Campbell Scientific CR350
The Campbell Scientific CR350 is a compact, extremely low-power measurement and control datalogger. It features four analog inputs, USB-C, two independent RS-232/RS-485 ports, and two dedicated SDI-12 terminals for connecting smart sensors and communication devices.
Campbell Scientific CR350 – Compact Datalogger with RS-485
The Campbell Scientific CR350 is a multipurpose, compact, and extremely low-power measurement and control datalogger. It is designed for small and medium-sized applications requiring reliable long-term operation, remote monitoring, and flexible integration of analog and digital sensors.
The CR350 can measure a wide range of hydrological, meteorological, environmental, geotechnical, and industrial sensors. It processes and stores measurements, performs automated control functions, and transfers data through serial, radio, Wi-Fi, cellular, or satellite communication systems.
The main advantage of the CR350 compared with the CR310 is its two independent RS-232/RS-485 communication ports and USB-C interface. The CR350 does not include an integrated RJ45 Ethernet port, but it is better suited to systems using RS-485 sensors, industrial serial devices, and extremely low-power operation.
Key Benefits
- extremely low power consumption;
- four analog inputs configurable as four single-ended or two differential channels;
- 24-bit analog-to-digital converter;
- two independent RS-232/RS-485 communication ports;
- dedicated RS-232 DB9 communication port;
- USB-C interface for configuration, programming, and local data collection;
- two independent SDI-12 terminals for smart sensors;
- support for 0–20 mA and 4–20 mA signals through the SE1 and SE2 inputs;
- removable terminal connectors for easier wiring and maintenance;
- integrated charge regulator for a 12 V battery and solar panel;
- two switched 12 V outputs for sensors and communication devices;
- integrated surge, electrostatic discharge, over-current, and reverse-polarity protection;
- programmable using CRBasic and configurable using Short Cut;
- available with integrated Wi-Fi, RF422, and 4G communication options.
Measurement Inputs and Control
The CR350 provides four multipurpose analog inputs that can be configured as four single-ended or two differential channels. The inputs support voltage measurements, thermocouples, thermistors, RTDs, current signals, and resistive bridge measurements.
The SE1 and SE2 inputs can directly measure non-isolated 0–20 mA and 4–20 mA current signals. The datalogger also provides pulse inputs, configurable digital inputs and outputs, two programmable voltage excitation terminals, and two switched 12 V outputs.
RS-232, RS-485, and SDI-12 Communication
The CR350 includes two independent COM2 and COM3 communication ports that can operate as RS-232 or half-duplex RS-485 interfaces. This allows direct connection of smart sensors, industrial controllers, Modbus devices, and communication modems without requiring an external RS-485 converter.
The C1 and C2 terminals can operate as two independent SDI-12 ports or as a serial Tx/Rx communication pair. A separate 9-pin RS-232 port is also available for connection to a computer, modem, or other serial device.
USB-C and Remote Access
The USB-C port is used for initial configuration, program transfer, setting changes, and local data collection. It can also operate as a USB host for compatible mass-storage devices.
The CR350 does not include an integrated RJ45 Ethernet port. IP communication can be provided through Ethernet over USB, an integrated Wi-Fi or cellular option, or an external communication gateway. Supported protocols and services include PakBus, Modbus RTU, Modbus ASCII, Modbus TCP, DNP3, MQTT, HTTP, HTTPS, FTP, FTPS, SMTP, and NTP.
Versions for Europe
- CR350 – standard version with USB-C, RS-232, RS-485, and SDI-12;
- CR350-WIFI – version with integrated 2.4 GHz Wi-Fi communication;
- CR350-RF422 – version with integrated 863–870 MHz radio for Europe, the Middle East, and Africa;
- CR350-CELL215 – version with integrated 4G LTE CAT-1 communication for Europe, the Middle East, and Africa.
Learn more about the CELL215.
