada.

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Benefits and Features

  • Set up easily with PC software and USB connectivity
  • Measure with confidence analog and digital sensors
  • Internet ready–email, FTP, HTTP/web, TCP–with required add-ons
  • Trust in the Campbell Scientific quality, including integral surge and ESD protection
  • Save money and space using the integrated Ethernet port
  • Network wirelessly to another node or Internet gateway with integrated radio option
  • CR310-WIFI ideal for short-range, wireless IP communication
  • Wiring made easy through removable terminal block
  • Communicate from anywhere when using cellular or satellite peripheral
  • Charge batteries using the integrated 12 V battery solar charge regulator
  • Measure smart sensors using RS-232 or SDI-12
  • Connect with PakBus, Modbus, DNP3, GOES, and other standard communication protocols
  • Analyze and control with programmability and multiple general purpose I/O
  • Notify with event-driven communications and physical outputs


CR310 front view

Detailed Description

Terminal Descriptions

  • One switched 12 V terminal (SW12V) for powering sensors or communication devices, 1100 mA @ 20°C 
  • Two sensor excitation or continuous 0.15 to 5 V terminals (VX1, VX2) for sensor excitation or output control
  • Six multipurpose analog input terminals (SE1 - SE6)
    • Analog functions (SE1 - SE6)
      • Analog inputs: 6 single-ended or 3 differential inputs with -100 to +2500 mV and ±34 mV ranges 24 bit ADC
      • 4 to 20 mA or 0 to 20 mA inputs (SE1, SE2 only)
    • Digital I/O functions (SE1 - SE4) consist of 3.3 V logic levels for:
      • High frequency counter (35 kHz)
      • Pulse width modulation
      • Interrupts and timer input
      • Period average (200 kHz, amplitude dependent)
  • Two Pulse Counting Terminals (P_SW, P_LL)
    • P_SW
      • Switch closure (150 Hz)
      • High frequency counter (35 kHz)
    • P_LL
      • Low level ac (20 kHz)
      • High frequency counter (20 kHz)
  • Two Control Terminals (C1, C2): C terminals are software configurable for digital functions
    • Digital I/O functions consist of 5 V output and 3.3 V input logic levels for:
      • SDI-12
      • High frequency counter (3 kHz)
      • Switch closure (150 Hz)
      • General status/control
      • Voltage source 5 V: 10 mA @ 3.5 V
      • Interrupts
      • Serial asynchronous communication Tx/Rx pair


-NOTE- Note: Additional specifications are listed in the CR310-Series Specifications Sheet.
CPU ARM Cortex M4, running at 144 MHz
Internal Memory
  • 30 MB flash for data storage
  • 80 MB flash for CPU drive / programs
  • 2 MB flash for operating system
Clock Accuracy ±1 min per month
USB Micro B For direct connection to PC (limited power source during configuration), 2.0 full speed, 12 Mbps
10/100 Ethernet RJ45 For LAN connection
RS-232 For connecting RS-232 modems or serial sensors
Battery Terminal Pair (-BAT+) For regulated 12 V power input or rechargeable 12 V VRLA for UPS mode
Charge Terminal Pair (-CHG+) For 16 to 32 V from dc power converter or 12 or 24 V solar panel (10 W)
Power Consumption @ 12 Vdc
  • 1.5 mA (sleep)
  • 5 mA (1 Hz scan with one analog measurement)
  • 23 mA (active processor always on)
  • 32 mA (Ethernet idle)
  • 51 mA (Ethernet active)
Best Analog Accuracy ±(0.04% of reading ± 6 µV) at 0° to 40°C
Best Effective Resolution 0.23 μV (±34 mV range, differential measurement, input reversal, 50/60 Hz fN1)
Operating Temperature Range -40° to +70°C
Compliance Information View the compliance information in the Documents section of the web page.
Box Dimensions 16.9 x 8.8 x 8.3 cm (6.6 x 3.5 x 3.3 in.)
Dimensions 16.2 x 7.6 x 5.7 cm (6.4 x 3.0 x 2.3 in.)
Boxed Weight 396 g (0.87 lb)
Weight 288 g (0.64 lb)

