Common Instrumentation

Common Campbell Scientific sensors and instrumentation Campbell Scientific Manuals page Direct link to useful manuals:

Wiring

Common Sensor Wiring

Meteorological

 Air Temperature / Relative Humidity Sensors: Current AT/RH Sensor, Older AT/RH Sensor
 Wind Speed / Wind Direction (top sensor on the met tower): RM Young Wind Monitor
 Wind Speed (often 1m or 3m sensor) MetOne Anemometer, Taylor Instruments WS & WD (for extreme environments)
 Another commonly used Wind Direction sensor: MetOne Wind Direction
 Snow Depth Most common, yr2007+ model
 Precipitation: Texas Electronics Tipping Bucket, Wyoming gage with pressure transducer

Radiation

 Net Radiation Rebs Q7.1
 Shortwave Radiation Eppley PSP or Eppley PSP-2
 Longwave Radiation Eppley PIR, PIR Battery-less operation

Subsurface

 Soil Moisture: Current Soil Moisture, Older Soil Moisture
 TDR Soil Moisture: TDR system
 Soil Temperature: Department made thermistor strings.  Installed thermistors include Alpha and YSI and US Sensor

Water Quality

 Pressure Transducers: GW Scientific 5psi, Instrumentation Northwest 9805, INW PT12 5 psig (3m max water depth or less) and 15psig (greater than 3m water depth)
 pH: Greenleaf(?)
 Electrical Conductivity: Campbell CS547a

Telecommunication

 Remote Internet: Starband
 Radio: Freewave FGR115MB
 Iridium: 9522B

Animal Protection

 Electric Fence
 Cable Protection: Metal flexible conduit, Liquid-tite

Environmental Protection

 Duct Seal
 Electrical Tape

Common Site Configurations

• 3 meter Meterological Tower

 1m Net Radiation
 3m Air Temperature / Relative Humidity
 3m Windspeed / Wind Direction
 Tipping Bucket Precipitation
 1m Air Temperature / Relative Humidity (optional)
 1m Wind Speed (optional)
 Snow Depth (optional)
 Barometric Pressure (optional)

• 10 meter Meteorological Tower

 1m Net Radiation
 Incoming and outgoing Shortwave Radiation
 Incoming and outgoing Longwave Radiation
 1m Air Temperature / Relative Humidity
 1m Wind Speed
 3m Air Temperature / Relative Humidity
 3m Wind Speed
 10m Air Temperature / Relative Humidity
 10m Wind Speed / Wind Direction
 Snow Depth (optional)
 Barometric Pressure (optional)

• Common Subsurface Sensors

 Soil Moisture installed horizontally at 5cm, 10cm, 15cm, 25cm, 40cm, 55cm, 85cm, 100cm (usually at least two sensors per profile)
 Soil Surface Temperature, 0 or 0.5 cm below ground surface
 Soil Temperature (6 thermistors A) 2.5cm, 5cm, 10cm, 15cm, 20cm, 25cm
 Soil Temperature (6 thermistors B) 5cm, 15cm, 30cm, 50cm, 85cm, 100cm
 Soil Temperature (12 thermistor A) 2.5cm, 5cm, 10cm, 15cm, 20cm, 25cm, 35cm, 50cm, 75cm, 100cm, 125cm, 150cm
 Soil Temperature (12 thermistor B) 10cm, 25cm, 50cm, 75cm, 100cm, 125cm, 150cm, 200cm, 250cm, 300cm, 350cm, 400cm

Came across a WMO document. They suggest minimum standard soil temperature profile depths:

 5cm, 10cm, 20cm, 50cm, and 100cm below ground surface and the surface should be similar for an area of 75cm^2 above the profile.  WMO uses a bare ground standard which isn't really applicable but the rest of the information seems useful.

Handy Code Snippets

• Campbell Scientific Sample Code
• Excel Macros -- Handy Excel Macros useful for data processing
• Grep batch file (written for DOS)

worth checking out later

• cheap snow sensor: http://www.maxbotix.com/Ultrasonic_Sensors/Self-Cleaning_High_Accuracy_Snow_Sensors.htm