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85911854
Adafruit LTR390 UV Light Sensor - Stemma QTQwiic
86% of respondents would recommend this to a friend
Item #:
85911854
SHP 42
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The LTR390 is a low-cost UV sensor that allows you to measure true UV levels with ease, making sun protection effortless!
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What Stands Out
UV Light Measurement
Accurately measures UV light levels, providing essential data for scientific research and health applications, ensuring users have reliable readings for environmental monitoring.
Easy Integration
Features Stemma QT/Qwiic compatibility for seamless connection with various microcontrollers, enabling rapid prototyping and user-friendly integration into existing projects.
High Sensitivity
Boasts a high sensitivity across a broad spectrum, allowing for precise light detection in various conditions, distinguishing it from other sensors that may lack this versatility.
Product Details
| Maximum Supply Voltage | 5 volts |
| Measuring Range | 300 - 350 nm |
| Output Type | Digital |
| Material Type | Copper |
| Item Dimensions | 6.06 x 3.35 x 0.16 inches (15.4 x 8.5 x 0.4 cm) |
| Item Weight | 1 ounces (28.35 grams) |
| Brand Name | Adafruit Industries |
| Model | LTR390 |
| UPC | 687181838938 |
| Number of Items | 1 |
| Manufacturer | Adafruit Industries |
| Unit Count | 1 Count |
| Part Number | ADA-4831 |
| Brand | Adafruit Industries |
| Item dimensions L x W x H | 6.06 x 3.35 x 0.16 inches (15.4 x 8.5 x 0.4 cm) |
| Material | Copper |
Who Should Buy?
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Environmental Scientists
Ideal for researchers monitoring UV radiation levels in various ecosystems for environmental impact studies.
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Students and Hobbyists
Perfect for educational projects, enabling hands-on learning about light sensors and data collection.
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Wearable Tech Developers
Great for integrating into wearables that monitor UV exposure, promoting health and safety in outdoor activities.
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High-Precision Needs
Not suitable for industrial applications requiring exceptionally high precision and calibration standards in light measurements.
Product Description
Adafruit LTR390 UV Light Sensor - Stemma QTQwiic
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the primary function of the Adafruit LTR390 UV Light Sensor?
Answer: The Adafruit LTR390 UV Light Sensor is designed to measure ultraviolet (UV) light levels in various environments. Its primary function is to detect and quantify UV radiation, providing important insights for applications such as climate monitoring, UV-related health assessments, and environmental studies. This sensor effectively helps in understanding UV exposure which is crucial for avoiding overexposure to sunlight. -
Question:
How does the Stemma QT/Qwiic interface work with the LTR390?
Answer: The Stemma QT/Qwiic interface simplifies connections with the LTR390 sensor, allowing easy integration with compatible microcontrollers without needing soldering. This interface utilizes a standardized 4-pin connector, enabling rapid prototyping and versatility in projects. With this setup, users can quickly connect the sensor to platforms like Arduino or Raspberry Pi, facilitating DIY electronics projects. -
Question:
Can the LTR390 be used for outdoor UV monitoring?
Answer: Yes, the LTR390 is suitable for outdoor UV monitoring. Its robust design makes it effective in various weather conditions where UV exposure is a concern. Users can deploy this sensor in garden projects or outdoor activities to track UV levels and assess sunlight exposure for plants or human health, aiding in better decision-making for sun safety. -
Question:
What kind of applications is the LTR390 sensor ideal for?
Answer: The LTR390 UV Light Sensor is ideal for applications ranging from environmental monitoring and solar energy projects to wearable devices that track sun exposure. It can be integrated into data logging systems for scientific research or health-related apps that inform users about their UV exposure. Whether for educational purposes or professional research, this sensor provides versatile applicability. -
Question:
What is the sensitivity range of the LTR390 for UV light detection?
Answer: The LTR390 offers a sensitivity range tailored for UV light detection, responding effectively to varying levels of ultraviolet radiation. This sensor can detect UV light at different wavelengths, ensuring accurate measurements. This capability makes it a powerful tool for users needing precise data for UV monitoring in health and environmental contexts. -
Question:
Is the LTR390 sensor compatible with Raspberry Pi?
Answer: Yes, the Adafruit LTR390 UV Light Sensor is compatible with Raspberry Pi systems. By utilizing the Stemma QT/Qwiic interface, it seamlessly connects with Raspberry Pi boards, allowing users to read UV data effortlessly. This compatibility enables developers and hobbyists to create innovative projects like UV exposure trackers or environmental monitoring systems. -
Question:
How do I read data from the LTR390 sensor?
Answer: Reading data from the LTR390 sensor can be accomplished through an I2C interface. By connecting the sensor to a compatible microcontroller, users can utilize available libraries to retrieve UV light measurements programmatically. This approach allows integration into broader projects, such as logging UV data over time or triggering alerts based on UV thresholds for specific applications. -
Question:
What is the typical operating voltage for the Adafruit LTR390?
Answer: The typical operating voltage for the Adafruit LTR390 sensor is between 3.3V to 5V. This range allows flexibility in various applications, accommodating both microcontrollers and single-board computers. Ensuring the proper voltage level is crucial for the sensor’s optimal performance and reliability in providing accurate UV light data. -
Question:
Does the LTR390 provide digital outputs for direct readings?
Answer: Yes, the LTR390 sensor provides digital outputs, specifically using the I2C protocol for direct readings. This feature allows users to interact with the sensor easily through standard libraries, reading raw measurements without extensive additional circuitry. As a result, it streamlines the data retrieval process for projects focused on UV monitoring. -
Question:
Where can I buy Adafruit LTR390 UV Light Sensor - Stemma QT/Qwiic?
Answer: You can purchase the Adafruit LTR390 UV Light Sensor - Stemma QT/Qwiic from Ubuy in Saint Helena. Ubuy offers a convenient online shopping experience, ensuring you have access to this advanced sensor for your projects.
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Pros
- High sensitivity to UV light
- Compact and easy to integrate
- Low power consumption
- Supports Stemma QT/Qwiic accessory
- Accurate and reliable readings
Platform Trust & Buyer Confidence
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Jazz
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“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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SHP 42
Order now and get it around Sunday, September 13
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Features & Benefits
- Affordable and reliable UV sensor for true UV measurement.
- Ambient light and UVA sensing with peak response between 300-350nm.
- Easy integration with Arduino and Python microcontrollers.
- Simpler I2C interface and eliminates the need for an external ADC.
- Comes on a breakout PCB in Stemma QT form factor for easy testing.
- Compatible with both 5V and 3.3V logic systems.
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