USB adaptor
Gypsum Sensor
Leaf Sensor
Moisture board
Power Injector
The Leaf Wetness Sensor
Small circuit board mounted
fully adjustable
this imitates the leaf wetness
The leaf wetness sensor is
made up of two parts
moisture board, leaf sensor
Solar Radiation
Moisture boards
{1} Leaf wentness
{2} Soil Moisture Sensor
Fig1
The Photodiode has been extended from the circuit board , and mounted in a table tennis ball this will protect the photodiode and allow enough light for the device to work the Ping Pong Ball is glued to a plastic tube , then mounted in to a waterproof box and sealed with sealant
Fig 1
Solar radiation
sensor
mounted
on the main poll
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Barometer
I have now replaced the Oregon barometer with a hobby board barometer
It reads pressure from 28-32 inHg (948-1083 mb). It's resolution is 0.01 inHg (0.34 mb).
Barometer
Temp/Humidity
05/03/2009
(Fig 2) Temperature / (Fig 3) Humidity
I have added a temperature and humidity sensors these have been modified, they are mounted off the circuit board , and converted them into probe type sensors the humidity Sensor has a cotton Tube over the humidity sensor element, this has proven to increase the performance and the accuracy of the humidity Sensor these sensors were calibrated using a Sheathed ordinary Hygrometer . Met Office pattern (BS692).
Fig 3
Fig 2
1
2
The rain gauge has been converted to run on the 1-wire system
this has replaced the Oregon rain sensor
0.025mm tip
Dual counter
