CR300
CR300
RetiredMeasurement and Control Datalogger
No longer available to order
This product is retained for service, documentation, and compatibility information.
- Model:
- CR300
- Item Number:
- CR300
- Warranty:
- 3 years
Overview
The CR300 is a multi-purpose, compact measurement and control data logger. This small, low-cost, high-value data logger offers fast communications, low power requirements, built-in USB, and excellent analog input accuracy and resolution. The CR300 can measure most hydrological, meteorological, environmental, and industrial sensors. It concentrates data, makes it available over varied networks, and delivers it using your preferred protocol. It also performs automated on-site or remote decision making for control and M2M communications. The CR300 is ideal for small applications requiring long-term, remote monitoring and control.
The CR300 includes Wi-Fi, cellular, or the following radio options for different regions:
- CR300-RF407: US and Canada
- CR300-RF412: Australia and New Zealand
- CR300-RF422: UK and EU
- CR300-RF427: Brazil
Note: Campbell Scientific does not recommend the CR300 for use as a PakBus router in networks with more than 50 devices. Large arrays or string variables may also reach memory limits. For such applications, a CR1000X Measurement and Control Datalogger is recommended.
Key Advantages
Ideal for small applications
Technical Description
The CR300 is a low-powered data logger designed to measure sensors, analyze data, and store data and programs. A battery-backed clock assures accurate timekeeping. The on-board, BASIC-like programming language—common to all Campbell Scientific data loggers—supports data processing and analysis routines.
The CR300 wiring panel includes a switchable 12 V terminal, and analog grounds dispersed among six analog terminals.
Benefits
- Connects directly to a computer's USB port
- Differentiates even slight changes in data values with higher resolutions measurements (24 bit Adc)
- Provides simple serial sensor integration and measurement with SDI-12 and/or RS-232
- Supports full PakBus networking
- Includes embedded web page for direct connection via web browser
Specifications
- -NOTE-
- Additional specifications are listed in the CR300-Series Specifications Sheet.
- Operating Temperature Range
- -40° to +70°C
(standard)
Non-condensing environment - Maximum Scan Rate
- 10 Hz
- Case Material
- Powder-coated aluminum
- 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 BRS-232
- 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. Exception: The SE4 terminal doesn't do external interrupt.
- Input Limits
- -100 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
- 16 to 32 Vdc for charger input (CHG)
(Current limited to 0.9 A maximum for power converter or solar panel input.)
10 to 18 Vdc for external batteries (BAT) - Real-Time Clock Accuracy
- ±1 min. per month
- Internet Protocols
- Ethernet, PPP, RNDIS, ICMP/Ping, Auto-IP(APIPA), IPv4, IPv6, UDP, TCP, TLS (v1.2), DNS, DHCP, SLAAC, NTP, Telnet, HTTP(S), FTP(S), SMTP/TLS, POP3/TLS
- Communications Protocols
- PakBus, Modbus, DNP3, SDI-12, TCP, UDP, and others
- CPU Drive/Programs
- 80 MB serial flash
- Data Storage
- 30 MB serial flash
- Idle Current Drain, Average
- 1.5 mA
(@ 12 Vdc)
- Active Current Drain, Average
- 5 mA
(@ 12 Vdc for 1 Hz scan with 1 analog measurement)
23 mA(@ 12 Vdc with processor always on)
- Dimensions
- 13.97 x 7.62 x 4.56 cm
(5.5 x 3.0 x 1.8 in.)
Additional clearance required for cables and leads. - Weight
- 242 to 250 g
(0.53 to 0.55 lb) depending on communication option selected
CR300-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 www.campbellsci.com/order/rf407 for Campbell Scientific antennas.)
- Idle Current Drain, Average
- 12 mA
(@ 12 Vdc)
- Active Current Drain, Average
- < 80 mA
(@ 12 Vdc)
CR300-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 www.campbellsci.com/order/rf412 for Campbell Scientific antennas.)
- Idle Current Drain, Average
- 12 mA
(@ 12 Vdc)
- Active Current Drain, Average
- < 80 mA
(@ 12 Vdc)
CR300-RF422 Option
- Radio Type
- 868 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
- RPSMA
(External antenna required; see www.campbellsci.com/order/rf422 for Campbell Scientific antennas.)
