SunSentry 20
SunSentry 20
OrderableDigital, RS-485 Solar Operational Meteorological Monitoring Station
Overview
As a digital-only version of the original SunSentry™, the SunSentry 20 features an AC power input inside the main enclosure instead of a separate AC pull box. Specifically designed to support the irradiance and weather reporting needs of utility-scale solar farms, this solar operational meteorological (met) monitoring station provides weather reporting data for a wide variety of applications.
The SunSentry 20 establishes a new chapter of met station design and ease of use. Each station is standardized, stocked, follows the industry requirements of IEC 61724-1:2021, and exceeds IEC 61000-4-5 Class 4 surge immunity levels. Station installation is made easy via pile-mountable hardware, bulkhead connectors, and the renowned SunSentry web user interface (UI).
Note: Some of the SunSentry 20 images are shown with optional mounting hardware, solar panels, and sensors that are sold separately.
Key Advantages
Technical Description
The two bulkhead-mounted, five-pin M12 connectors provide two independent communications channels. One channel supports the met tower sensors, whereas the other channel supports the solar panel array sensors.
Benefits
- Integrated AC/DC power supply, eliminating the need for a separate AC/DC enclosure or add-on
- Two bulkhead-mounted five-pin M12 connectors providing two independent communications channels
- Compatible with Campbell Scientific's RS485CBL ecosystem
- Optional accessories available for surge protection, battery backup, and solar power input
- Optional smart sensor to monitor temperature and humidity within the enclosure and detect door openings and closings
Specifications
- Operating Temperature
- -20° to +60°C
- Processor
- CR1000Xe
(For CR1000Xe Measurement and Control Datalogger specifications, refer to the CR1000Xe product page.)
- Power Monitoring
- Batt, AC
- Power Input
- 90 to 264 Vac
- Maximum Power for Sensors
- 100 W
- Battery Backup
- Up to 55 Ah
- Enclosure Material
- 304SS
- Enclosure Rating
- IP66
- Lockable Box
- Requires included key tool to open
- Battery-Backed Data Logger
- The data logger is battery backed while external power is disconnected.
- Battery-Backed Main Met Station
- The system and sensor power are battery backed while external power is disconnected for a minimum of three days (UPS version only).
- Enclosure Dimensions
- 60 x 50 x 20 cm
(23.62 x 19.69 x 7.87 in.)
- Enclosure Weight
- 15.88 kg
(35 lb)
- CR1000Xe Dimensions
- 23.8 x 10.1 x 6.2 cm (9.4 x 4.0 x 2.4 in.); additional clearance required for cables and wires
- CR1000Xe Weight
- 0.86 kg
(1.9 lb)
Memory
- Total Onboard
- 128 MB of flash + 4 MB battery-backed SRAM
(A 2 GB SD card is included.)
- Data Storage
- 4 MB SRAM + 72 MB flash
(extended data storage automatically used for auto-allocated data tables not being written to a card)
- Data Storage Expansion
- Removable microSD flash memory, up to 16 GB
Power Source
- AC Voltage Range
- 100 to 240 Vac, 15% to +10%
- DC Voltage Range
- 110 to 250 Vdc, 18% to +40%
- Frequency Range (fN)
- 50 to 60 Hz, ±10%
UPS Battery
- Voltage Range
- 24 to 27.1 Vdc
(2 x 12 Vdc, nominal)
- Battery Type
- Flooded/AGM
Common Accessories
(7)46444
12 V 55 Ah Group 22NF AGM Deep-Cycle DCM0055 Lead-Acid Battery
The 46444 is a 12 V 55 Ah battery commonly used for backup power with the SunSentry™20 Solar Operational Monitoring Met Station. When sourcing batteries locally, the 46444 represents the ideal largest size that will fit into the SunSentry 20 enclosure.
OrderableCS211
Smart Enclosure Sensor
The CS211 is a low-power, smart sensor designed to monitor temperature and humidity levels inside enclosures. The sensor features an optical door switch to detect door openings and closings, and a multifunctional button that recognizes short, long, and double presses for user-defined actions. Additionally, the CS211 includes an LED indicator to signal enclosure wetness and when desiccant needs to be replaced.
Orderable46433
Over-Voltage Protection Kit for SunSentry 20
The 46433 is an optional kit designed for locations without stable AC power. It includes an over-voltage surge protector for the AC mains coming into the SunSentry™20 Solar Operational Monitoring Met Station. Note: This is a factory-installed kit that should be ordered at the same time as the SunSentry 20.
