SpotOn Quantum PAR Meter Measures Photosythetic Light Levels On Plants. DLI Mode Included.

SpotOn Quantum Par Meter, DLI Mode, Scientific-grade accuracy for all light sources including LED


Regular price $ 350.00 $ 333.25 Sale

An affordable yet highly precise meter that provides scientifically accurate Photosynthetic Active Radiation (PAR) light readings under any light source including LED! (Wand available as a separate purchase). 

Research-grade quantum PAR measurement by Innoquest.

Accurate PPFD 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). 

Additional Benefits/Features 

Compact and easy to use

Water and impact resistant

Integral mounting plate acts as a stand, or can be used as a stake. Also includes lanyard or hanger hole for suspending the meter, and magnet mounts.

1/4-20 threaded hole for mounting on tripod or extension wands, selfie sticks. 

Includes and sensor cover and soft carry pouch. 

SpotOn PAR Meter Spectral Range Chart

Spot On Spectral Range Chart 

SpotOn Par Meter Cosine Graph

Cosine Response Graph

Unboxing Video

SpotOn Compared to Scientific Quantum PAR Sensor Readings Under LED



  • 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: +/- 1% 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 condensing 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

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