DFRobot
RS485 Ultraviolet (UV) Intensity Measure Sensor (290-390nm, UVA, UVB)
· MPN: SEN0642
An industrial-grade RS485 UV sensor that measures ultraviolet intensity (0–15 mW/cm²) and UV index (0–15) across the 290–390 nm wavelength range, covering bo...
An industrial-grade RS485 UV sensor that measures ultraviolet intensity (0–15 mW/cm²) and UV index (0–15) across the 290–390 nm wavelength range, covering both UVA and UVB bands. It communicates via the Modbus-RTU protocol over RS485, making it easy to integrate with Arduino and other microcontrollers using a TTL-to-RS485 adapter.
Housed in an IP67-rated metal aluminium shell, the sensor is built for long-term outdoor and industrial use. It operates on a wide DC 5–30V power supply and delivers readings with 0.01 mW/cm² resolution and a fast 0.2-second response time.
Key Features
- 290–390 nm Wavelength Range – Covers UVA and UVB bands
- UV Intensity and Index – Measures 0–15 mW/cm² intensity and 0–15 UV index
- RS485 Modbus-RTU – Standard industrial communication protocol
- IP67 Rated – Dust-tight and water-resistant aluminium housing
- Wide Voltage Input – DC 5–30V
- Fast Response – 0.2-second measurement time
Specifications
- Power Supply – DC 5–30V
- Working Current – <10 mA
- Output – RS485 (Modbus-RTU)
- UV Intensity Range – 0–15 mW/cm²
- Resolution – 0.01 mW/cm²
- Accuracy – ±10% FS (@ 365 nm, 60% RH, 25°C)
- UV Index Range – 0–15
- Wavelength Range – 290–390 nm
- Response Time – 0.2 s
- Operating Temperature – -25 to +60°C
- Protection Rating – IP67
- Sensor Cable – 20 cm
- Adapter Cable – 70 cm
Ideal For
- Environmental UV monitoring and climate studies
- Health protection and UV exposure tracking
- Agricultural crop growth monitoring
- Photovoltaic system assessment
- Laboratory UV research
Package Contents
- 1× RS485 UV Sensor
- 1× Adapter Cable
- 1× Screw Package
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- IP67
- An ingress protection rating meaning the enclosure is dust-tight and can survive temporary immersion in water under specified test conditions. This matters when choosing a sensor for outdoor, wet, or wash-down environments.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs, and automation devices. Modbus support matters because it can make the controller easier to integrate with existing industrial equipment.
- ModBus-RTU
- ModBus-RTU is a common industrial protocol for sending sensor readings and control commands over serial links such as RS485. Knowing the sensor uses ModBus-RTU helps you choose software libraries, data loggers, or controllers that can request and interpret its readings.
- RS485
- RS485 is a robust wired serial communication standard often used in factories, farms, and buildings where cables may be long or electrically noisy. It matters because it lets this controller connect to industrial sensors, meters, and control equipment over longer distances than typical hobby serial wiring.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
- UVA
- UVA is the longer-wavelength part of ultraviolet light, closest to visible violet light. Measuring it separately matters when you need to distinguish general UV exposure from the more energetic UVB and UVC bands.
- UVB
- UVB is a middle band of ultraviolet light that is more energetic than UVA and is important in sun exposure and plant-related UV monitoring. A sensor with a separate UVB channel lets you measure this band without it being mixed together with other UV light.
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Supplier page — dfrobot.com
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Related Tutorials
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