Applications
The Campbell Scientific CR350 is suitable for:
- geotechnical and structural monitoring;
- monitoring landslides, dams, bridges, and infrastructure facilities;
- meteorological and agrometeorological stations;
- water-resource and hydrological monitoring;
- environmental and soil monitoring;
- water level, flow, rainfall, and water-quality measurement;
- energy and photovoltaic installations;
- industrial RS-485 and Modbus measurement systems;
- autonomous monitoring stations powered by batteries and solar panels.
Compatibility and Programming
The CR350 is programmed using CRBasic and can be configured with Short Cut, Device Configuration Utility, PC400, or LoggerNet. It supports analog, current, pulse, RS-232, RS-485, SDI-12, Modbus, and other serial sensors.
The datalogger is compatible with low-current and low-voltage solid-state relays but is not compatible with SDM or CDM peripheral devices. The CR350 cannot apply reverse excitation, so some specialised conductivity or soil matric potential sensors may not be compatible.
View the other dataloggers for automated monitoring available from Solitech.
| Модел | Campbell Scientific CR350 |
| Тип устройство | Дейталогер за измерване и автоматизирано управление |
| Процесор | ARM Cortex-M4, 120 MHz |
| Памет за програми | 50 MB serial flash |
| Памет за съхранение на данни | 50 MB serial flash |
| Оперативна памет | 7 MB RAM |
| Максимална честота на сканиране | 10 Hz |
| Аналогови входове | 4 еднополюсни или 2 диференциални входа |
| Аналогово-цифров преобразувател | 24-bit ADC |
| Диапазон на аналоговите входове | от –100 до +2500 mV и диапазон ±34 mV |
| Токови сигнали | 0–20 mA или 4–20 mA чрез SE1 и SE2; измервателен диапазон до 25 mA |
| Точност на аналоговото измерване | ±(0.04% от измерването + offset) при 0°C до +40°C |
| Импулсни броячи | 8 |
| Максимална честота на импулсите | до 35 kHz според използвания терминал |
| Цифрови входове и изходи | до 7 програмируеми терминала |
| SDI-12 | 2 независими SDI-12 терминала, C1 и C2 |
| Терминали за възбуждащо напрежение | 2 × VX, програмируеми от 0.15 до 5 V |
| Превключваемо захранване | 2 × SW12V за сензори и комуникационни устройства |
| USB порт | USB Type-C 2.0, до 12 Mbps; device и host режими |
| RS-232 | 9-пинов RS-232 порт, COM1 и два независими COM2/COM3 порта |
| RS-485 | 2 независими полудуплексни RS-485 порта, COM2 и COM3 |
| Ethernet | Ethernet over USB чрез RNDIS; няма вграден RJ45 порт |
| Комуникационни протоколи | PakBus, Modbus RTU, Modbus ASCII, Modbus TCP, DNP3 и SDI-12 |
| Интернет протоколи и услуги | IPv4, IPv6, TCP, UDP, TLS 1.2, HTTP(S), FTP(S), SMTP/TLS, MQTT, DNS, DHCP и NTP |
| Захранване през BAT терминали | 12 V DC |
| Захранване през CHG терминали | 16–32 V DC от захранващ преобразувател или соларен панел |
| Консумация в режим на покой | приблизително 0.5 mA при 12 V DC |
| Консумация при сканиране | приблизително 1.5 mA при 1 Hz сканиране и едно аналогово измерване |
| Консумация при постоянно активен процесор | приблизително 8 mA при 12 V DC |
| Точност на часовника | ±3 минути на година |
| Вътрешна батерия за часовника | CR2032X, приблизителен живот 6 години без външно захранване |
| Работна температура | от –40°C до +70°C, без конденз |
| Материал на корпуса | Удароустойчив поликарбонат |
| Размери | 16.3 × 8.4 × 5.6 cm |
| Тегло | 288 g за стандартния CR350; 306 g за комуникационните варианти |
| Програмиране | CRBasic и Short Cut |
| Препоръчителна рекалибрация | На всеки 3 години |
Campbell Scientific CR350 – Compact Datalogger with RS-485
The Campbell Scientific CR350 is a multipurpose, compact, and extremely low-power measurement and control datalogger. It is designed for small and medium-sized applications requiring reliable long-term operation, remote monitoring, and flexible integration of analog and digital sensors.
