The LI-Cor LI-1800 Portable Spectroradiometer is a microprocessor-controlled, battery-operated instrument for rapid acquisition of spectroradiometric, radiometric, and photometric data in field environments. Engineered for solar radiation and reflected-light measurement, it combines a scanning monochromator with silicon photodiode detection to deliver wavelength-resolved spectral analysis across the UV-visible-NIR range. The instrument integrates data logging, real-time battery monitoring, and motor-driven filter wheel control for rapid field deployment in plant physiology, remote sensing, and environmental monitoring applications.
Technical Specifications
• Wavelength Range: 300 nm to 850 nm (standard); optional extension to 1100 nm
• Scanning Intervals: 1 nm, 2 nm, 5 nm, or 10 nm (selectable)
• Spectral Bandwidth: 4 nm half-power bandwidth; 8 nm total bandwidth (with 1/2 mm slits)
• Detector: Silicon photodiode in photovoltaic mode
• Optical Receptor: PTFE-dome cosine corrector, 180° (2π steradian) field of view
• Monochromator: Holographic grating with motor-driven scanning
• Filter Wheel: Seven interference filters plus opaque target for stray-light rejection and dark-signal capture
• Data Storage: 512 KB internal RAM organized in sixteen 32 KB banks; approximately 600 full scans (350–850 nm at 2 nm resolution) per memory fill
• Power: Internal rechargeable battery with voltage monitoring; line voltage operation available
– Key Features
• Motor-driven wavelength scanning with real-time digitization and storage
• Factory calibration with recalibration capability via LI-COR 1800-02 Optical Radiation Calibrator
• High wavelength accuracy and precision photodiode measurements
• Seven-position filter wheel for spectral filtering and measurement validation
• Battery status monitoring and line-voltage compatibility for extended field operations
– Interfaces & Integration
• RS-232C serial output via flat ribbon cable (1000-04: 25-pin M/F connectors)
• Optional RS-232C cable (1800-04) for printer or external device connection
• PC1800 data transfer software
• WIN1800 Terminal Emulator and Graphics software (Windows) compatible with firmware version 4.00 and above (LI-1800 serial number 139+)
• Terminal device connection provision
