A sunlight sensor that provides accurate radiation measurements under any weather conditions.
■Measurement of sunshine duration based on the WMO-defined threshold of 120 W/m² ■RS485, voltage analog, voltage digital, SDI-12, contact output ■Measured with a photodiode array positioned at a specific location ■High measurement reliability is ensured due to the absence of mechanical moving parts Three versions are available due to differences in output type: ●LPSD18.1: RS485 Modbus-RTU output and voltage-free contact output (closed = SRD ≥ 120 W/m², open = SRD < 120 W/m²) ●LPSD18.2: RS485 Modbus-RTU output, analog voltage output DC 0–1V (corresponding to direct radiation 0–2000 W/m²) and digital voltage output (output 1V = SRD ≥ 120 W/m², output 0V = SRD < 120 W/m²) ●LPSD18.3: SDI-12 output and voltage-free contact output (closed = SRD ≥ 120 W/m², open = SRD < 120 W/m²)
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basic information
Sensor: Silicon Photodiode x16 Spectral Range: 360–1100nm Direct Radiation (SRD) Measurement Range: 0–2000W/m² Direct Radiation Measurement Accuracy: Over 90% monthly total Sunshine Duration Sensor Measurement Accuracy: Over 90% monthly total Response Time: <1ms Threshold: 120W/m² Sunshine Duration Resolution: 1 second Main Power Supply & Current Consumption: DC7–30V, 5mA (@12V) Heater System Power Supply: DC12–15V Internal Temperature Measurement Range: -40–+80℃ Internal Temperature Measurement Accuracy: ±0.5℃ Operating Temperature: -40–+80℃ Weight: Approximately 0.9kg Protection Rating: IP66 Output: [LPSD18.1] - RS485 Modbus-RTU - Isolated Contact (Closed = SRD ≥ 120W/m², Open = SRD < 120W/m²) [LPSD18.2] - RS485 Modbus-RTU - Analog Output DC0–1V (0–2000W/m²) - Digital Output 0–1V (1V = SRD ≥ 120W/m², 0V = SRD < 120W/m²) [LPSD18.3] - SDI-12 - Isolated Contact (Closed = SRD ≥ 120W/m², Open = SRD < 120W/m²)
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Applications/Examples of results
Agricultural science, crop growth, performance evaluation in solar power generation Automatic opening and closing of blinds and shutters in building automation Various applications that require monitoring the presence or absence of sunlight
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Company information
Sakaki Corporation provides products and services from leading European manufacturers such as "Sensirion (formerly Delta Ohm) (formerly Glaesinger)", "Senseair", "Z-LASER", and "LSI Lastem" as the official importer and distributor in Japan. Additionally, we develop, support, and undertake custom development and mass production of our own brand network IoT products, including routers and gateways that support camera video and solar power cloud services.
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