CR310 Datalogger with Ethernet
Compact Datalogger with Ethernet
Ideal for small applications
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications


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:

  • CR310-RF407: US and Canada
  • CR310-RF412: Australia and New Zealand
  • CR310-RF422: Europe
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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
CR310 front view
CR310 front view
CR310 datalogger with Ships With items
CR310 glam view
CR310 front view
CR310 front tilt view
CR310 front tilt view
CR310 back view
CR310 left view (no radio)
CR310 (with radio) left view
CR310 right view (no radio)
CR310 (with radio) right view
CR310 top view (no radio)
CR310 (with radio) top view
CR310 bottom view (no radio)
CR310 (with radio) bottom view
CR310-RF407 glam view
CR310-RF407 front view
CR310-RF412 front view
CR310-RF422 glam view
CR310-RF422 front view
CR310-WIFI glam view
CR310-WIFI front view
CR310-WIFI with attached antenna
CR310-CELL200 front tilt view
CR310-CELL200 front view
CR310-CELL200 front tilt view
CR310-CELL200 with Ships With items

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- Additional specifications are listed in the CR300-Series Specifications Sheet.
Operating Temperature Range -40° to +70°C (standard)
Analog Inputs 6 single-ended or 3 differential (individually configured)
Pulse Counters 8 (P_SW, P_LL, C1, C2, and SE1 to SE4)
Voltage Excitation Terminals 2 (VX1, VX2)
Communications Ports
  • USB Micro B
  • RS-232
  • 10/100 Ethernet RJ45
Switched 12 Volt 1 terminal
Digital I/O 7 terminals (C1, C2, P_SW, and SE1 to SE4) configurable for digital input and output. Includes status high/low, pulse width modulation, external interrupt, and communication functions.
Input Limits -100 mV to +2500 mV
Analog Voltage Accuracy
  • Accuracy specifications do not include sensor or measurement noise.
  • ±(0.04% of measurement + offset) at 0° to 40°C
  • ±(0.1% of measurement + offset) at -40° to +70°C
ADC 24-bit
Power Requirements 10 to 18 Vdc; 16 to 32 Vdc
Real-Time Clock Accuracy ±1 min. per month
Internet Protocols Ethernet, PPP, RNDIS, ICMP/Ping, Auto-IP(APIPA), IPv4, IPv6, UDP, TCP, TLS, DNS, DHCP, SLAAC, 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 80 MB serial flash
Data Storage 30 MB serial flash
Idle Current Drain, Average 32 mA (@ 12 Vdc with Ethernet link idle)
Active Current Drain, Average 23 mA + 51 mA (@ 12 Vdc with Ethernet link active, processor always on)
Dimensions 16.2 x 7.62 x 5.68 cm (6.4 x 3.0 x 2.2 in.)
Weight 288 to 306 g (0.64 to 0.68 lb) depending on communication option selected

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)
RF Data Rate 200 kbps
Receive Sensitivity -101 dBm
Antenna Connector RPSMA (external antenna required; see for Campbell Scientific antennas)
Idle Current Drain, Average 12 mA (@ 12 Vdc)
Active Current Drain, Average < 80 mA (@ 12 Vdc)

CR310-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)
Idle Current Drain, Average 12 mA (@ 12 Vdc)
Active Current Drain, Average < 80 mA (@ 12 Vdc)

CR310-RF422 Option

Radio Type F868 MHz SRD 860 with Listen Before Talk (LBT) and Automatic Frequency Agility (AFA)
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 (External antenna required; see for Campbell Scientific antennas.)
Idle Current Drain, Average 9.5 mA
Active Current Drain, Average 20 mA

CR310-WIFI Option

Operational Modes Client or Access Point
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)

CR310-CELL200 Option

-NOTE- The CR310-CELL200 option is not compatible with a Verizon cellular network.
Cell Technologies
  • 3G (UMTS/HSPA+)
2G Frequency Bands 850, 900, 1800, and 1900 MHz
3G Frequency Bands 800, 850, 900, 1900, and 2100 MHz
Antenna Connector SMA (External antenna required; see for Campbell Scientific antennas.)

CR310-CELL205 Option

-NOTE- The CR310-CELL205 option is not compatible with a Verizon cellular network.
Cell Technologies
  • 3G (UMTS/HSPA+)
  • 4G (LTE CAT-1)
3G Frequency Bands 850, 1700/2100 (AWS), and 1900
4G Frequency Bands 700, 850, 1700/2100 (AWS-1), 1900
Antenna Connector SMA (External antenna required; see for Campbell Scientific antennas.)


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 RS-232 port and C1 and C2 as a Tx/Rx pair. The CR300 does not directly support RS-485 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 Communications Type Integrated Communications Are 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


915 to 928 MHz Frequency Hopping Spread Spectrum

RF412, CR6-RF412, CRVW3-RF412


868 MHz SRD860 LBT+AFA

RF422, CR6-RF422, CRVW3-RF422


2G Frequency Bands 850, 900, 1800, 1900

3G Frequency Bands 800, 850, 900, 1900, 2100




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 Series OS v.7.0 (5.17 MB) 02-12-2018

This download is for the CR300 series of dataloggers including all CR300 and CR310 models. Execution of this download installs the CR300 series Operating System and Compiler on your computer.  It also updates the CR300 series support files for the CRBasic Editor.

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

An issue was found in operating systems previous to 6.0 that could cause the datalogger to become unresponsive in some systems after 50 days. This operating system resolves that issue. It is strongly recommended that all CR300s and CR310s be upgraded to this operating system.

Un problème a été détecté dans les systèmes d'exploitation, ce qui pourrait entraîner un disfonctionnement de la centrale de mesure dans certaines applications après 50 jours. Ce système d'exploitation résout ce problème. Il est fortement recommandé que toutes les CR300 et CR310 soient mises à niveau avec cet OS.

View Update History

CR3xx Wifi OS Update v. (1.87 MB) 12-22-2017

CR3xx Wi-Fi OS update to resolve the KRACK (Key Reinstallation AttaCK) Wi-Fi vulnerability. This download includes the OS and the update procedure.

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

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