CR350 Measurement and Control Datalogger
Compact Data Logger with RS-485
Ideal for small applications
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications

Overview

The CR350 is a multi-purpose, extremely low power, compact measurement and control data logger. This entry-level data logger, with its rich instruction set, can measure most hydrological, meteorological, environmental, and industrial sensors. The CR350 concentrates data, makes it available over varied networks, and delivers it using your preferred protocol. The CR350 also performs automated on-site or remote decision-making for control and M2M communications. This data logger is ideal for small applications requiring long-term, remote monitoring and control.

The following outlines the primary differences between the CR300, CR310, and CR350 dataloggers:

  • The CR310 and CR350 offer removable connectors.
  • The CR310 includes a 10/100 Ethernet connection.
  • The CR350 has two independent RS-232/RS-485 ports and USB-C.

The CR350 includes Wi-Fi, cellular, or the following radio options for different regions:

  • CR350-RF407: US and Canada
  • CR350-RF412: Australia and New Zealand
  • CR350-RF422: Europe
  • CR350-RF427: Brazil

Note: Campbell Scientific does not recommend the CR350 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.

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Benefits and Features

  • Two dedicated SDI-12 terminals to expand SDI-12 sensor use
  • Extremely low current requirements
  • Two dedicated RS-232/RS-485 terminals to support smart sensors or modems
  • Easy setup with PC software and USB-C connectivity
  • Ability to measure analog and digital sensors with confidence
  • Trusted Campbell Scientific quality, including integral surge and ESD protection
  • Integrated radio option to network wirelessly to another node or Internet gateway
  • CR350-WIFI ideal for short-range, wireless IP communication
  • Removable terminal block for easy wiring
  • Ability to communicate anywhere using built-in cellular or satellite peripherals
  • Integrated 12 V battery solar charge regulator to charge batteries
  • Flexibility to connect with PakBus, Modbus, DNP3, GOES, and other standard communication protocols
  • Multiple general-purpose I/O and programmability to analyze and control measurement acquisition
  • Event-driven communications and physical outputs for notifications

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Detailed Description

The CR350 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.

Terminal Descriptions

  • Two switched 12 V terminals (SW12V) for powering sensors or communication devices, 2100 mA 
  • Two sensor excitation or continuous 0.15 to 5 V terminals (VX1, VX2) for sensor excitation or output control
  • Four multipurpose analog input terminals (SE1–SE4)
    • Analog functions (SE1–SE4)
      • Analog inputs: 4 single-ended or 2 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

Specifications

Operating Temperature Range
  • -40° to +70°C
  • Non-condensing environment
Maximum Scan Rate 10 Hz
Case Material High-impact-resistant polycarbonate, recycle code 7
Analog Inputs 4 single-ended or 2 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 Type C 2.0
  • RS-232
  • RS-485
Switched 12 Volt 2 terminals
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: C2 and P_SW don’t do pulse-width modulation.
Analog 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 1.1 A maximum for power converter or solar panel input.)
Real-Time Clock Accuracy ±3 min. per year
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, MQTT(S)
Communication Protocols PakBus, PakBus Encryption, Modbus RTU/ASCII/TCP, DNP3, SDI-12, and others
CPU Drive/Programs 50 MB serial flash
Data Storage 50 MB serial flash
Idle Current Drain, Average 0.5 mA (@ 12 Vdc)
Active Current Drain, Average
  • < 1.5 mA (@ 12 Vdc for 1 Hz scan with 1 analog measurement)
  • 8 mA (@ 12 Vdc with processor always on)
Dimensions 16.3 x 8.4 x 5.6 cm (6.4 x 3.3 x 2.2 in.)
Additional clearance required for cables and leads.
Weight 288 to 306 g (0.64 to 0.68 lb) depending on communication option selected

CR350-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)

CR350-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)

CR350-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

CR350-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)

CR350-RF452 Option
Radio Type Frequency Hopping Spread Spectrum (FHSS)
Output Power 10 mW to 1,000 mW (user-selectable)
Frequency 902 to 928 MHz
RF Data Rate 115.2 or 153.6 kbps
Receive Sensitivity
  • -108 dBm (@ 115.2 kbps for 10-4 BER
  • -103 dBm (@ 153.6 kbps for 10-4 BER
Antenna Connector RPSMA (External antenna required)
Idle Current Drain, Average < 29 mA (maximum @ 12 Vdc)
Active Current Drain, Average < 84 mA (maximum @ 12 Vdc)

CR350-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)

CR350-CELL205 Option
-NOTE- The CR350-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/cr350 for Campbell Scientific antennas.)
Power Consumption - Idle 14 mA (average)
Power Consumption - Active 75 mA (average)
SIM Interface 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V
Radio Output Power
  • 23 dBm on LTE
  • 24 dBm on UMTS
  • 27 dBm on EDGE
  • 33 dBm on GSM
Radio Sensitivity Range -99.5 to 110.5 dBm (10 M)

