PG300i

PG300i
Precision spectrometry for the future of horticulture.

A NEW ERA OF LIGHT INTELLIGENCE.

Light determines the direction of growth. Every plant responds to a unique combination of wavelengths, intensities, and spectral ratios. In modern horticulture, light is no longer a secondary factor. It has become one of the most critical variables in plant physiology. This is exactly why the PG300i was developed.

The PG300i is not a simple improvement of existing meters. It introduces an entirely new class of instrument: a compact and scientifically reliable VIS spectrometer that gives growers, researchers, and manufacturers complete confidence and control over their lighting environment. What once required complex tools or time-consuming analysis is now accessible, accurate, and immediately usable.

MAKING SCIENCE ACCESSIBLE, ONE MEASUREMENT AT A TIME

Every measurement performed by the PG300i, whether PPFD, PFD or a full spectral power distribution, is captured through a high-precision CCD sensor with a wavelength detection range from 350 to 800 nanometers. This range covers the full horticultural VIS spectrum and provides exceptional sensitivity in the regions that matter most for plant growth and development.

The instrument continuously optimizes its measurement stability through automatic shutter control and automatic dark calibration. This eliminates environmental variability that often leads to errors in less advanced systems. As a result, the PG300i delivers reproducible and trustworthy data, whether used in a controlled laboratory environment or in the dynamic conditions of active grow facilities.

ENGINEERED FOR TODAY’S HORTICULTURE PROFESSIONALS

Traditional spectrometers can be heavy, slow or unnecessarily complicated. The PG300i takes a different approach. It is compact, lightweight and remarkably intuitive. The user interface focuses only on what is essential: clear spectral graphs, precise numerical values and clean, logical navigation. It removes distractions and presents information in a way that supports fast decision-making. Users can choose a Standard Mode for quick, streamlined readings or an Expert Mode for more advanced analytical work. The PG300i adapts just as easily to a consultant in the field as to a researcher conducting controlled scientific trials. Because horticulture often requires measurements in elevated or restricted locations, the system also supports a wireless sensor that can be operated remotely. This makes it particularly suitable for multi-layer cultivation racks, greenhouse installations and overhead fixtures that cannot be accessed directly.

PG300i
Precision spectrometry for the
future of horticulture.

DATA THAT INSPIRES CONFIDENCE

Many measuring devices restrict access to data through proprietary software or locked ecosystems. The PG300i takes the opposite direction. All data can be exported directly to Excel, including full spectral graphs, PPFD and PFD results, detailed intensity distributions and advanced plant-physiological light parameters. This ensures transparent, shareable and reproducible analysis without the need for dedicated software. For integrated installations, the instrument supports MODBUS RS485 communication, enabling smooth connection with PLC systems in research labs, production lines and automated growing environments.

FOR PROFESSIONALS WHO REFUSE UNCERTAINTY

The PG300i is designed for those who require absolute reliability. Research laboratories, universities, lighting manufacturers, auditors, consultants, greenhouse operators and indoor farming pioneers will find the PG300i perfectly suited for environments where accuracy is essential. Its European calibration process, high-clarity 3.5 inch capacitive color display, long battery life and durable construction make it ready for continuous use in both scientific and commercial applications.

SUPPORT THAT MEETS PROFESSIONAL EXPECTATIONS

Every PG300i includes European calibration, a one-year standard warranty and lifetime firmware updates at no additional cost. For users seeking further protection, an optional three-year extended warranty and full product replacement insurance is available.

To ensure that every measurement receives the attention it deserves, users benefit from direct personal support from a specialist within 24 hours. Support is handled by engineers who understand the instrument, not by call centers.

WHAT COMES WITH THE PG300i

Each unit is delivered as a complete professional package that includes the instrument itself, a shock-resistant hardcase with a pressure valve, an aluminum tripod, an extended measurement stick with mounting bracket, a touch pen, a powerbank, a USB-C cable for data transfer and charging, a microfiber cleaning cloth and a QR label linking to OBSIDIAN instructional videos and manuals.

PG300i BECAUSE LIGHT IS THE KEY TO GROWTH

With the PG300i, science becomes practical, data becomes clear and growth becomes predictable. It is the ideal instrument for anyone who strives to understand, optimize and excel in today’s horticultural landscape.

THE POWER OF FREEDOM:
A remotely operated
detachable sensor head.

A BREAKTHROUGH IN OPTICAL MEASUREMENT

One of the most defining innovations within the PG300i ecosystem is the detachable sensor head, a breakthrough that fundamentally reshapes how professionals measure light. Instead of maneuvering an entire handheld instrument into place, users can position the sensor independently and operate it completely from the base platform. This creates a new level of freedom, precision and control that sets the PG300i apart from traditional spectrometers. What may appear as a convenience feature is, in practice, a transformative leap in workflow efficiency, measurement accuracy and user safety.