- Idle Current Drain, Average
- 9.5 mA
- Active Current Drain, Average
- 20 mA
CR300-RF427 Option
- Radio Type
- Frequency Hopping Spread Spectrum
(FHSS)
- Output Power
- 5 to 250 mW
(user-selectable)
- Frequency
- 902 to 907.5 MHz/915 to 928 MHz
(Brazil)
- RF Data Rate
- 200 kbps
- Receive Sensitivity
- –101 dBm
- Antenna Connector
- RPSMA
(External antenna required.)
- Idle Current Drain, Average
- 12 mA
(@ 12 Vdc)
- Active Current Drain, Average
- < 80 mA
(@ 12 Vdc)
CR300-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)
CR300-CELL205 Option
- -NOTE-
- The CR300-CELL205 option is not compatible with a Verizon cellular network.
- Certifications
- IC (Industry Canada)
10224A-201611EC21A
- 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 www.campbellsci.com/order/cr300 for Campbell Scientific antennas.)
- SIM Interface
- 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V. - Radio Output Power
- 23 dBm on LTE24 dBm on UMTS27 dBm on EDGE33 dBm on GSM
- Radio Sensitivity Range
- -99.5 to 110.5 dBm
(10 M)
CR300-CELL210 Option
- -NOTE-
- The CR300-CELL210 option is only compatible with a Verizon cellular network.
- Cell Technologies
- 4G
(LTE CAT-1)
- 4G Frequency Bands
- 700, 850, 1700, 1900, 2100
- Antenna Connector
- SMA
(External antenna required; see www.campbellsci.com/order/cr300 for Campbell Scientific antennas.)
- Power Consumption - Low Power Mode
- 5 mA
- Power Consumption - Idle
- 35 mA
- Power Consumption - Active
- 70 mA
- SIM Interface
- 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V. - Radio Output Power
- 23 dBm on LTE
- Radio Sensitivity Range
- -99.5 to 110.5 dBm
(10 M)
CR300-CELL215 Option
- -NOTE-
- The CR300-CELL215 option is intended for use in EMEA countries.
- Cell Technologies
- 2G
(GSM/GPRS/EDGE)
3G(UMTS/HSPA+)
4G(LTE CAT-1)
- 2G Frequency Bands
- 900 and 1800 MHz
- 3G Frequency Bands
- 850, 900, and 2100 MHz
- 4G Frequency Bands
- 800, 850, 900, 1800, 2100, and 2600 MHz
- Antenna Connector
- SMA
(External antenna required; see www.campbellsci.com/order/cr300 for Campbell Scientific antennas.)
- SIM Interface
- 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V. - Radio Output Power
- 23 dBm on LTE24 dBm on UMTS27 dBm on EDGE33 dBm on GSM
- Radio Sensitivity Range
- -99.5 to 110.5 dBm
(10 M)
CR300-CELL220 Option
- -NOTE-
- The CR300-CELL220 option is intended for use in Australia and New Zealand.
- Cell Technologies
- 3G
(UMTS/HSPA+)
4G(LTE CAT-1)
- 3G Frequency Bands
- 850 and 2100 MHz
(EC-21AUT)
850, 900, 1900, and 2100 MHz(EC-21AU)
- 4G Frequency Bands
- 700, 850, 1800, 2100, and 2600 MHz
(EC-21AUT)
700, 900, 1700, 1800, 1900, 2100, and 2600 MHz(EC-21AU)
- Antenna Connector
- SMA
(External antenna required; see www.campbellsci.com/order/cr300 for Campbell Scientific antennas.)
- SIM Interface
- 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V. - Radio Output Power
- 23 dBm on LTE24 dBm on UMTS
- Radio Sensitivity Range
- -99.5 to 110.5 dBm
(10 M)
CR300-CELL225 Option
- -NOTE-
- The CR300-CELL225 option is intended for use in Japan.
- Cell Technologies
- 4G
(LTE CAT-1)
- 4G Frequency Bands
- 800 (lower), 800 (upper), 850+, 900, 1800, and 2100 MHz
- Antenna Connector
- SMA
(External antenna required; see www.campbellsci.com/order/cr300 for Campbell Scientific antennas.)
