WS-GP2 Advanced Automatic Weather Station System

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Weather Station Zoom
WS-GP2 Weather StationWS-GP2 Weather Station with solar powerGP2 Data Logger and ControllerGP2 Dom’s edit for website – Copy


"We have two Delta-T weather stations in Kazakhstan that have been working in extreme environmental conditions for many years: +40 to -30 C and dusty." Prof. T W Tanton
Head of Environmental Research Group, Southampton University
"We have 6 weather stations in the field. We ordered another 2 earlier this year. The 6 stations in the field have run constantly for several years and are robust and very reliable. We would have no hesitation in recommending Delta-T as a supplier of weather monitoring equipment." Mr John Swaney
Scottish Agricultural College
  • Powerful, rugged and highly flexible weather station
  • Designed for use in severe weather conditions
  • Wide choice of sensors, including soil moisture 
  • GPRS modem communications
  • Free use of DeltaLINK-Cloud data sharing service
  • 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 – free online data service


The standard WS-GP2 includes sensors to measure rain, solar radiation, soil temperature, wind speed and direction, relative humidity and air temperature.


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 GPRS 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 has been upgraded to support SDI-12 inputs. From December 2015 all new GP2s come with SDI-12 as standard and earlier GP2s can be easily updated via a software download.

Key features:

  • Huge additional input capacity for SDI-12 sensors
  • Existing analogue 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.


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


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


GP2 Data Logger – Brief Specs


   Specification Range / Note
Analog accuracy -0.17 to +2.7V 0.005% + 115μV  at 25°C
 ±23mV 0.022% + 12μV
 -0.17 to +2.7V 0.04% + 150μV  -20°C to +60°C
 ±23mV 0.08% + 27μV
Accuracy other See detailed specification in GP2 User Manual
Readings 2.5 million (approximately) depends on program settings
Logging frequency 1s to > 24 hours 
Logging status Flashing LED 
Environmental-20°C to +60°C, IP65 
Power6 AA alkaline batteries or external power 10-15V DC
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
1 x SDI-12 digital bus InterfaceUnlimited virtual channels

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)
Range0 to 75m.s-1 
Accuracy± 0.1m.s-1Up to 10m.s-1
± 1.1% of readingOver 10m.s-1
Starting threshold0.4m.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 threshold0.4m.s-1-30°C to +70°C  (if icing minimal)
Rainfall RG2+BP
Sensitivity0.2mm per tipup to 360
 Humidity RHT2nl  (combined air temp sensor)
Accuracy± 2% RH5 to 95% RH
± 2.5% RH<5% and >95% RH
Air temperature RHT2nl (combined RH sensor)
Accuracy ± 0.1°C0 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 mastWith cross arm, stakes, steel guy wires, baseplate and logger canopy


Product Resources

Data Sheets



    Technical Notes