CR310-RF407 Option

Radio Type Frequency Hopping Spread Spectrum (FHSS)
Output Power 5 to 250 mW (user-selectable)
Frequency 902 to 928 MHz (US, Canada)
Channel Capacity Eight 25-channel hop sequences sharing 64 available channels
RF Data Rate 200 kbps
Receive Sensitivity -101 dBm
Antenna Connector RPSMA (external antenna required; see for Campbell Scientific antennas)
Average Additional Current Contribution @ 12 Vdc
  • 45 mA (transmit)
  • 12 mA (idle on)
  • 4 mA (idle 0.5 s power mode)
  • 3 mA (idle 1 s power mode)
  • 1.5 mA (idle 4 s power mode)
Compliance Information
  • MCQ-XB900HP (United States FCC Part 15.247)
  • 1846A-XB900HP (Industry Canada [IC])
Boxed Weight 415 g (0.91 lb)
Weight 306 g (0.68 lb)

CR310-WIFI Option

Operational Modes Client or Access Point
Supported Standards IEEE 802.11 b/g/n, IEEE 802.11d/e/i, 802.1X, WEP, WPA/WPA2-Personal and Enterprise
Maximum Possible Over-the-Air Data Rates
  • Up to 11 Mbps (802.11b)
  • Up to 54 Mbps (802.11g)
  • Up to 72 Mbps (802.11n)
Operating Frequency 2.4 GHz, 20 MHz bandwidth
Antenna Connector Reverse Polarity SMA (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)
Rx Sensitivity -97 dBm
Average Additional Current Contribution @ 12 Vdc
  • 7 mA (client mode, idle)
  • 70 mA (client mode, communicating)
  • 62 mA (access point mode, idle)
  • 65 mA (access point mode, communicating)
  • < 0.1 mA (sleep, disabled using IPNetPower() or DevConfig setting)
Compliance Information View the compliance information in the Documents section of the web page.
Boxed Weight 415 g (0.91 lb)
Weight 306 g (0.68 lb)


Measurement & Control Peripherals

The CR310 is typically not used with measurement and control peripherals because of its limited number of control ports. It is also compatible with low on current and voltage solid-state relays.

The CR310 is not compatible with SDM or CDM devices.


With several channel types, the CR310 is compatible with nearly every available sensor. This includes analog output voltage (0 to 2.5 V) and current (0 to 20 mA or 4 to 20 mA) sensors, thermistors, and RTDs to name a few. It is also compatible with pulse or frequency output sensors such as anemometers, rain gauges, and flow meters. SDI-12, Modbus, and other serial sensors are supported with the RS232 port and C1 and C2 as a Tx/Rx pair. The CR300 does not directly support RS485 sensors.


The CR310 can communicate with a PC via its USB port. Compatible telemetry devices include our RS-485 converters, digital cellular gateways, RF telemetry, and satellite transmitters. Data can be viewed on an iOS device, an Android device, or CD295 DataView II Display. To use an iOS or Android device, go to the Apple Store or Google Play and download our free LoggerLink Mobile Apps.

Datalogger Option Radio Type Integrated Radio Is Over-the-Air Compatible with


2.4 GHz, 20 MHz bandwidth

Most other Wi-FI devices, such as the CR300-WIFI, CR6-WIFI, NL240


902 to 928 MHz Frequency Hopping Spread Spectrum

RF407, CR6-RF407, CRVW3-RF407


For the CR310 datalogger, compatible software includes:

  • LoggerNet (version 4.4 or higher)
  • DevConfig (version 2.12 or higher)
  • PC400 (version 4.4 or higher)
  • PC200W (version 4.4 or higher)
  • Short Cut (version 3.2 or higher)
  • CRBasic (version 3.6 or higher)
  • LNDB (version 1.3 or higher)
  • LoggerLink (version 1.5 or higher)
  • LoggerNet Mobile Connect (version 1.1 or higher)

The CR310 datalogger is not compatible with:



The CR310 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 (SP10, SP20), or power converter (29796) is used to charge a 12 Vdc battery, such as our BP7 or BP12.
  • 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 the switched battery terminal SW12)


An ENC10/12 or ENC12/14 enclosure is adequate for most CR310-based systems. 


CR300 OS v.5.01 (3.96 MB) 20-01-2017

Execution of this download installs the CR300 Operating System and Compiler on your computer.  It also updates the CR300 support files for the CRBasic Editor.  

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

View Revision History

CR300 QuickStart Program (569 KB) 15-03-2016

The CRBasic program referenced in the CR300 QuickStart videos and manual.