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SpotOn Quantum PAR Light Meter


Provides accurate PAR light readings from ANY light source:

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.
Water and impact resistant.
Integral mounting plate for: stand, stake, lanyard & hanger hole, and magnet mounts.
1/4″-20 threaded hole for mounting on camera tripods and stands.
Includes battery, sensor cover, and soft carrying case.

Cosine Graph Spectral Graph

Range 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 (condensation ok)
Battery CR2032 3v coin cell lithium included (2-year battery life)
Dimensions 1.75in (4.5cm) W x 5.75in (14.6cm) L x 0.85in (1.8cm) D
Weight 0.17lb (77g)

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Product Stats

Weight0.17 lbs
Dimensions1.75 × 5.75 × 0.85 in