SpotOn by Innoquest Quantum PAR Meter

SpotOn by Innoquest Quantum PAR Light Meter, Highly Accurate & Affordable

Forever Green Indoors

Regular price $ 349.95 $ 297.50 Sale


An affordable yet highly precise meter that provides scientifically accurate Photosynthetic Active Radiation (PAR) light readings under any light source including LED!

About SpotOn

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



  • 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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