The CR350 can measure a wide range of hydrological, meteorological, environmental, geotechnical, and industrial sensors. It processes and stores measurements, performs automated control functions, and transfers data through serial, radio, Wi-Fi, cellular, or satellite communication systems.
The main advantage of the CR350 compared with the CR310 is its two independent RS-232/RS-485 communication ports and USB-C interface. The CR350 does not include an integrated RJ45 Ethernet port, but it is better suited to systems using RS-485 sensors, industrial serial devices, and extremely low-power operation.
Key Benefits
- extremely low power consumption;
- four analog inputs configurable as four single-ended or two differential channels;
- 24-bit analog-to-digital converter;
- two independent RS-232/RS-485 communication ports;
- dedicated RS-232 DB9 communication port;
- USB-C interface for configuration, programming, and local data collection;
- two independent SDI-12 terminals for smart sensors;
- support for 0–20 mA and 4–20 mA signals through the SE1 and SE2 inputs;
- removable terminal connectors for easier wiring and maintenance;
- integrated charge regulator for a 12 V battery and solar panel;
- two switched 12 V outputs for sensors and communication devices;
- integrated surge, electrostatic discharge, over-current, and reverse-polarity protection;
- programmable using CRBasic and configurable using Short Cut;
- available with integrated Wi-Fi, RF422, and 4G communication options.
Measurement Inputs and Control
The CR350 provides four multipurpose analog inputs that can be configured as four single-ended or two differential channels. The inputs support voltage measurements, thermocouples, thermistors, RTDs, current signals, and resistive bridge measurements.
The SE1 and SE2 inputs can directly measure non-isolated 0–20 mA and 4–20 mA current signals. The datalogger also provides pulse inputs, configurable digital inputs and outputs, two programmable voltage excitation terminals, and two switched 12 V outputs.
RS-232, RS-485, and SDI-12 Communication
The CR350 includes two independent COM2 and COM3 communication ports that can operate as RS-232 or half-duplex RS-485 interfaces. This allows direct connection of smart sensors, industrial controllers, Modbus devices, and communication modems without requiring an external RS-485 converter.
The C1 and C2 terminals can operate as two independent SDI-12 ports or as a serial Tx/Rx communication pair. A separate 9-pin RS-232 port is also available for connection to a computer, modem, or other serial device.
USB-C and Remote Access
The USB-C port is used for initial configuration, program transfer, setting changes, and local data collection. It can also operate as a USB host for compatible mass-storage devices.
The CR350 does not include an integrated RJ45 Ethernet port. IP communication can be provided through Ethernet over USB, an integrated Wi-Fi or cellular option, or an external communication gateway. Supported protocols and services include PakBus, Modbus RTU, Modbus ASCII, Modbus TCP, DNP3, MQTT, HTTP, HTTPS, FTP, FTPS, SMTP, and NTP.
Versions for Europe
- CR350 – standard version with USB-C, RS-232, RS-485, and SDI-12;
- CR350-WIFI – version with integrated 2.4 GHz Wi-Fi communication;
- CR350-RF422 – version with integrated 863–870 MHz radio for Europe, the Middle East, and Africa;
- CR350-CELL215 – version with integrated 4G LTE CAT-1 communication for Europe, the Middle East, and Africa.
Learn more about the CELL215.
Applications
The Campbell Scientific CR350 is suitable for:
- geotechnical and structural monitoring;
- monitoring landslides, dams, bridges, and infrastructure facilities;
- meteorological and agrometeorological stations;
- water-resource and hydrological monitoring;
- environmental and soil monitoring;
- water level, flow, rainfall, and water-quality measurement;
- energy and photovoltaic installations;
- industrial RS-485 and Modbus measurement systems;
- autonomous monitoring stations powered by batteries and solar panels.
