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Testimonials
University of Zagreb Faculty of Agriculture
Cranfield Water Science Institute,
Cranfield University, UK
Head of Environmental Research Group, Southampton University
Scottish Agricultural College
- Powerful, rugged and highly flexible weather station
- Designed for use in severe weather conditions
- Wide choice of sensors, including soil moisture
- Cellular modem communications
- Compatible with DeltaLINK-Cloud online data sharing platform
- Calculation of full Penman-Monteith evapotranspiration equation
The advanced WS-GP2 Automatic Weather Station is based on the powerful GP2 Data Logger. It is an ideal solution for research and environmental monitoring applications at remote and exposed sites. The WS-GP2 provides a highly rugged and flexible system – users can select the optimal combination of sensors, logger, power and communications.
DeltaLINK‐Cloud – online data viewing and sharing platform
Sensors
The standard WS-GP2 includes sensors to measure rain, solar radiation, soil temperature, wind speed and direction, relative humidity and air temperature.
Flexibility
The GP2 Data Logger has the power and flexibility to handle almost any environmental sensor, which means the WS-GP2 Weather Station can be as simple or as complex as your application requires. Even after installation, it’s easy to adapt the system to your specific needs. Optional sensors include barometric pressure, soil moisture, soil EC, UV, PAR, albedo, net radiation, total and diffuse radiation, and evaporation.
Data handling
Data can be easily collected by laptop via USB, or remotely using the cellular modem options. DeltaLINK Software makes it easy to set up recording intervals and to view and download stored data.
Data presentation options include wind rose, gusts and average (including direction and vector average).
SDI-12 enabled
The GP2 Data Logger supports SDI-12 inputs. GP2s supplied before March 2016 can be easily updated via a software download.
Key features:
- Huge additional input capacity for SDI-12 sensors
- Analog and digital channels fully available
- Highly flexible logger + sensor networks
For more information visit our GP2 SDI-12 page.
Advanced features for meteorology
For researchers interested in evapotranspiration, degree days, disease prediction, wind chill factor, dew point, PID control, etc. the GP2’s advanced features will open up exciting possibilities.
Calculation of full ASCE/FAO 56 Penman-Monteith evapotranspiration equation
The WS-GP2 Weather Station and DeltaLINK Software (versions 3.7 and later) enables the full ASCE/FAO-56 Penman-Monteith equation for calculating reference evapotranspiration (ETo).
ETo is calculated by the WS-GP2 Weather Station using the available measurements of relative humidity, wind speed, solar radiation, and air temperature. This ET implementation includes the ability to vary crop albedo/LAI, canopy resistances, crop height and sensor heights.
The functionality can be easily accessed by users as a selectable recording option within DeltaLINK. Calculated ET can be recorded as hourly and daily values – and may be used in further bespoke calculations or to guide field irrigation decisions.
User guide to Penman Monteith Evapotranspiration in the WS-GP2.
Customisation
The GP2’s analog inputs can be fully customised. Each channel can have its own input type and recording parameters. DeltaLINK software gives the user control over reading frequency, thresholds and units, and provides recording options for average, min and max, plus specialised wind options – including wind rose, gusts and wind averaging
Users can add their own custom sensor types to the sensor library, exploiting the GP2’s detailed configuration options. The GP2 provides 4 input ranges down to microvolt resolution with adaptive auto-ranging, excellent analog accuracy, and configurable sensor excitation – enabling it to support nearly all analog sensors.
Calculations based on the measurements from several input channels can be recorded and displayed as additional virtual channels (calculated measurements).
Script Editor
This powerful software feature creates step by step operations to control simple or complex processes or recording requirements. The degree of sophistication it offers means the potential applications are numerous and varied. The editor interface is easy to use, no programming language is involved.
- Creates sequences of operations to implement models
- Advanced control and recording capabilities
- Easy user interface: no typing out of commands; no programming language
- Implement simple or complex conditions, algebraic expressions and record result values
Simulator
This unique software feature allows logging programs to be tested before real-world activation. For applications involving weather data, irrigation or soil moisture recording, the environmental variables can be changed to test how the program responds. Years of logging time can be simulated in just a few minutes.
