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CR350 Measurement and Control Datalogger

Updated:2025-03-13

Brand: Campbell
Model: CR350
Description: 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, meteorologic
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Product Details

CR350 Measurement and Control Datalogger Description：

Product Manual Datasheet

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

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

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

CR350 Measurement and Control Datalogger 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;)
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;)
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;)
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-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;)
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;)
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)

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; )
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; )
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;)
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)