1- Key Product Features
Accurate Measurement of Photosynthetically Active Radiation (PAR): Specialized measurement of light in the 400 to 700 nm spectrum (specifically for plant growth).
Wide Measurement Range: Capability to measure photon flux density (PPFD) from 0 to 5000 micromoles per square meter per second (μmol/m²/sec).
High Accuracy and Repeatability: Very low measurement error with repeatability of ±1 μmol/m²/sec.
Data Logging Capability: Ability to store up to 100 measured data points for review and comparison.
Ergonomic and Practical Design: Equipped with a large display, tripod mount capability, and easy operation.
Smart Calculation Functions: Displays minimum (Min), maximum (Max), and average (AVG) values with data hold function.
2- Brief and Concise Product Description
The digital PAR meter and plant growth light tester is an essential tool for professional greenhouse growers, agricultural researchers, and indoor plant enthusiasts. Unlike ordinary lux meters that measure light intensity based on human eye sensitivity, this device measures the photosynthetically active radiation (PAR); that is, precisely the portion of light that plants need for photosynthesis and growth.
Using this device, you can accurately measure the photon flux density (PPFD) reaching the plant leaf surface within the 400 to 700 nm light spectrum. This tool helps you identify the best location for planting or placing pots, optimize the height of grow lights, and ensure maximum health and productivity of your crops.
3- Product Technical Specifications Table
Parameter
Technical Specifications
Device Type
PAR Meter / PPFD Tester
Measurement Range
0 to 5000 μmol/m²/sec
Wavelength Spectrum
400 to 700 nanometers (visible light effective for plants)
Cut-On/Off Wavelength
400±10nm / 700±10nm
Repeatability
±1 μmol/m²/sec
Measurement Rate
1 time per second
Display Resolution
0.01 (range 0-99) / 0.1 (range 100-999) / 1 (range 1000-5000)
Memory Capacity
Records 100 data entries
Power Source
2 AAA 1.5V batteries
Body Material
ABS hard plastic
Tripod Mount Capability
Yes (standard socket)
Dimensions
115 × 60 × 24 mm
Weight
Approximately 115 grams (without batteries)
4- Comprehensive Introduction and Expert Analysis of the PAR Meter
In modern agriculture and plant cultivation under artificial light, knowing "how bright the light is" is not enough; we must know "how much useful light reaches the plant." This section provides a detailed review of this device and the importance of measuring PPFD.
Critical Difference Between PAR and Lux in Plant Cultivation
The human eye is more sensitive to green and yellow colors, and lux meters are designed accordingly. However, plants primarily need blue and red spectra for photosynthesis. This device measures PAR (Photosynthetically Active Radiation) in the 400 to 700 nm range, counting exactly the photons absorbed by plant chlorophyll. Using this device prevents the common mistake of growers relying on lux meters to adjust grow lights.
High Accuracy in Measuring PPFD
The PPFD (Photosynthetic Photon Flux Density) parameter is the standard unit indicating how many photons hit one square meter of leaf surface per second. This device, with a wide range of 0 to 5000 micromoles, can accurately analyze environments from low light (such as mushroom cultivation or shade-loving plants) to very bright conditions (like direct midday summer sunlight). The fast sampling rate (one second) allows users to monitor real-time light fluctuations.
Easy Operation and Professional Features
The design of this device is based on practical use in real environments. The tripod mount socket eliminates hand shake during measurement, providing precise data. The large, high-visibility display makes viewing Min/Max/Avg parameters easy. Also, the ability to log 100 data points enables users to map the light distribution (Light Map) of their greenhouse or growth room and identify dark or overly bright spots.
Optimizing Energy Use and Plant Health
One of the most important uses of this light analyzer is adjusting the distance of grow lights. Insufficient light causes leggy growth and weak stems, while excessive light (beyond the light saturation point) causes leaf burn and photosynthesis inhibition. With this tool, you can set the light height exactly where the plant grows best and avoid wasting electricity.
5- Target Customers
Industrial and Commercial Greenhouse Growers: To uniformize light across the entire facility and increase crop efficiency.
Indoor and Specialty Plant Growers: Those using grow boxes or artificial light for ornamental, medicinal, or vegetable plants.
Agricultural Researchers and Students: For research projects, theses, and plant physiology studies.
Grow Light Manufacturers and Sellers: To test quality and provide precise product specifications to customers.
Landscape Designers and Gardeners: To measure ambient light in yards and gardens for selecting suitable plant species for each location.
6- Buying Guide and Key Points
What is PPFD and why is it more important than Lux?
PPFD (Photosynthetic Photon Flux Density) counts the actual photons plants can use for photosynthesis. Lux only measures brightness based on human vision, which is not an accurate criterion for plants. PPFD is the main standard for plant growth.
Is this device suitable for measuring sunlight and LED lamps?
Yes, this device can measure the full light spectrum from 400 to 700 nm and is fully suitable for measuring natural sunlight and all types of plant grow lights (LED, HPS, fluorescent).
What is the suitable PPFD range for different plants?
This number varies by plant type. Generally, shade-loving plants need 100-200, common indoor plants 200-400, and fruiting or light-loving plants require values above 500 to 1000 micromoles per square meter per second.
Does the device require calibration?
The device is factory-calibrated. Given stable digital sensors, frequent calibration is not necessary for normal use, but annual calibration is recommended for precise research applications.
What does "Cut-off Wavelength" mean in the specifications?
This parameter indicates the device's optical filters that ensure the sensor only responds to light useful for plants (400 to 700 nm) and excludes infrared or ultraviolet wavelengths that do not play a primary role in photosynthesis from the PPFD calculation.
Esfahan
