Product Overview
The OHTS1096 is a total solar radiation measurement device based on the photoelectric effect principle, designed for precise measurement of global solar irradiance across the solar spectrum. This sensor employs a wide-spectral-response photosensitive element featuring high sensitivity and stability with excellent full-spectrum absorption characteristics.
The sensor is equipped with an optical-grade transparent dust shield on top, offering 95% transmittance and featuring a special anti-adhesion surface treatment to effectively suppress dust accumulation and minimize environmental interference with measurement accuracy. The device utilizes the standard ModBus-RTU communication protocol with RS-485 digital output, directly providing current solar radiation measurements. Its compact structure incorporates a leveling mechanism to facilitate field installation and commissioning.
Features
High-Precision Photoelectric Sensor: Wide-spectral-response photosensitive element with high quantum efficiency and flat spectral response across a wide spectral range ensures accurate measurement of global solar radiation.
Advanced Dust Shield Design: High-transmittance optical dust shield with 95% transmittance and special surface treatment reduces electrostatic dust adsorption, maintaining measurement accuracy in outdoor environments.
Flexible Communication Interface: Standard ModBus-RTU protocol over RS-485 interface ensures compatibility with industrial automation systems, with optional analog outputs (4 - 20 mA, 0 - 5 V, 0 - 10 V) available.
Field-Friendly Installation: Integrated spirit level and mechanical adjustment mechanism with thumb screws supports rapid field leveling calibration without specialized tools.
Robust Environmental Adaptability: Aluminum alloy enclosure provides excellent durability and electromagnetic shielding performance, suitable for continuous outdoor operation in temperatures ranging from -25 °C to 60 °C.
Applications
- Performance monitoring and evaluation of solar photovoltaic power generation systems
- Solar radiation flux observation at meteorological stations
- Photosynthetically Active Radiation (PAR) measurement in agricultural ecosystems
- Outdoor aging testing and weather resistance evaluation of building materials
- Atmospheric environmental monitoring and climate research
- Greenhouse illumination intensity monitoring
- Renewable energy resource survey
Technical Specifications
| Parameter | Specification | Remarks |
|---|---|---|
| Supply Voltage Range | 7 V ~ 30 V DC | DC Input |
| Power Consumption | 0.06 W | Typical value |
| Operating Temperature | -25 °C ~ 60 °C | Ambient temperature |
| Measurement Target | Sunlight | Global radiation |
| Measurement Range | 0 ~ 1800 W/m² | Full scale |
| Resolution | 1 W/m² | Minimum resolvable unit |
| Response Time | Less than or equal to 10 s | 90% response |
| Non-linearity Error | Less than ± 3% | Full scale |
| Annual Stability | Less than or equal to ± 3% | Long-term drift |
| Output Interface | RS-485 | ModBus-RTU protocol |
| Optional Output | 4 - 20 mA / 0 - 5 V / 0 - 10 V | Analog output |
| Baud Rate | 2400/4800/9600 bit/s | Configurable, default 4800 bit/s |
| Device Address | 1 ~ 254 | Configurable, default 1 |
| Dust Shield Transmittance | 95% | Optical transmittance |
Physical Specifications
| Parameter | Specification |
|---|---|
| Enclosure Material | Aluminum Alloy |
| Protection Rating | Suitable for outdoor use |
| Mounting Method | Screw fixation, φ mounting hole |
| Leveling Adjustment | Built-in spirit level, thumb screw adjustment |
FAQ
Q: What measurement principle does the OHTS1096 use?
A: The OHTS1096 is based on the photoelectric effect principle, utilizing a wide-spectral-response photosensitive element to measure global solar irradiance across the solar spectrum.
Q: How should I maintain the optical dust shield?
A: The dust shield surface must remain clean and should be regularly wiped with a soft cloth. Do not arbitrarily disassemble the transparent dust shield as the sensor is a precision optical device.
Q: What are the power supply requirements?
A: The device requires DC 7 V to 30 V input power with typical power consumption of 0.06 W. Always verify all connections are correct before applying power and avoid wiring operations in energized states.
Q: Is the device waterproof?
A: Water ingress into the dust shield interior is strictly prohibited. During severe weather conditions such as heavy rain, snowstorms, or freezing conditions, it is recommended to install a protective cover or suspend use.
Q: What should I check if readings remain at 0?
A: Verify the presence of light source and ensure the protective cover has been removed after installation. Check RS-485 bus connection integrity and correct A/B wire sequence, and verify supply voltage is within the 7 V to 30 V DC range.