SpotOn Quantum Photosynthetic Active Radiation (35650) Light Meter
UNDERSTANDING PAR LIGHT:
This meter is designed for measuring PAR light
indoors and outdoors regardless of light source type. It works well for
greenhouse, field, 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. One micromole is equal to 602,214,085,700,000,000
photons of light! This is not the same as foot candle or lux measurements
Affordable, compact and easy-to-use, this meter provides
scientifically accurate Photosynthetic Active Radiation (PAR) light
readings under any light source including LED! Three modes of
operation include Instant Spot Measurement mode for PAR light
readings; Scan mode for quickly averaging PAR over an area; and DLI
mode that shows Daily Light Integral on the LCD (no computer
needed). Water- and impact-resistant. Integral mounting plate allows
the meter to stand, stake or hang with a lanyard.
- Provides accurate PAR light readings from ANY light source:
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
- 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
- Small size allows light readings in tight spaces without needing an
- ¼-20 threaded hole for mounting on camera tripods & stands.
- Water and impact resistant.
0.0 to 6,500 μmol m-2 s-1
DLI (Daily Light Integral):
0.0 to 560.0 moles m-2 day-1
0.1 μmol m-2 s-1 from 0.0 to 99.9
1 μmol m-2 s-1
from 100 to 6,500
0.1 moles m-2 day-1
||+/- 5% (each meter is calibrated to a NIST traceable light sensor on
a broad-spectrum light source)
||+/- 1% over 360°
|Daily Light Integral (DLI):
||Calculated continuously from light readings every 3 minutes
||IP-65 rated for use in rain, irrigation, and condensing environments
(do not submerge)
||32-130°F(0-55°C) with 0-100% RH condensing ok
||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
- Sensor cover.
- Soft carrying case.