TRUE STAND ALONE FUNCTIONALITY

The sensor head is engineered as a fully capable stand alone unit. It can operate either wired or wireless depending on the user’s environment and needs. In a wired configuration, the USB C connection provides stable power and continuous data transfer. In wireless mode, Bluetooth communication enables precise measurements from a distance without any physical interaction. Regardless of how it is connected, the sensor maintains the same level of scientific reliability. It can be placed inside luminaires, within multi layer growing systems or directly at canopy height without moving the main device.

WIRELESS CONTROL FROM THE BASE PLATFORM

A defining advantage of the PG300i is that the detachable sensor head remains fully controllable from the base instrument. Users can initiate measurements, adjust settings and monitor real time data remotely. This capability allows readings in locations that are difficult, time consuming or unsafe to access. The PG300i becomes the central command platform, while the sensor acts as a precision satellite collecting data exactly where it matters most.

CONNECTIVITY BUILT FOR PROSESSIONAL ENVIRONMENTS

The detachable sensor head is equipped with a complete suite of modern communication options. Bluetooth supports wireless and mobile operation. USB C provides high speed data transfer and continuous power delivery. MODBUS RS485 makes integration with PLC systems and automated environments effortless. This range of connectivity positions the PG300i perfectly for scientific research, horticultural operations, quality control workflows and industrial monitoring.

OPTIMIZED FOR REAL WORLD MEASUREMENT SCENARIOS

To enhance its practical use, the detachable sensor head can be mounted on the included aluminum tripod for stable, fixed position measurements. For extended reach or overhead applications, the sensor can be positioned on the extended measuring stick with its dedicated bracket. This allows users to capture readings above cultivation tables, deep inside lighting structures or across vertical rack systems with minimal effort. When long duration measurements are required, the sensor head can be powered directly by the included powerbank, ensuring extended operation during prolonged research sessions, continuous monitoring or fieldwork away from fixed power sources. These accessories transform the sensor head into an adaptable, professional grade measurement tool capable of meeting any environmental challenge, from greenhouse aisles to laboratory setups and elevated lighting structures.

“This isn’t simply
a feature.
It’s the future of light
measurement.“

ACCESSING THE INACCESSIBLE

By separating the sensor from the main instrument, entirely new measurement possibilities emerge. Heights, confined spaces, delicate crop zones or heavily illuminated fixtures can be assessed safely and easily. The sensor goes directly to the light source while the user remains comfortably positioned at the base platform. This approach not only improves measurement accuracy but also significantly enhances safety, ergonomics and workflow efficiency.

A NEW STANDARD IN MEASUREMENT FLEXIBILITY

This modular architecture represents the core design philosophy of OBSIDIAN, which is freedom where it matters and precision where it counts. No competing system offers a detachable, remotely operated, stand alone sensor head with wireless control, industrial connectivity and full integration with tripod solutions, extension tools and portable power. The PG300i establishes a new benchmark for what professionals can expect from a spectrometer, an instrument that adapts effortlessly to the user, the application and the environment.

PRODUCT SPECIFICATIONS ( 350 nm to 800 nm )

Product specifications

Sensor High Precision CCD Sensor
Illuminance meter class Directional response conforms DIN 5032 Class B
Illuminance accuracy Class 1 ±3% (Class 1)
Wavelength Range 350 nm to 800 nm
Wavelengte Accuracy ±0.5 nm
Cosine corrector 15mm
Stray Light ≤ 0.5%
Spectral Bandwidth (FWHM) 2nm
Illuminance Range 5 lx – 200 klx
CCT Range 1,000 K – 100,000 K
X,Y repeatability ±0.0005
Chromaticity Coordinate Accuracy ±0.0025.
Integration Time 50 µs – 10,000 ms
Display 3.5-inch capacitive touchscreen display
Connectivity Bluetooth / USB-C / Modbus RS-485
Bluetooth connection distance sensor 0~10m (accessibility)
Storage capacity 4 gb
Product dimensions 138 x 61 x 23.4 mm
Device weight Device + sensor head: 194 g
Sensor head (separate) 70 g

