GYML8511 Analog Output Ultra-Violet Light Sensor Module

GYML8511 Analog Output Ultra-Violet Light Sensor Module is a highly precise, easy-to-use ultraviolet light sensor that detects UV intensity by converting light energy into a linear analog voltage. This module utilizes the ML8511 silicon-based sensor chip, which specifically responds to UV-A and UV-B radiation within the 280-390nm wavelength range. Consequently, it enables microcontrollers like Arduino, ESP32, or STM32 to monitor environmental conditions or UV exposure levels with minimal code complexity. Furthermore, the sensor includes an internal amplifier and a power-down mode to conserve energy in battery-operated systems. Therefore, you can effectively integrate this module into wearable devices or weather stations to provide real-time UV index tracking and safety alerts.

Key Features:

• Linear Analog Output: The module outputs a voltage that increases linearly with the detected UV intensity, making data processing straightforward for any microcontroller with an ADC.
• Broad Spectral Response: It accurately detects UV light in the 280nm to 390nm range, covering most of the solar UV-A and UV-B spectrum.
• Integrated Power Management: The chip features a built-in power-down pin (EN) that reduces standby current to approximately 0.1 μA, which is ideal for low-power IoT applications.
• Silicon-Based Stability: Unlike many older UV sensors, this silicon-based technology offers excellent long-term stability and resistance to solarization.
• Internal Amplification: The on-chip amplifier eliminates the need for external signal conditioning, reducing the overall PCB footprint.

Technical Specifications:

• Operating Voltage: 2.7 V to 3.6 V (Typically 3.3 V)
• Detection Wavelength: 280 nm to 390 nm
• Output Voltage Range: ≈ 1.0 V to 2.8 V (Corresponding to 0 to 15 mW/cm²)
• Operating Current: 300 μA (Typical)
• Standby Current: 0.1 μA (Typical in power-down mode)
• Operating Temperature Range: −20°C to +70°C

Mechanical Specifications:

• Sensor Core: ML8511 UV Photodiode IC
• Mounting Hole: 3.0 mm diameter for secure attachment
• PCB Material: Standard FR-4 Glass Epoxy
• Connector Type: 4-pin male header (2.54 mm pitch)

Dimensions:

• Board Length: ≈ 13.0 mm
• Board Width: ≈ 11.0 mm
• Overall Height: ≈ 2.5 mm (excluding pins)
• Weight: ≈ 1.5 g (Ultra-light for wearables)

Pinout and Wiring:

• VIN: Connect to 3.3 V power supply (Do not exceed 3.6 V).
• 3.3V: This pin is often internally tied to VIN on many modules for convenience.
• GND: Connect to the common system ground (0 V).
• OUT: Analog output pin. Connect to the ADC input of your microcontroller.
• EN: Enable pin. Connect to 3.3 V for normal operation or drive low to enter power-down mode.

Datasheet Reference:

• Download LAPIS Semiconductor ML8511 UV Sensor Datasheet

Commonly Used in:

• Arduino Projects: Educators and hobbyists frequently use this module for building DIY UV meters and educational kits.
• Environmental Monitoring: This sensor provides the base data for solar intensity logging in remote weather stations.
• Wearable Health Tech: Engineers integrate the GYML8511 into smartwatches to monitor sun exposure and alert users of high UV levels.

Applications:

• UV Index Measurement: Calculating the standard UV index for public health apps and safety indicators.
• Flame Detection: Detecting ultraviolet emissions from flames in specialized industrial monitoring systems.
• Horticultural Lighting: Measuring UV levels in greenhouse environments to optimize plant growth and health.
• Sunburn Prevention: However, users should always calibrate the sensor against a known standard for safety-critical tanning applications.

Equivalent Models:

• VEML6070 (Vishay): An I²C based digital UV sensor that offers high sensitivity but requires a digital interface instead of analog.
• GUVA-S12SD: A common analog UV sensor that uses a Gallium Nitride based photodiode for UV-A detection.
• SI1145 (Silicon Labs): A digital sensor that provides IR, Visible light, and UV index estimation via an I²C bus.

Package Includes:

• 1 x GYML8511 Analog Output Ultra-Violet Light Sensor Module
• 1 x 4-Pin Straight Header (Unsoldered or Soldered depending on stock)