OS1P Chlorophyll Fluorometer

The OS1P pulse-modulated Chlorophyll Fluorometer sets a new standard for portable, research-grade chlorophyll fluorescence measurements. Designed for reliable plant stress evaluation using both light and dark-adapted tests, the OS1P offers rapid, precise measurements critical for plant scientists.

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  • OS1P measuring wheat with a PAR clip
  • OS1P measuring wheat with a PAR clip
  • OS1P measuring a tree with a PAR clip
  • OS1P showing a Y(II) screen

    • How it works

    The OS1P utilizes pulse-modulated fluorescence technology, measuring fluorescence emitted from Photosystem II (PSII) in plants.

    It assesses plant health by calculating parameters such as quantum yield (Y(II)), maximum quantum yield (FV/FM), electron transport rate (ETR), and photochemical and non-photochemical quenching through advanced protocols.

    The fluorometer’s saturation pulse, modulated, actinic, and far‑red LED lights ensure accurate, repeatable measurements.

    Applications

    • Early detection of various plant stresses (drought, nutrient deficiencies, temperature stress)
    • Agricultural and ecological research
    • Aquatic and terrestrial plant stress studies
    • Photosynthesis research and education
    • Forestry and conservation studies

    Key features

    • Pulse-Modulated Fluorescence Technology:
      High precision in measuring both dark and light adapted chlorophyll fluorescence under varied field and lab conditions.
    • Stable Actinic Light Source:
      Provides consistent illumination intensity required for reliable quenching and rapid light curve measurements.
    • Optional Innovative PAR Clip:
      Includes a cosine-corrected PAR sensor and precise leaf temperature measurement for accurate assessment under natural or artificial illumination.
    • Advanced Protocols Included:
      FV/FM, Y(II), FV/FO, rapid light curves (RLC), and Hendrickson simplified lake model quenching with Non-Photochemical Quenching (NPQ).
    • User-Friendly Interface:
      Equipped with a high-resolution colour graphic touchscreen and intuitive, menu-driven software for ease of operation.
    • Automated Modulation Light Intensity:
      Automatically adjusts modulated light intensity, minimizing user error and ensuring measurement accuracy.
    • Multi-Flash FM’ Correction:
      Corrects fluorescence measurements under high light conditions using the Loriaux (2013) method, ensuring accuracy in high-light environments.
    • Extensive Data Management:
      Features USB connectivity, MMC/SD card storage, and 1GB of internal non-volatile flash memory, ensuring secure, easily accessible data management.

    Take the next step

    Advance your plant stress research with the OS1P Chlorophyll Fluorometer. Contact us to schedule a demonstration, request further information, or place an order today.

    View documentation

    Resources

    • Measured Parameters: FV/FM, Y(II), FV/FO, ETR, PAR, leaf temperature, rapid light curves, and various quenching parameters.
    • Saturation Pulse Intensity: Up to 11,000 µmol m-2 s-1 (white LED, 690 nm short-pass filter)
    • Actinic Light Intensity: Adjustable to 3,000 µmol m-2 s-1 (white LED)
    • Modulated Light Source: 660 nm LED, intensity auto‑adjustable
    • Far-Red Light Source: Wavelengths above 740 nm
    • Detection Method: Pulse-modulated with a PIN photodiode (700-750 nm bandpass filter)
    • Sampling Rate: Auto-switching from 10 to 10,000 points per second
    • Test Duration: Adjustable from 0.1 seconds to 12 hours
    • Data Storage: 1GB internal non-volatile memory; MMC/SD card supported
    • Display: High-resolution graphic colour touchscreen
    • Connectivity: USB port for data transfer
    • Operating Temperature: 0-50 °C
    • Power Supply: Internal rechargeable NiMH battery, 12 V
    • Battery Life: 8-12 hours continuous operation
    • Dimensions: 17.8 cm x 14 cm x 8.3 cm (7 x 5.5 x 3.25 inches)
    • Weight: 1.36 kg (including fibre optic probe); 1.62 kg (with PAR Clip)
    • Included Components: OS1P fluorometer, fibre optic probe, battery charger, dark-adaptation cuvettes, USB cable, SD card, carrying case, user manual

    Technical documents

    OS1P Operating Manual

    Product brochure

    OS1P Brochure

    References

    OS1P Publications List
    Google Scholar Search

    Orders / enquiries

    Please see the Contact page or complete the enquiry form below.

    Alternatively you can contact our international Distribution & Support Centres.