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Campbell Scientific: CR350 Datalogger

Veldig robust og pålitelig datalogger, egnet for vitenskapelige applikasjoner og alle typer feltstasjoner.

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Produktnummer: CS_CR350 Kategori: Stikkord:


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 CR300CR310, 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!


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


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

Technical 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