CR350-CELL210 Option
-NOTE- The CR350-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/cr350 for Campbell Scientific antennas.)
Power Consumption - Low Power Mode 5 mA
Power Consumption - Idle 28 mA (average)
Power Consumption - Active 90 mA (average)
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)

CR350-CELL215 Option
-NOTE- The CR350-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/cr350 for Campbell Scientific antennas.)
Power Consumption - Idle 14 mA (average)
Power Consumption - Active 75 mA (average)
SIM Interface 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V
Radio Output Power
  • 23 dBm on LTE
  • 24 dBm on UMTS
  • 27 dBm on EDGE
  • 33 dBm on GSM
Radio Sensitivity Range -99.5 to 110.5 dBm (10 M)

CR350-CELL220 Option
-NOTE- The CR350-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/cr350 for Campbell Scientific antennas.)
Power Consumption - Idle 14 mA (average)
Power Consumption - Active 75 mA (average)
SIM Interface 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V
Radio Output Power
  • 23 dBm on LTE
  • 24 dBm on UMTS
Radio Sensitivity Range -99.5 to 110.5 dBm (10 M)

CR350-CELL225 Option
-NOTE- The CR350-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/cr350 for Campbell Scientific antennas.)
Power Consumption - Idle 14 mA (average)
Power Consumption - Active 75 mA (average)
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)

CR350-CELL230 Option
Cell Technologies LTE-Cat M, NB-IoT
Frequency Bands
  • LTE M B1/B2/B3/B4/B5/B8/ B12/B13/B18/B19/ B20/B25/B26/B27/B28/B66/B85
  • LTE NB-IoT B1/B2/B3/B4/B5/B8/ B12/B13/B18/B19/ B20/B25/B28/B66/B71/B85
Antenna Connector SMA (External antenna required; see www.campbellsci.com/order/cr350 for Campbell Scientific antennas.)
Power Consumption - Idle 23 mA average (26 mA if GPS is on)
Power Consumption - Active 50 mA average (53 mA if GPS is on)
SIM Interface 3FF (6 position/contacts)
Supports SIMs that require 1.8 or 3 V

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Software

Product Compatible Note
DevConfig Version 2.26 or higher
LoggerLink Version 1.5 or higher
LoggerNet Version 4.7 or higher
LoggerNet Mobile Connect Version 1.1 or higher
PC400 Version 4.7 or higher
RTDAQ
Short Cut Version 4.4 or higher

Additional Compatibility Information

Sensors

With several channel types, the CR350 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. CR350 dataloggers are not capable of applying reverse excitation, and they cannot be used with some conductivity or soil matric potential sensors.

SDI-12, Modbus, and other serial sensors are supported with the RS-232 port and C1 and C2 as a Tx/Rx pair. The CR350 also supports true RS-232 and RS-485 on COM2 and COM3, along with a dedicated RS-232 DB9 port.

Measurement & Control Peripherals

The CR350 is compatible with low current and voltage solid-state relays but not with SDM or CDM devices.

Software

The CR350 series is compatible with CRBasic (version 3.6 or higher).

Enclosures

An ENC10/12 or ENC12/14 enclosure is adequate for most CR350-based systems.

Communications

The CR350 can communicate with a PC directly via its USB port. Compatible telemetry devices include our RS-485 converters, digital cellular gateways, RF telemetry, and satellite transmitters (HDR GOES, Argos, Meteosat, Iridium, and Inmarsat). Data can be viewed on an iOS or Android device (requires our free LoggerLink app), CD295 DataView II Display, or other third-party devices.

Data Logger Option Communications Type Integrated Communications Are Compatible with

CR350-WIFI

2.4 GHz, 20 MHz bandwidth

Most other Wi-Fi devices, such as the CR310-WIFI, CR300-WIFI, CR6-WIFI, NL240

CR350-RF407

902 to 928 MHz Frequency Hopping Spread Spectrum

RF407, CR6-RF407, CRVW3-RF407

CR350-RF412

915 to 928 MHz Frequency Hopping Spread Spectrum

RF412, CR6-RF412, CRVW3-RF412

CR350-RF422

868 MHz SRD860 LBT+AFA

RF422, CR6-RF422, CRVW3-RF422

CR350-CELL

2G Frequency Bands 850, 900, 1800, 1900

3G/4G Frequency Bands 800, 850, 900, 1900, 2100

GSM/GPRS/EDGE (2G)

UMTS/HSPA+ (3G)

LTE (4G)

Power

The CR350 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
  • Charge 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)

Videos & Tutorials

Downloads

CR350 OS v.01.05 (5.00 MB) 21-02-2024

This download is for the CR350 datalogger. 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 fixes issues related to the TX325/TX326, SDI12Recorder and MQTT along with other fixes and new features. 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.

View Update History

Data Logger Wiring Excel Template (1 KB) 26-03-2024

This 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. 

Frequently Asked Questions

Number of FAQs related to CR350: 1