MEASURED PARAMETERS

PPFD 400-700nm Photosynthetic Photon Flux Density
PFD 350-800nm Photon Flux Density
PFD-B 400-500nm Blue Photon Flux Density
PFD-G 500–600 nm Green Photon Flux Density
PFD-R 600–700 nm Red Photon Flux Density
PFD-FR 700-800nm Far-Red Photon Flux Density
UV-PFD 350-400nm Ultraviolet Photon Flux Density
ePAR 400-750nm Extended Photosynthetically Active Radiation
PBAR 350-800nm Photosynthetically Biologically Active Radiation
PFD-Y Custom 350-800nm Custom Spectral Photon Flux Density
Custom Spectral Photon Flux Density Custom Spectral Photon Flux Density
Ech-B (Eₐ,Chl-b) Chlorophyll-b Weighted Irradiance
PSS Phytochrome Photostationary State
KPPFV (µmol) Kilophoton Photosynthetic Flux Value
DLI (mol/m²/day) DLI (mol/m²/day)
IRR (W/m²) Irradiance
LUX – Eᵥ (lx) Illuminance
CCT (K) Correlated Color Temperature
CRI Color Rendering Index
R1–R15 CIE General Color Rendering Indices
Fc (fc) Footcandle
S/P Ratio Scotopic/Photopic Ratio
λₚ Peak Wavelength
λₚ(V) Peak Wavelength (Photopic Weighted)
λ_d Dominant Wavelength
D_uv Distance from Planckian Locus
CLI (mol/m²) Cumulative Light Integral
SDCM Standard Deviation of Color Matching
Purity (pₑ) Excitation Purity
FWHM (Δλ₁/₂) Full Width at Half Maximum
YPFD Yield Photon Flux Density
IRR-C Circadian-weighted irradiance
COC (nm) Centroid wavelength
CWL Center Wavelength

Ratios

B:G Ratio Blue-to-Green Ratio.
R:FR ratio Red-to-Far-Red Ratio.
R:FR = 1:x Ratio Red-to-Far-Red Ratio expressed as 1:x
PAR-B (%) 400–500 nm Blue Percentage of PAR
PAR-G (%) 500–600 nm Green Percentage of PAR
PAR-R (%) 600–700 nm Red Percentage of PAR
PAR-FR (%) 700–800 nm Far-Red relative to PAR

Reference Spectra

Chlorophyll A Chlorophyll A Absorption Spectrum
Chlorophyll B Chlorophyll B Absorption Spectrum
Beta-Carotene Beta-Carotene Absorption Spectrum
Zeaxanthin Zeaxanthin Absorption Spectrum
Anthocyanin Anthocyanin Absorption Spectrum
Phytochrome Pr Phytochrome Red Inactive Form
Phytochrome Pfr Phytochrome Far-Red Active Form
Cryptochrome Cryptochrome Action Spectrum
LOV Light Oxygen Voltage
Phycoerythrin Phycoerythrin Absorption Spectrum
Phycocyanin Phycocyanin Absorption Spectrum
Allophycocyanin Allophycocyanin Absorption Spectrum
Phytochrome A far red Phytochrome A Far-Red State Spectrum
Phytochrome A red Phytochrome A Red State Spectrum

Flicker & Frequencies

Flicker Risk - IEEE PAR1789 IEEE 1789 Flicker Risk Assessment
Flicker Index Flicker Index
Flicker percentage Percent Flicker (Modulation Depth)
Frequency (Hz) Flicker Frequency
DutyCycle % Duty Cycle
Flickercycle (ms) Flicker Period

Color Rendering / Fidelity

Rf / Rg (TM-30) IES TM-30 Color Fidelity and Gamut Indices
x, y (CIE 1931) CIE 1931 Chromaticity Coordinates
u′, v′ (CIE 1976) CIE 1976 UCS Chromaticity Coordinates
u, v (CIE 1960) CIE 1960 UCS Chromaticity Coordinates

A Complete Measurement ECoSystem, Protected and Ready to go

Every OBSIDIAN instrument is delivered in a rugged, pressurised protective case designed to safeguard precision equipment in demanding environments. The case is engineered to provide maximum protection during transport, storage and field use, ensuring that the spectrometer remains stable and reliable wherever measurements are performed. The integrated pressure valve allows safe air pressure equalisation, making the case suitable for travel and variable environmental conditions.

Inside the case, the OBSIDIAN spectrometer is securely positioned alongside a carefully selected set of essential accessories. The included tripod enables stable and repeatable measurements in fixed positions, while the extended measurement stick allows effortless access to elevated or hard to reach light sources. When equipped with the detachable wireless Bluetooth sensor, the extended measurement stick enables fully wireless measurements, allowing the sensor to be positioned precisely where the light is measured while the instrument is operated remotely.

For extended field sessions and long duration measurements, the included powerbank ensures uninterrupted operation without reliance on external power. A dedicated touch pen is included for precise and comfortable operation of the touchscreen in any environment, while a microfiber cleaning cloth allows the instrument and display to be cleaned and maintained with care.

Together, these components elevate the OBSIDIAN spectrometer into far more than a regular measuring instrument. It becomes a fully integrated, mobile measurement solution designed for real world professional use. From transport and setup to long duration field measurements and advanced remote operation, every element works together to ensure reliability, flexibility and precision wherever light needs to be understood.

PG300i Precision spectrometry for the future of horticulture.