Orderable41457
Solar Input Kit for SunSentry 20 (solar panel and solar panel mount sold separately)
The 41457 kit's solar input charge controller connects to a solar panel (sold separately) and the SunSentry™20 Solar Operational Monitoring Met Station batteries for solar power backup. In addition to this Victron 75/15 charge controller, the kit includes a fuse terminal block and wiring. Wire the kit directly to the batteries for operation in 24 V charge mode. Caution: The correct setup of the 41457 is critical to the proper operation of your SunSentry station. If you purchase the 41457 for field installation, system failure may result if it is not properly set up using the Victron VEPower setup software to make the necessary parameter changes.
Orderable42398
125 W 24 Vdc System Solar Panel with Mounting Hardware
The 42398 includes a 125 W 24 Vdc solar panel and mounting kit with a 2.0 m (6.56 ft) cable. To provide solar power to a SunSentry™20 Solar Operational Monitoring Met Station, use the 42398 kit to attach the solar panel to a CM400 Pile Mount Tower.
OrderableISP11
Inline Surge Protection Device for Data Logger Protection on Digital Sensor Lines with Five-Pin Plug-to-Socket Shielded M12 Connections
The ISP11 is a surge protection device for Modbus RTU communications and power lines at the meteorological (met) station side. The device is intended to connect to the main met side of the cables, providing a greater level of protection for the data logger.
OrderableCM400
Pile Mount Tower with 6 ft Crossarm
The CM400 is an ideal mount to secure a SunSentry Solar Operational Meteorological Monitoring Station to a driven pile. The included 20.32 cm (8.0 in.) hook bolts accommodate an I-beam style pile with flange dimensions 7.6 to 17.8 cm (3 to 7 in.), such as a W6x12.
Orderable
Other Accessories
(19)RS485CBL
Five-Conductor Cable with M12 Five-Pin A-Coded Connector
The RS485CBL cable uses a five-conductor shielded cable with an M12 five-pin A-coded connector. The cable has a polyurethane jacket that is UV resistant. The RS485CBL has been custom designed for sensors that use the RS-485 Modbus protocol with integrated power and signal lines. The signal lines have twisted pairs with 24-gauge conductors, and the power lines have a heavier 20-gauge wire, making the cable uniquely suitable for sensors with a higher current draw that have either short or long runs. An aluminum Mylar shield is grounded via a drain wire and connected to the M12 nut.
OrderableISP10
Inline Surge Protection Device for Digital Sensors with A-Coded, Five-Pin M12 Connector
The ISP10 is a surge protection device for Modbus RTU sensors. The ISP10 provides protection that meets the IEC 61000-4-5, level 4 (4 kV, 2000 A) surge protection standard. It incorporates a T-junction that allows a sensor to be connected inline. The five-pin M12 connectors are configured to match the SunSentry system's trunk-line cable pinout, which is compatible with the RS485CBL 24 AWG RS-485 Cable with M12 Five-Pin Connector.
Orderable46595
M12 Plug, Five-Pin, Field-Wireable Connector Kit
The 46595 is a field-wireable, M12, five-pin, A-coded, plug connector with shielding that can be used to field-terminate an RS485CBL Five-Conductor Cable if needed. This setup facilitates shortening an on-site RS485CBL while still providing a connector termination for landing on the SunSentry™20 Solar Operational Meteorological Monitoring Station enclosure. (This connector is not required if coiling extra cable is an option. If extra cable cannot be coiled and the cable needs to be shortened, the 46595 provides the option to re-terminate the cable.)
Orderable44370
RS485CBL M12 Five-Pin Shielded Tee Coupler for Daisy-Chaining
The 44370 tee coupler is used to wire split standard five-pin A-coded connections. It is commonly used to daisy-chain multiple digital Modbus sensors, such as the CS241DM and CS241DM G2 back-of-module temperature sensors, enabling multiple sensor connections on a single trunk-line cable.
Orderable44339
RS485CBL Adapter for SunSentry Used with Atonometrics Sensor (RC22 PV Reference Cell)
The 44339 adapter enables you to integrate an Atonometrics sensor—such as the RC22 PV Reference Cell—into a daisy-chain configuration on a SunSentry Solar Operational Meteorological Monitoring Station. The adapter allows the sensor to connect to the SunSentry system using a single trunk-line cable by remapping the pin assignments to match the RS485CBL 24 AWG RS-485 Cable with M12 Five-Pin Connector. The 44339 also routes the cable shield through the connector's coupling nut, improving surge protection and reducing signal noise for more reliable operation.
Orderable44489
RS485CBL Adapter for SMP10 or SMP12 Used with RS485CBL, ISP10, or SunSentry
The 44489 adapter enables you to integrate a Kipp and Zonen sensor—such as the SMP10 Radiation Sensor with Digital RS-485 Output or SMP12—into a daisy-chain configuration on a SunSentry Solar Operational Meteorological Monitoring Station. The adapter allows the sensor to connect to the SunSentry system using a single trunk-line cable by remapping the pin assignments to match the RS485CBL 24 AWG RS-485 Cable with M12 Five-Pin Connector. The 44489 also routes the cable shield through the connector’s coupling nut, improving surge protection and reducing signal noise for more reliable operation.
