The LPS11 Albedometer represents the pinnacle of accuracy in solar radiation measurement. This instrument integrates two ISO 9060:2018 Class A thermopile pyranometers to provide unparalleled precision in measuring both incident and reflected solar energy. Designed for scientific-grade applications in climatology, environmental research, and high-accuracy AWS networks, its passive operation, integrated leveling, and robust IP67 design ensure reliable, maintenance-free collection of critical data for calculating albedo and net radiation.
The Gold Standard for Scientific Solar Measurement
The LPS11 Albedometer is engineered for research institutions and national meteorological services where data accuracy is non-negotiable. By combining two matched Spectrally Flat Class A pyranometers—the highest classification under ISO 9060:2018—it delivers exceptionally precise and reliable measurements of global and reflected solar irradiance. This level of accuracy is essential for critical applications such as climate change research, validation of satellite data, and precise energy balance studies where even minor errors can significantly impact model outcomes.
Uncompromising Precision for Demanding Environments
Every aspect of the LPS11 is designed to minimize measurement uncertainty. Its fast response time (<5s) captures rapid solar transients, while its superior spectral flatness and minimal directional, temperature, and tilt errors ensure consistency across all operating conditions. The instrument's passive, zero-power design is not just a feature of convenience; it eliminates a potential source of error and heat generation, guaranteeing that the signals you receive are purely from the sun, not the instrument itself.
Key Advantages & Features
- Dual Class A Accuracy: Features two Spectrally Flat Class A pyranometers (ISO 9060:2018), offering the highest level of measurement precision available for scientific applications.
- Exceptional Performance Metrics: Boasts a fast response time (<5s), extremely low non-linearity (<±0.2%), and minimal directional and spectral errors for unmatched data fidelity.
- Passive & Maintenance-Free Operation: Requires no external power, ensuring flawless operation in remote, long-term deployments without the need for maintenance or battery changes.
- Integrated Precision Leveling: A high-accuracy bubble level (<0.2°) is built-in to guarantee perfect horizontal alignment during installation, a critical step for valid albedo calculation.
- Individually Calibrated: Each unit is supplied with a factory calibration report and an optional ISO 17025 certificate is available, providing full traceability to WRR standards.
Measures & How to Use
- Primary Application: Ideal for high-accuracy climate research, baseline surface radiation network (BSRN) stations, satellite data verification, and advanced agricultural science.
- Install the unit on a stable mast in a completely open area to avoid shadowing. Use the integrated bubble level for a perfectly horizontal setup.
- Connect the upward and downward sensors to a high-precision data logger using the separate 2.5-pole M12 connectors and appropriate shielded cables (ordered separately).
- The instrument outputs a analog millivolt (mV) signal. Use the unique, high-accuracy calibration factors from the provided report to convert to W/m².
- Calculate precise Albedo (α) = (Reflected Radiation / Incident Radiation). Derive Net Radiation (Rnet) = Incident - Reflected.
| Parameter | Specification |
|---|---|
| Sensor | |
| Type | Thermopile (x2) |
| Classification | Spectrally Flat Class A (ISO 9060:2018) |
| Measuring Range | -200 to +4000 W/m² |
| Typical Sensitivity | 6...15 μV/(W/m²) |
| Spectral Range (50%) | 283 to 2800 nm |
| Viewing Angle | 2π sr (180°) |
| Performance (ISO 9060:2018 Class A) | |
| Response Time (95%) | < 5 s |
| Non-linearity | < ±0.2 % |
| Directional Response | < ±10 W/m² |
| Spectral Error | < ±0.2 % |
| Temperature Response (-10…+40 °C) | < ±0.5 % |
| Tilt Response | < ±0.2 % |
| General | |
| Output | Passive analog signal in mV |
| Connection | Two 2.5-pole M12 connectors (one per pyranometer) |
| Power Supply | Not required (passive) |
| Operating Temperature | -40 to +80 °C; 0 to 100% RH |
| Protection Degree | IP67 |
| Housing Material | Anodized Aluminum |
| Dome Material | Optical Glass |
| Weight | 1.4 kg (approx.) |
| Bubble Level Accuracy | < 0.2° |
| MTBF | > 10 years |
| Brand | Senseca |
