Illuminance / Irradiance Probes

Quickly and accurately measure the light falling on any surface

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Probes to Measure Illuminance or Irradiance

There are different optical quantities and a range of different measurement geometries that require the use of dedicated probes. As a full line manufacturer, we offer a variety of optical probes for photometric and radiometric measurements that differ in spectral range, degree of cosine correction and a type of optic fiber.

Irradiance and illuminance probes are available for all our spectrometers, and designed for each system based on the spectral range and optical performance of the instrument.

Ready-set-go

Each complete set includes a measuring probe, a fiber optic cable, and adapter for a dedicated spectrometer. Includes calibration traceable to National Laboratories.

Smart Detection

All GL Optic Spectrometers include smart system of detection that automatically detects a new probe and loads the appropriate calibration file.

Made For Everyday Use

High accuracy and performance no longer also mean high complexity. Our solutions deliver reliable, repeatable results without needing highly specialized operators.

GL Opti Probe 1.1.10 Illuminance Usage

Submersible illuminance/irradiance probe for underwater measurements. The set includes a measuring probe, polymer fiber optics as well as an adapter with a coder for a SPECTIS 1.0 series spectrometer. The set can be spectrally calibrated only in a range above 400 nm. N.A.= 0.22

This optic probe measures the amount of luminous flux incident upon a surface per unit area, measured in optical quantities of illuminance [lux] or PAR energy [W/m²].

GL OPTI PROBES Specifications

GL Opti Probe 1.1.10 Illuminance
Measuring point diameter7.9mm
Spot size
Spectral range400-730nm (may be further affected by spectrometer)
Measuring probe size44 x 62 x 14mm
Type of fiber optic cablePolymer
Fiber optic cable diameter⌀1.0mm
Fiber optic cable length1.5m
Measurement uncertainty(x,y) +/- 0.002

GL Opti Probe 5.1.10 Usage

Irradiance / Illuminance diffuser with quartz glass fiber optic for extended spectral irradiance measurements. The set includes a measuring probe, quartz fiber optics as well as an adapter with a coder for SPECTIS 1.0 series spectrometers. This probe covers the full spectral range from UV to IR within the range used by the spectrometer. N.A.=0.20

Opti Probe 5.1.10 Specifications

GL OPTI Probe 5.1.10 irradiance/illuminance
Measuring point diameter10mm
Spot size
Spectral range340–780 nm (may be further affected by the spectrometer used)
Measuring probe sizeØ 40 x 19 mm
Type of fiber optic cableQuartz
Fiber optic cable diameter⌀1.0mm
Fiber optic cable length1.5m
Measurement uncertainty(x,y) +/- 0.002

GL Opti Probe 5.1.50 Usage

Irradiance / Illuminance diffuser with quartz glass fiber optic for extended spectral irradiance measurements. The set includes a measuring probe, quartz fiber optics as well as an adapter with a coder for SPECTIS 5.0, 6.0 and 8.0 spectrometers. This probe covers the full spectral range from UV to IR within the range of the spectrometer used. N.A.=0.20

Opti Probe 5.1.50 Specifications

GL OPTI Probe 5.1.50 irradiance/illuminance
Measuring point diameter10mm
Spot size
Spectral range200–1050 nm (may be further affected by spectrometer used)
Measuring probe sizeØ 40 x 19 mm
Type of fiber optic cableQuartz
Fiber optic cable diameter⌀1.0mm
Fiber optic cable length1.5m
Measurement uncertainty(x,y) +/- 0.002

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