Orderable44338
RS485CBL Adapter for SunSentry Used with Digital EKO Pyranometer
The 44338 adapter enables a single trunk-line cable to connect an array-mounted digital EKO pyranometer to the SunSentry Solar Operational Meteorological Monitoring Station. The adapter remaps the pin assignments between the two interfaces so the pyranometer is fully compatible with the RS485CBL 24 AWG RS-485 Cable with M12 Five-Pin Connector in a daisy chain with other sensors. The 44338 routes the cable shield through the connector's coupling nut, improving surge protection and reducing signal noise for more reliable operation.
Orderable44732
RS485CBL Adapter for SunSentry Used with Lufft All-In-One
The 44732 is an accessory adapter cable designed so you can connect a Lufft all-in-one sensor that has an eight-pin M12 connector to the RS485CBL 24 AWG RS-485 Cable with M12 Five-Pin Connector through a five-pin M12 connection. This adapter cable provides a simple, factory-built interface to integrate compatible Lufft sensors with SunSentry systems. The 44732 features overmolded M12 connectors with a printed identification label.
OrderableCM410
Pile Mount Arm (no finish or matte black finish)
The CM410 is used primarily to mount a pair of pyranometers to a driven pile, leveraging the CM275 Albedometer Mounting Kit. The included 20.32 cm (8.0 in.) hook bolts accommodate an I-beam style pile with flange dimensions 7.6 to 17.8 cm (3 to 7 in.), such as a W6x12. Albedo is a common measurement parameter selected for a SunSentry Solar Operational Meteorological Monitoring Station. Installation details, including the recommended pile exposure height and orientation, are found in the SunSentry Installation Guide. To minimize localized glare and reflections that can adversely influence albedo measurements, the all-black version of the CM410 is recommended for albedo.
OrderableCM256
Adjustable Plane and Angle Solar Mounting Stand
The CM256 adjustable-angle, adjustable-plane mounting stand further simplifies the accurate and precise mounting of a pyranometer, ventilation unit, shadowband radiometer, or reference cell. Several pyranometer mounting stands have been combined and simplified to make ordering easier and usability friendlier. The CM256 is a combination of the CM255LS pyranometer mount, CM245 reference cell and shadowband mount, 31394 VU01 mount, and 31153 CVF4 mount. In addition, several new sensors are now fully supported such as the SPN1, MS-80(M), SR30, SR05, and IMT reference cell CM325.
OrderableCM261
Single-Axis Tracker Mounting Stand
The CM261 single-axis tracker pyranometer mount with adjustable plane simplifies the mounting of any pyranometer, ventilation unit, reference cell, or SPN1 to octagonal, round, and square single-axis torque tubes. The CM261 is a combination and simplification of the CM260 and CM265 to make ordering easier and usability friendlier. The bracket includes provisions for mounting the sensors and ventilation units at different heights, allowing the sensing element to be mounted at the same height as the solar modules.
OrderableCM266
Unistrut Mount
The CM266 is a true universal irradiance sensor mount. Its design makes use of the ubiquitous construction material, Unistrut. Attach your irradiance sensors anywhere you can mount a section of Unistrut.
OrderableCM268
PV Module Mount
The CM268 irradiance sensor mount is designed so you can make irradiance measurements as close to the modules/panels as possible. The mount can be clamped to the panel side, allowing for more representative and distributed measurements throughout the array.
OrderableCM275
Albedometer Mounting Kit
The CM275 is a universal solar albedo mounting stand to mount any downwelling/upwelling combination of pyranometer, ventilation unit, reference cell, or spectral radiometer. No other reference cell albedo mount is available that will allow a ventilated pyranometer on the top and non-ventilated pyranometer on the bottom.
OrderableSunVue 30
ISO 9060:2018 Class A Spectrally Flat Thermopile Pyranometer with Integrated Dome Heating
The SunVue™30 is an ISO 9060:2018 spectrally flat Class A pyranometer developed through a multi-year engineering effort to redefine the ownership experience. Designed for high-precision solar monitoring, it delivers premium measurement quality with a low-maintenance, field-ready design. It is fully compliant with IEC 61724-1 Class A performance monitoring requirements, with an integrated dome heater for dew and frost mitigation.