Compatibility and Programming
The CR350 is programmed using CRBasic and can be configured with Short Cut, Device Configuration Utility, PC400, or LoggerNet. It supports analog, current, pulse, RS-232, RS-485, SDI-12, Modbus, and other serial sensors.
The datalogger is compatible with low-current and low-voltage solid-state relays but is not compatible with SDM or CDM peripheral devices. The CR350 cannot apply reverse excitation, so some specialised conductivity or soil matric potential sensors may not be compatible.
View the other dataloggers for automated monitoring available from Solitech.
| Model | Campbell Scientific CR350 |
| Device type | Measurement and control datalogger |
| Processor | ARM Cortex-M4, 120 MHz |
| Program memory | 50 MB serial flash |
| Data storage | 50 MB serial flash |
| System memory | 7 MB RAM |
| Maximum scan rate | 10 Hz |
| Analog inputs | 4 single-ended or 2 differential inputs |
| Analog-to-digital converter | 24-bit ADC |
| Analog input range | –100 to +2500 mV and ±34 mV range |
| Current measurements | 0–20 mA or 4–20 mA through SE1 and SE2; measurement range up to 25 mA |
| Analog voltage accuracy | ±(0.04% of measurement + offset) from 0°C to +40°C |
| Pulse counters | 8 |
| Maximum pulse frequency | up to 35 kHz depending on the terminal |
| Digital inputs and outputs | up to 7 configurable terminals |
| SDI-12 | 2 independent SDI-12 terminals, C1 and C2 |
| Voltage excitation terminals | 2 × VX, programmable from 0.15 to 5 V |
| Switched power outputs | 2 × SW12V for sensors and communication devices |
| USB port | USB Type-C 2.0, up to 12 Mbps; device and host modes |
| RS-232 | 9-pin RS-232 port, COM1, and two independent COM2/COM3 ports |
| RS-485 | 2 independent half-duplex RS-485 ports, COM2 and COM3 |
| Ethernet | Ethernet over USB using RNDIS; no integrated RJ45 port |
| Communication protocols | PakBus, Modbus RTU, Modbus ASCII, Modbus TCP, DNP3, and SDI-12 |
| Internet protocols and services | IPv4, IPv6, TCP, UDP, TLS 1.2, HTTP(S), FTP(S), SMTP/TLS, MQTT, DNS, DHCP, and NTP |
| BAT terminal power input | 12 V DC |
| CHG terminal power input | 16–32 V DC from a power converter or solar panel |
| Idle current consumption | approximately 0.5 mA at 12 V DC |
| Current consumption during scanning | approximately 1.5 mA at a 1 Hz scan rate with one analog measurement |
| Processor always-on consumption | approximately 8 mA at 12 V DC |
| Real-time clock accuracy | ±3 minutes per year |
| Internal clock battery | CR2032X, approximately 6-year life without external power |
| Operating temperature | –40°C to +70°C, non-condensing |
| Case material | High-impact-resistant polycarbonate |
| Dimensions | 16.3 × 8.4 × 5.6 cm |
| Weight | 288 g for the standard CR350; 306 g for communication versions |
| Programming | CRBasic and Short Cut |
| Recommended recalibration | Every 3 years |
Related products
-
Soil Instruments PT100 Resistance
Ideal instrument for monitoring temperature during concrete curing. -
Soil Instruments Vibrating Wire Temperature Sensor
Establish a temperature relationship between structural changes and measurement result. -
Soil Instruments Vibrating Wire W9
Designed for accurate and long term measurement of pore water pressures in fully or partially saturated soil and rock. -
Soil Instruments VWnote
Handheld device which takes readings from vibrating wire (VW) sensors.
