International: +1.815.337.8555
US: 1.800.637.1623

SpotOn® External PAR Sensor

$375.00 US List Price

Item Number: 38880
One year warranty

An affordable sensor that provides scientifically accurate photosynthetic active radiation (PAR) light readings under any light source including LED!



SpotOn® Sensor Technology

SpotOn® Sensor Technology is a proprietary filter stack coupled with an integrating light sensor to provide a flat PAR response from 400 to 700 nm under both natural and artificial light sources.

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…).

Integral bulls eye level for easy setup with included spring-loaded jack screws.


Includes all mounting hardware (screws, U-bolt, 90° bracket, and cable ties).

Range: 0 to 3,000 µmol m-2 s-1
Ourput: 0 to 3.0 volts corresponding to 0 to 3,000 µmol with linear relationship. Valid output 4ms after power on. With continuous power reading is updated every 6.5s.
Input Power 3.00 volts Regulated
Power Draw: 1.3 mA
Accuracy: +/- 5% (each sensor is calibrated to a NIST traceable light sensor on a broad-spectrum light source)
Azimuth Error: +/- 1% over 360°
Water Resistant: IP-65 rated for outdoor use
Operating Environment:0-130°F(-18°C) with 0-100% RH
Sensor Cable: 6ft (1.8m) shielded cable with 2.5mm Stereo Plug
Size & Weight: 2.5in(6.4cm) Día x 1.08in(2.8cm) H 0.25lb (113g)
Response Data:Spectral Response

Cosine Response


We work with dealers and wholesalers worldwide and are continually adding to our list of partners. Please contact us to learn more about our product lines and get details about working with us.