OrderableClimaVue 40
Compact, Digital, RS-485 Modbus Weather Sensor
The ClimaVue™40 is an all-in-one meteorological sensor designed for solar plant operational monitoring and solar resource assessment with IEC 61724-1 compliance. Campbell Scientific is well known for creating accurate and reliable instruments. We recognize that ease of operation and overall cost of operation are critical. With the ClimaVue 40, you will get this and more. In adherence to IEC 61724-1 (2021), the ClimaVue 40 provides ambient air temperature, barometric pressure, precipitation, relative humidity, wind direction, and wind speed measurements. The sensor also offers vapor pressure, tilt, lightning strike, and lightning average distance measurements.
OrderableCS241DM G2
Pt-1000 Class A, Precision Back-of-Module Temperature Sensor with Digital Modbus RS-485 Output, Second Generation
The CS241DM G2 is the second generation of CS241DM, a digital Modbus version of our CS241 Pt-1000 Class A, Back-of-Module Temperature Sensor. This updated sensor features the same best-in-class, surface-mountable temperature sensor with features optimized for bifacial photovoltaic (PV) module performance assessment and soiling. The G2 provides the same measurement accuracy with industrial IEC Class 4 surge protection as its predecessor.
OrderableDustVue 10
Solar-Module Soiling Sensor
This sensor measures photovoltaic (PV) soiling loss using collocated clean and naturally soiled PV reference cells in accordance with the preferred methodology described in IEC 61724-1. The clean reference is automatically protected, maintaining a consistent baseline without reliance on manual cleaning schedules or correction assumptions.
Orderable38476
16 GB microSD Flash aMLC Memory Card
The 38476 is a 16 GB microSD flash-memory card designed for use in harsh conditions often presented by environmental and industrial applications in which customers require higher reliability, endurance, and performance but also seek a cost-effective solution to meet budget-planning requirements.
Orderable
Replacement Parts
(4)42815
Four-Unit Desiccant Bags (quantity of 10)
The 42815 includes 10 large, four-unit desiccant bags, used to absorb humidity within enclosures. Multiple packs are recommended for customers who need to desiccate multiple enclosures or systems.
Orderable6714
Four-Unit Desiccant Bags (quantity of 20)
The 6714 includes 20 large, four-unit desiccant bags, used to absorb humidity within enclosures. Multiple packs are recommended for customers who need to desiccate multiple enclosures or systems.
Orderable27158
2 GB microSD Flash SLC Memory Card
The 27158 is a 2 GB microSD flash-memory card. This card is designed for use in harsh conditions often presented by environmental and industrial applications. The card uses single-level cell (SLC) memory, which aids in its ability to operate over wide temperature ranges, consume less power, and provide a reliable data-storage medium through more read-write cycles.
Orderable46599
Enclosure Key for the SunSentry 20
The 46599 is the replacement key for the SunSentry 20 Solar Operational Meteorological Monitoring Station enclosure door look. The key can be purchased to replace a lost or damanged enclosure key or when additional keys are needed. Note: This key will not unlock other enclosures.
Orderable
Services
(3)33266
CR1000X Calibration with Data (-40 to +70C)
The 33266 provides calibration of the CR1000X to meet original specifications. This process includes calibration at the CR1000X standard temperature range (-40° to +70°C). Before and after calibration sheets are included with the calibration. An RMA (Return Material Authorization) from Campbell Scientific is required.
Orderable33267
CR1000X Extended Temperature Test (-55 to +85C)
The 33267 testing must be purchased in conjunction with the 33266 Calibration. The 33266 provides calibration of the CR1000X to meet original specifications. The 33267 process includes testing at the CR1000X extended temperature range (-55° to +85°C). Testing at the extended temperature range is only available for a CR1000X that previously passed the extended temperature testing. An RMA (Returned Material Authorization) from Campbell Scientific is required.
Orderable34156
CR1000X Calibration over Temperature and ISO/IEC 17025 Calibration Verification with Certificate
The 34156 provides factory calibration of the CR1000X to meet original specifications, then sends the calibrated data logger to be verified by a certifying body that is accredited to the ISO 17025 standards. This service requires an RMA (Return Material Authorization) from Campbell Scientific. The factory calibration includes comprehensive testing of all data logger functions over its standard temperature range (-40° to +70°C) and the replacement of the internal lithium battery and desiccant packs. During testing, the data logger’s operating system is updated, and all settings are restored to factory defaults unless otherwise requested. Upon completion of the factory calibration, the data logger is sent to the ISO 17025 accredited certifying body referenced above for calibration verification.
Orderable
Similar Products
(1)
Compatibility
The SunSentry 20 is digital, RS-485 compatible only.
The SunSentry 20 supports a single sensor array in addition to a standard array of met sensors. Adapters must be used with Campbell Scientific's RS485CBL system. Sensors must be daisy-chained to the SunSentry 20 for fast, simple installation.