Turf-Tec Light Meter for Quantum PAR - Spot On 
The Turf-Tec Light Meter for Quantum PAR by Spot On is an affordable light meter that provides scientifically accurate Photosynthetic Active Radiation (PAR) light readings. This meter is designed for measuring PAR light indoors and outdoors regardless of light source type. It works well for Golf Greens, Sports Fields, Stadiums, greenhouse, agricultural fields, and R&D applications requiring reliable plant growth light readings.
The chemical reaction of photosynthesis requires light. Unlike energy based light measurements, the quantum (quantity) of photons is measured since it can be directly tied to the number of these chemical reactions that can take place. The measure of all available light between the wavelength (color) range of 400 to 700 nanometers(nm) has been accepted as the best measure of light 
available for photosynthesis. This is defined as quantum Photosynthetic Active Radiation (PAR) in units of μmol m-2 s-1. This is referred to as PAR light, PPFD, PPF, and Quantum light interchangeably and is the total quantity of photons in μmoles over the light spectrum from 400 to 700 nm hitting a one-meter square area every second.
The Turf-Tec Light Meter for Quantum PAR by Spot On can also determine the total number of photons incident on one square meter over a 24-hour period. This is defined as the Daily Light Integral (DLI) and is displayed in moles per square meter per day. The typical range for DLI is 3 to 26 moles m-2 day-1. This is useful for understanding the average amount of light your cropseesin a day. One mole is equal to one million micromoles. 
* Provides accurate PAR light readings from ANY light source:
- Full sun to full shade indoors or outdoors
- Artificial light sources (LED, High Pressure Sodium, Metal Halide, Florescent, Halogen…)
* Three modes of operation:
- Instant Spot Measurement mode for PAR light readings.
- Scan mode for quickly averaging PAR over an area.
- DLI mode shows Daily Light Integral on the LCD (no computer needed).
* Compact and easy to use.
* Integral mounting plate for: stand, stake, lanyard & hanger hole, and magnet mounts.
* Small size allows light readings in tight spaces without needing an external sensor
* 1/4-20 threaded hole for mounting on camera tripods & stands
* Water & Impact resistant
* Includes sensor cover & soft carrying case
PAR Light |
0.0 to 6,500 µmol m-2 s-1 |
DLI (Daily Light Integral) |
0.0 to 560.0 moles m-2 day-1 |
Display Resolution: |
PAR Light 0.1 µmol m-2 s-1 from 0.0 to 99.9
1 µmol m-2 s-1 from 100 to 6,500
DLI 0.1 moles m-2 day-1 |
Accuracy: |
+/- 5% (Each meter is calibrated to a NIST traceable light sensor
on a broad-spectrum light source.) |
Azimuth Error: |
+/- 0.5% over 360° |
Daily Light Integral (DLI): |
Calculated continuously from light readings every 3 minutes |
Water Resistant: |
IP-65 rated for use in rain, irrigation, and condensing
environments (do not submerge) |
Operating Environment: |
32-130°F(0-55°C) with 0-100% RH (condensation ok) |
Battery: |
CR2032 3v coin cell lithium included (2-year battery life) |
Size & Weight: |
1.75in(4.5cm)W x 5.75in(14.6cm)L x .85in(1.8cm)D / 0.17lb(77g) |
Response Data: |
See Fig. 3 for Spectral Response Graph
See Fig. 4 |
Cosine Response Graph : |
(Red line is meter response; Black line is ideal response) |
Click here to order this product
1471 Capital Circle NW, Suite # 13
Tallahassee, FL 32303
Order Line (800) 258-7477
Phone (850) 580-4026
Fax (850) 580-4027
Copyright 2020