- SIM Interface
- 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V. - Radio Output Power
- 23 dBm on LTE
- Radio Sensitivity Range
- -99.5 to 110.5 dBm
(10 M)
Accessories
(16)CELLDATA
Campbell Scientific Cellular Data Service Subscription
Orderable32256
4G/3G Cellular Whip Antenna with SMA Connector
Orderable32262
2 dBd 4G/3G Multiband Omnidirectional Antenna with Mounting Hardware
Orderable14204
900 MHz 0 dBd 1/2 Wave Omnidirectional Antenna with RPSMA Connector
Orderable14221
900 MHz 3 dBd Omnidirectional Antenna with Mounting Hardware
Orderable14201
900 MHz 9 dBd Yagi Antenna with Mounting Hardware
Orderable38485
4G/3G 9 dBi MIMO Cellular Antenna with 2 Type N Socket Connectors
Orderable15730
900 MHz 0 dBd 1/4 Wave Omnidirectional Antenna with RPSMA Connector
Orderable15731
900 MHz 0 dBd 1/4 Wave Omnidirectional Antenna with RPSMA Connector
Orderable17480
Tri-Band 1 dBd Omnidirectional Antenna with RPSMA Connector and Adhesive Mount
Limited availability30411
2.4 GHz 5.8 dBd Omnidirectional Fiberglass Antenna without Mounting Hardware
Orderable16755
2.4 GHz 13 dBd Yagi Enclosed Antenna with Mounting Hardware
Orderable27373
14 to 28 AWG 5-Position Terminal Connector with Lever Nut
Orderable10873
Serial Data Cable, 9-Pin Socket (Female) to 9-Pin Pin (Male)
Orderable18663
Null Modem Cable, 9-Pin PIn (Male) to 9-Pin Pin (Male)
Orderable39177
1.67 A 24 Vdc Power Supply
Orderable
Ships With
(7)- QuickStart URL card
505
Screw #6-32 x .375 Pan Phillips
OrderableQty 36044
Grommet for #6 or #8 Screw
OrderableQty 327555
USB 2.0 Cable, Type A Pin (Male) to Micro B Pin (Male), 6/6.5 ft
Orderable3315
Type T Thermocouple
Orderable16005
2.4 GHz 0 dBd Omnidirectional 1/2 Wave Whip Antenna
Orderable7363
Enclosure Supply Kit, Standard Size
Orderable
Related Resources
Case Studies

South Dakota: Rock-Melt Monitoring
Monitoring research using resistive heater to seal boreholes
South Dakota, USA
July 18, 2018
View
Wyoming: Landslide Warning
Landslide warning system
Northeastern Wyoming, USA
March 2, 2018
View
Ontario: Road Weather Network
Adding stations to RWIS in sparsely populated area
Ontario, Canada
July 9, 2019
View
Canada: Structural Health Monitoring of an Overpass
Canada
May 6, 2020
View
Showing 4 of 11 results
See all Case StudiesDocuments
- Manual
CR300 Series Product Manual (PDF)
April 2026
View Document - Manual
CR300 Series Getting Started Guide (PDF)
June 2023
View Document - Technical Paper
Data Streaming
July 2023
View Document - Brochure
CR300-Series Specifications Sheet
May 2026
View Document
Showing 4 of 36 results
See all DocumentsDownloads
- CR300 QuickStart ProgramLogin required
March 15, 2016
Software ApplicationsThe CRBasic program referenced in the CR300 QuickStart videos and manual.
- CR300 Series OSv11.03.00Login required
December 23, 2025
OS and FirmwareThis download is for the CR300 series of dataloggers including all CR300 and CR310 models. Execution of this download places the Operating System file(.obj) on your computer. It also updates the CRBasic Editor compiler and support files. Why Update? This OS has general bug fixes. See the revision history for a complete list. 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/Warning: 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.
- CR300 Series Wifi OS Updatev1.7.12Login required
January 1, 1990
OS and FirmwareManufacturer chipset maintenance update.
- Data Logger Wiring Excel Template
March 26, 2024
Software ApplicationsThis is a data logger wiring diagram spreadsheet template that accompanies the Wiring Diagram Video. The spreadsheet includes templates for CR6, CR1000X, CR300, CR310, and CR350 data loggers. The file is an Excel template and works best with Microsoft Excel.
Videos and Tutorials

LoggerLink Software | An Introduction
January 29, 2013 (12:11)
A mobile app for iOS and Android
Watch
LoggerNet Software | Network Planner
April 16, 2013 (4:05)
Designing a PakBus™ network using the Network Planner tool in LoggerNet
Watch
Toolbox for Installation and Maintenance
November 5, 2013 (2:21)
Helpful toolbox items for use in the field
Watch
SDI-12 Sensors | Transparent Mode
November 27, 2013 (7:06)
Communicating with an SDI-12 sensor
Watch
Showing 4 of 61 results
See all Videos and TutorialsPress Releases
Services Available
- Repair
- Yes
- Free Support
- Yes