- Implement simple or complex conditions, algebraic expressions and record result values
- Create and manipulate variables e.g. for disease risk factor
Specification
GP2 Data Logger – Brief Specs
| Input connections | 12 differential (or 24 single-ended) analog inputs configurable as: Voltage, Resistance (12 3-wire or 24 2-wire), Bridge (12), Potentiometer (12) 4 digital inputs as: Counters, (2 fast + 2 slow), Frequency, Digital state 1 Delta-T WET sensor channel |
| Control outputs | 2 relay outputs expandable to 6 (1 A) |
| Readings stored | 2.5 Million |
| Recording rate | 1 second to 24 hours |
| Configuration | DeltaLINK |
| Communication options | USB, RS232, ethernet or modem |
| Sensor excitation | Calibrated 3V reference, +5 V and +12 V regulated, or 5 to 10.5 V (battery or external power), user selectable |
| Power | 6 AA alkaline batteries or external power 10-15 V DC |
| Battery life (dependent on usage) | >310K readings, lasting 530 days |
| Enclosure rating | IP65 |
| Temperature range | -20 to +60°C |
| Display | – |
| Size | 225 x 185 x 75 mm |
| Typical applications | Demanding research projects |
| Environmental monitoring | |
| Varied control applications |
For full GP2 specification please see the GP2 data sheet
WS-GP2 Sensors – Brief Specs
| Specification | Range / Note | |
| Wind speed AN-WD2 (combined wind sensor) | ||
| Range | 0 to 75 m.s-1 | |
| Accuracy | ± 0.1 m.s-1 | Up to 10 m.s-1 |
| ± 1.1% of reading | Over 10 m.s-1 | |
| Starting threshold | 0.4 m.s-1 | -30°C to +70°C if icing minimal |
| Wind direction AN-WD2 (combined wind sensor) | ||
| Accuracy | ± 4° | mechanical: 0 to 360° electrical: 0 to 356° |
| Starting threshold | 0.4 m.s-1 | -30°C to +70°C (if icing minimal) |
| Rainfall RG2+BP | ||
| Sensitivity | 0.2 mm per tip | up to 360 mm.hr-1 |
| Humidity RHT2nl (combined air temp sensor) | ||
| Accuracy | ± 2% RH | 5 to 95% RH |
| ± 2.5% RH | <5% and >95% RH | |
| Air temperature RHT2nl (combined RH sensor) | ||
| Accuracy | ± 0.1°C | 0 to 70°C |
| Solar radiation ES2 | ||
| Absolute accuracy | ± 5% | At 20°C (optimal conditions) |
| Linearity | ± 1% | 0 to 2 kW.m-2 |
| Soil temperature ST1 | ||
| Accuracy | ± 0.2°C | -10 to +65°C |
| Mast M2-FSG | ||
| 2m mast | With cross arm, stakes, steel guy wires, baseplate and logger canopy | |
Accessories
Hardware
Main components and software
Mountings and enclosures
Installation accessories
Cables and networks
Remote communications
Spares and consumables
Power options
Other
Product Resources
Data Sheets
- WS-GP2 Weather Station Data Sheet 612 KB
Filename: WS_GP2_Data_Sheet_version_5 - DeltaLINK-Cloud - online data viewing and sharing service 2 MB
Filename: DeltaLINK-Cloud_data_sheet_ver_3 - Environmental and Meteorological Sensor Specifications 5 MB
Filename: env-and-met-sensors-and-systems-specifications - GP2 Data Logger and Controller Data Sheet 4 MB
Covers the GP2's advanced data logging, smart control, and Simulator features
Filename: GP2_datasheet_ver_2_LR - GP2 Data Logger cabling and network options
One page technical note - featuring GP2 Data Logger cabling & network options diagram
Filename: WS-GP2
Case Studies
- Cranfield University - Using WS-GP2 to improve banana irrigation management in ColombiaDownloadFilename: →
Manuals
FAQs
- Setting up an M12 cable network to ensure a waterproof and secure connection.
Question
What is the best practice for setting up a M12 cable network to ensure a waterproof and secure connection..
Answer
It applies to:
GP2 for SDI-12 and logger networks.
Celora for SDI-12 networks.
All sensors with M12 connector cables.Examples of SDI-12 network and GP2 logger networks:
DO
When connecting multiple cables and T-piece together, it is essential that any M12 connector is tightened sufficiently:
• Ensure internal connector O-ring and opposite sealing face are free from dirt.
• Tighten the connector thumbscrews as much as you can by hand or use a torque driver set to 1Nm to be sure. See video:We recommend the Weidmuller “1900021000” torque driver:
• This will save lots of painstaking troubleshooting hours if you do have a loose connection and give you piece of mind that all connectors are correctly tightened.
• Untightened connectors can come undone and let water into the cable network which can damage wire cores and cause erroneous readings.
Connect in the office first and then transfer the network to the field. This way, you’re not trying to do it in unpleasant weather and the time pressures are off.
DON’T
Use duct tape. This will hold water against the connector. If tightened correctly, the connector will seal and hold.
Technical Notes
- User guide to Penman Monteith Evapotranspiration in the GP2 Data logger and controller 876 KBDownloadFilename: User_guide_to _Penman Monteith_ Evapotranspiration_in_the GP2_Data_logger
- A method of calibration and variance analysis with respect to the Penman-Monteith equation for the Turc, Hargreaves and Abtew potential evapotranspiration models 1 MB
The full ASCE/FAO-56 Penman-Monteith evapotranspiration (PM-ET) equation and crop coefficients are often employed for irrigation scheduling of open-field crops. This paper focuses on the Turc, Hargreaves and Abtew models which employ daily averages of: solar radiation, air temperature and relative humid to determine daily ET.
DownloadFilename: Calibration and variance analysis with respect to Penman-Monteith equation for potential evapotranspiration models 5.8.19