Light has three principal characteristics that affect plant growth: quantity, quality, and duration. Light quantity refers to the intensity or concentration of sunlight. Light quality refers to the color or wavelength reaching the plant surface. Light duration or photoperiod refers to the amount of time that a plant is exposed to sunlight.
High levels of uv light can be detrimental to plants. Use this meter to determine the uv filtering capacity of greenhouse shades and glass barriers. Includes one 9-volt battery. Now also available with external sensor on 2-meter cable.
This portable, hand-held meter measures the uv photon flux in the wavelength range of 250 and 400 nanometers in units of µmol m-2 s-1 (micromoles of photons per square meter per second).
New for 2007:
On the inside, our AE50 Award-winning Watch Dog Weather Stations have been completely redesigned for 2007, bringing a host of improvements and new features.
Improved Data Logging
Retains data on the station. Spec Ware downloads only what it needs, so multiple people can download a station, while leaving all data behind for the next person.
Three times the storage capability keeps more data available longer. 12 bit A/D conversion improves resolution and accuracy.
Enhanced LCD Display
Run selected disease models requires corresponding disease package for Spec 8 Pro software on the station (providing field viewing of disease severity indicators).
Review 30 days of high/low history on the display.
Display chill hour and degree day calculations.
Set sensor type and measurement interval through the keypad on the station – no PC pre-setup required. Lower power consumption extends battery life to 12 months, an increase of 50%.
Two additional external sensor ports on all models except Model 2800, which adds a ninth port for rainfall-only.
|3612A||Model A150 - Temp/RH Logger|
|3610A||Model A130 - Temp/Leaf WetnessLogger|
|3617A||Model A125 - Temp/Ext Temp Logger|
|3618A||Model A110 - Temp Logger|
|3661A||WatchDog A-Series PC Connection Cable|
This 9-channel data logging weather station is a versitile solution for:
Each WatchDog Weather Station features a built-in data logger that stores your measurements in a fail-safe, non-volatile memory at user-defined intervals - until you transfer the data to your PC. Select measurement intervals of 1, 10, 15, 30, or 60 minutes. A 30-minute interval will record for 183 days before the station's memory is full. An LCD screen displays current and high/low readings. Add up to 4 plug-in sensors and customize your station to your measurement needs. A 12-month battery power source (4 AA batteries) means no solar panels to purchase or maintain.
Easy to Set Up and Use
Preassembled sensor array with mounting hardware makes setup quick and easy. Add-on sensors plug directly into the station - no complex wiring or calibration required. U.S. or metric units of measure. Mounts to post, tripod, or 1 1/4in. pole.
Requires Spec Ware software.
3345WD2 Watch Dog Model 2800 Weather Station
Get instant on site readings and data logging of wind speed/direction, temperature and humidity. These portable, rapid setup stations are ideal solutions for a quick-response, field-deployable meteorological station to use with pesticide application or civil emergency responses. The station setup is less than three minutes.
Four AA batteries power the station for 12 months. Data is stored in nonvolatile memory. Retrieve data using Spec 8 Pro software and download to a computer or the Watch Dog Shuttle. Stations have six available sensor channels/ports for tracking leaf wetness, quantum light, solar radiation, etc.
Requires Spec Ware Pro software.
3320WD2 Watch Dog Model 2550 Weather Station
Light has three principal characteristics that affect plant growth: quantity, quality, and duration. Light quantity refers to the intensity or concentration of sunlight. Light quality refers to the color or wavelength reaching the plant surface. Light duration or photo period refers to the amount of time that a plant is exposed to sunlight.
Quantum sensors measure light energy at the specific wavelengths plants actually use for photosynthesis. Research indicates that older lux and foot-candle meters could have error rates up to 45% when used to estimate light quantum available for plant growth. Start taking more meaningful light level measurements yourself with a low-cost quantum meter.
All quantum meters here measure Photosynthetic Photon Flux (PPF) as µmol m-2 s-1 for Photosynthetically Active Radiation (PAR) in the range of 400 to 700 nm. Quantum meters can be used in the field, laboratory, above or below plants, in growth rooms and greenhouses. The meter approximates radiation between 400 and 700 nanometers(PAR) as umol m-2s-1.
Now also available with external sensor on 2-meter cable.
The LightScout DLI 100 Meter is an affordable, first step in measuring the light intensity levels affecting your crops. Sold in sets of three to compare light level intensities within or outside your greenhouse. With a push of a button, the DLI 100 Meter records light intensity for a 24 hour period and then calculates the Daily Light Integral (DLI). Real-time intensity levels are shown every 4 seconds in µmol m-2 s-1 (or footcandles).
Using the DLI100
Place the DLI 100 in the ground at the desired location for evaluating the amount of available sunlight. In a greenhouse insert the meter into a container of similar size (containing substrate only) to that of the crop being grown. By so doing, the meter is receiving the same amount of light at the same height as the growing crop. Ensure that the face of the unit is generally parallel to the ground.
Light Gathering Mode
To turn the DLI 100 press the power button located on the shoulder of the device. When the power is applied, the four LEDs will illuminate sequentially from bottom to top. Thereafter, one or more LEDs will flash every 4 seconds, indicating the amount of light currently being received.
The DLI 100 measures the actual light intensity every 20 seconds, then displays that value every 4 seconds until the next measurement is made.
Note: While the DLI 100 is gathering data, pressing the power button will turn off the unit (the four LEDs will illuminate sequentially from top to bottom), and the measurement process will be cancelled. Pressing the button again will start a new 24 hour measurement period.
DLI Display Mode
After 24 hours of continuous operation, the device will stop accumulating light measurements. One or more LEDs will flash every second to indicate the Daily Light Integral (DLI) for that location. The device will shut itself off after displaying the DLI value, but the DLI measurement will be retained in memory. The last DLI value computed can be retrieved from memory by pressing the power button to turn on the unit. The DLI value will flash every second for 10 seconds.
3405 LightScout DLI 100 Meter (Set of 3)
Built-in Data Logger:
*on applicable models
Model 305 includes a quantum light to measure your plants' light exposure over time (in moles/day). The 305 is a comprehensive tool to assess physiological maturity of your plants.
Model 300 offers degree-day and chill hour recording functions at an affordable price. A helpful system to assess plant maturity, pinpoint optimum harvest time, or monitor pest life-cycles.
Apple and pear growers will benefit from the Model 320's disease forecasting functions. Forecasts for apple scab are generated from validated disease models. Add this to degree-day and chill hour tracking for a comprehensive self-contained analysis tool.
Grape growers can avoid costly disease outbreaks with the Model 330's Powdery Mildew forecasting functions. Add this to degree-day and chill hour tracking for a comprehensive analysis tool.
WatchDog Retriever and Pup Weather Stations
Wireless sensor network that allows growers and researchers the ability to…
Applications for Plant Management
• Monitor frost temperatures for real-time decisions to protect crops
• Track soil moisture and EC in numerous locations for better irrigation practices
• Record temperature and humidity for decisions regarding disease and insect pressure
Retriever logs sensor data from its network of Pups (max 16 Pups per network).
Each Sensor Pup within the network is compatible with a diverse number of sensors and offers flexibility by allowing the grower to monitor the sensor inputs they require.
WatchDog Sensor Pups
WatchDog Station Pups