Do you study conifers, grasses, or other plants with narrow leaves that are difficult to analyze with standard porometers? Obtaining accurate, simultaneous measurements of stomatal conductance and chlorophyll fluorescence from these challenging samples has historically been slow and cumbersome. The LI-600N Porometer/Fluorometer from LI-COR is the first instrument specifically optimized for single needles, narrow leaves, and blades of grass. This lightweight, rugged device integrates both measurement capabilities into one powerful, field-portable system, enabling you to rapidly collect high-quality physiological data with built-in GPS and barcode tracking.

Why Choose the LI-600N Porometer/Fluorometer? Solving Challenges in Conifer & Grass Research

Gain deeper insights into plant function with features that directly address common pain points in ecological and agricultural research.

• Accurate Data from Difficult Leaf Morphologies: Standard porometer apertures are too large for narrow leaves, leading to inaccurate readings or edge-effect errors. The LI-600N porometer features a specialized aperture precisely engineered for samples with a width of 1–3.5 mm and a minimum length of 14.2 mm. This ensures that your measurements of stomatal conductance from needles and grasses are accurate and reliable, capturing the true physiological response.

• Simultaneous, Rapid Measurements for Higher Throughput: Time is precious, especially in the field. The LI-600N fluorometer acquires a complete chlorophyll fluorescence measurement (including parameters like Fv/Fm and ΦPSII) in just 1 second. Immediately following this, a porometer measurement takes only 5–15 seconds. This rapid, integrated workflow allows you to collect paired gas exchange and fluorescence data from many samples in a single field session, dramatically increasing your experimental throughput.

• Streamlined Field Workflows with Integrated Tools: Managing field data can be as challenging as collecting it. The LI-600N Porometer/Fluorometer simplifies this with a suite of built-in features. The integrated GPS (2.5 m accuracy) automatically geotags every measurement. The barcode scanner allows for rapid and error-free logging of sample IDs. All data is stored internally (128 MB) and can be easily exported as .txt, .csv, or .xlsx files for analysis on Windows or macOS.

• Rugged and Portable for Demanding Environments: Designed for the field, this plant physiology instrument is compact and lightweight (0.68–0.73 kg). Its durable construction withstands varied environmental conditions, and the sunlight-readable monochrome display ensures you can clearly see your data, even in direct sun. The long-life, quick-charge battery keeps you working all day.

Key Features for Advanced Plant Research

Engineered for precision, speed, and usability in the field:

• Dual Functionality: Measures both stomatal conductance (porometer) and key chlorophyll fluorescence parameters in a single, automated sequence.

• Optimized for Narrow Leaves: The only instrument with a sample aperture specifically designed for needles and grasses (1.0–3.5 mm wide).

• High-Precision Sensors:

• Relative Humidity: ±2%

• Reference Temperature: ±0.2°C

• Leaf Temperature: ±0.5°C

• Controlled Flow Rates: Three user-selectable flow rates (75, 115, and 150 µmol/s) to optimize measurements for different sample types and conditions.

• Powerful Fluorometer: Provides actinic light up to 7500 µmol m⁻² s⁻¹ and is exempt from photobiological hazard classifications (IEC 62471:2006).

• Comprehensive Data Tracking: Onboard GPS and barcode scanner eliminate manual note-taking and transcription errors.

Technical Specifications at a Glance

Product Identity & Core Function

• Product Name: LI-600N Porometer/Fluorometer

• Brand: LI-COR

• Primary Application: Simultaneous measurement of stomatal conductance and chlorophyll fluorescence, specifically optimized for needles, narrow leaves, and grasses.

• Target Users: Plant physiologists, ecologists, agronomists, forest researchers.

General & Environmental

• Operating Temperature: 0°C to 50°C

• Operating Pressure: 50 to 110 kPa

• Operating Humidity: 0–85% (non-condensing)

• Weight: 0.68 – 0.73 kg

• Display: Sunlight-readable monochrome

Porometer Specifications

• Leaf Compatibility (Width): 1.0 mm to 3.5 mm

• Leaf Compatibility (Length): ≥14.2 mm

• Measurement Time: 5–15 seconds

• Flow Rate Settings: Low (75 µmol/s), Medium (115 µmol/s), High (150 µmol/s)

• RH Accuracy: ±2%

• Reference Temperature Accuracy: ±0.2°C

• Leaf Temperature Sensor Accuracy: ±0.5°C

Fluorometer Specifications

• Measurement Time: 1 second

• Measured Parameters: Fo, Fm, Fv, Fv/Fm, Fs, Fm', ΦPSII, ETR

• Measuring Light Peak Wavelength: 625 nm

• Flash Intensity: 0 to 7500 µmol m⁻² s⁻¹

• Safety: Exempt from photobiological hazards per IEC 62471:2006

Power & Data Management

• Battery: Built-in 5200 mAh Li-ion; 8 hours operation

• Charging Time: 3.5 hours (standard); 2 hours with Qualcomm® Quick Charge™

• Internal Storage: 128 MB

• Data Formats: Text files (.txt, .csv) and Microsoft Excel (.xlsx)

• System Compatibility: Windows® and macOS®

• GPS Accuracy: 2.5 m

• Barcode Scanner: Yes (integrated)

Included & Optional Features

• Standard: GPS, Barcode Scanner, Sunlight-readable display

• Data Output: USB interface for data download

Ready to Advance Your Plant Physiology Research?

Stop struggling with tools not designed for your unique samples. The LI-600N delivers the precision, speed, and integrated data management you need to unlock new insights from conifers, grasses, and other challenging species.