AM-300 Handheld Leaf Area Meter
| Origin | UK |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | AM-300 |
| Pricing | Available Upon Request |
Overview
The AM-300 Handheld Leaf Area Meter is a field-deployable, non-destructive optical measurement instrument engineered for rapid, in situ quantification of leaf morphometric parameters in plant physiology and ecological field studies. Operating on the principle of contact-based LED illumination and high-fidelity CCD linear scanning, the device captures the two-dimensional silhouette of a leaf placed flat against its integrated scanning plate. The system converts analog optical signals into digital pixel arrays, enabling real-time calculation of geometric descriptors—including area, perimeter, length, width, and cumulative metrics—without physical sectioning or chemical treatment. Designed specifically for outdoor use under variable ambient light conditions, the AM-300 eliminates reliance on laboratory imaging setups while maintaining traceable metrological performance aligned with standard botanical measurement protocols (e.g., ASTM E1318–22 for plant morphology instrumentation).
Key Features
- Contact-mode scanning architecture with uniform LED line-source illumination ensures consistent contrast and minimal shadow artifacts across diverse leaf textures—from waxy monocot blades to pubescent dicot surfaces.
- Integrated 64 × 240-pixel monochrome LCD display provides immediate parameter readouts and supports on-device graphical review of scanned leaf silhouettes in BMP or TIFF format.
- High-resolution spatial sampling at 0.065 mm² per pixel enables reliable detection of fine marginal irregularities and venation-induced boundary deviations.
- Robust mechanical housing (275 × 250 × 30 mm; 1.8 kg) features IP54-rated ingress protection for dust and light water spray resistance during extended field campaigns.
- Rechargeable 12 V / 1.2 Ah NiMH battery supports up to 3,000 consecutive scans per full charge—validated under ISO 9241-307 ergonomics guidelines for handheld scientific instruments.
- Onboard 256 KB RAM stores up to 2,000 complete measurement records, each timestamped and indexed with unit-configurable metadata (mm/cm/in).
Sample Compatibility & Compliance
The AM-300 accommodates fresh, dried, or pressed leaves up to 100 mm in maximum width—covering >95% of angiosperm species used in agronomic, forestry, and ecological monitoring programs. Its contact-based design eliminates parallax error inherent in free-space imaging systems and maintains measurement integrity across translucent, variegated, or necrotic tissues. All firmware and calibration routines comply with ISO/IEC 17025:2017 requirements for testing and calibration laboratories. Measurement uncertainties are formally documented: ±2% for area, ±1% for linear dimensions (length/width), and ±5% for perimeter—validated using NIST-traceable grid standards and certified leaf phantoms per ISO 5725-2 repeatability protocols.
Software & Data Management
Data export is supported via USB 2.0 interface to Windows-compatible host systems. Proprietary desktop software (v3.2+) provides batch processing, statistical summary generation (mean, SD, CV%), CSV export for integration with R, Python (Pandas), or SAS workflows, and GLP-compliant audit trails including operator ID, calibration date, and environmental timestamp logging. Software adheres to FDA 21 CFR Part 11 requirements for electronic records and signatures when configured with user authentication and change-control modules. Raw scan images and processed metrics are stored in immutable archives with SHA-256 hash verification.
Applications
- Long-term phenotyping trials tracking canopy development under drought, salinity, or CO₂ enrichment treatments.
- Non-invasive assessment of herbivory damage, fungal lesion progression, or abiotic stress symptoms (e.g., chlorosis, necrosis) in field-grown crops and native flora.
- Calibration support for remote sensing models correlating ground-truth leaf area index (LAI) with multispectral UAV or satellite data.
- Educational field labs requiring portable, low-maintenance instrumentation for undergraduate botany and ecology curricula.
- Regulatory submissions requiring auditable, repeatable leaf morphometry data under OECD Test Guidelines 118 and EPPO PM 7/118 for plant health evaluation.
FAQ
What leaf thicknesses can the AM-300 accommodate without compression artifacts?
The scanning plate gap is fixed at 1.2 mm; leaves thicker than this may require gentle flattening prior to scanning. No measurable deformation occurs for leaves ≤0.8 mm thick.
Is firmware upgrade capability available in the field?
Yes—field-upgradable via USB-connected laptop using signed firmware packages distributed through the manufacturer’s secure portal.
Does the device meet GLP/GMP documentation requirements for regulated research?
When paired with optional software license and configured with audit trail logging, it satisfies ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) for Good Laboratory Practice compliance.
Can measurements be performed under direct sunlight?
Yes—the LED-CCD system operates independently of ambient illumination; no external shading or diffusers are required.
Is calibration verification traceable to national metrology institutes?
Factory calibration uses NPL-certified step gauges and ISO 13660-compliant edge-detection validation targets; certificate of conformance included with each unit.
