Teyleten Robot SHT31 Sensor
4.7Editor score
High precision I2C output
Extensive temperature range
Wide operating voltage support
In this guide
Selecting the right humidity sensor is crucial for any Arduino project that monitors environmental conditions. Whether you are building a weather station or controlling a greenhouse, accuracy and reliability matter. This guide explores the most popular options available to developers and hobbyists today.
We evaluated ten distinct models based on technical specifications, user feedback, and integration ease. Our analysis focuses on measurement ranges, accuracy levels, and communication protocols like I2C or single-wire digital outputs. This ensures you can find a match for your specific voltage and coding requirements.
Each pick highlights key strengths and ideal use cases to streamline your selection process. You will see detailed reviews and a comparison table to make an informed decision. Please note that pricing and availability can fluctuate over time on major retail platforms.
Top 3 Picks for Best Arduino Humidity Sensor
HiLetgo DHT11 Sensor Module
4.5Editor score
Simple single-wire interface
Wide 3.3V to 5V support
Includes pre-calibrated module
AHT30 High Precision Module
5.0Editor score
Cost-effective high accuracy
Fast I2C communication speed
Compact and easy to mount
Top 10 Best Arduino Humidity Sensor in 2026 Compared
The following table provides a side-by-side overview of all ten products to help you compare key specifications quickly. Note the differences in range, accuracy, and communication types to find the best fit.
ProductsSpecificationsEditor scorePrice
Editor's Choice
HiLetgo DHT11 Sensor Module
Range: 20-95% RH
Accuracy: +/- 5% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5V
4.5Editor score
Editor's Choice
2pcs DHT11 Module Kit
Range: 20-95% RH
Accuracy: +/- 5% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5V
4.3Editor score
Best Premium
Teyleten Robot SHT31 Sensor
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: I2C IIC
Voltage: 2.4V to 5.5V
4.7Editor score
HiLetgo DHT22 Module
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5V
4.4Editor score
Teyleten DHT11 5-Pack
Range: 20-95% RH
Accuracy: +/- 5% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5V
4.4Editor score
DHT22 AM2302 Module
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5V
4.6Editor score
Teyleten DHT22 3-Pack
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: Single Bus Digital
Voltage: 3.3V to 5.5V
3.9Editor score
DHT11 Humidity 10-Pack
Range: 20-90% RH
Accuracy: +/- 5% RH
Interface: Single Wire Digital
Voltage: 3.3V to 5.5V
4.6Editor score
4Pcs DHT22 Sensor Module
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: Single Bus Digital
Voltage: 3V to 5.5V
4.0Editor score
AHT30 High Precision Module
Range: 0-100% RH
Accuracy: +/- 2% RH
Interface: I2C IIC
Voltage: 2.0V to 5V
5.0Editor score
1. HiLetgo DHT11 Sensor Module – Best Overall for Beginners
HiLetgo DHT11 Sensor Module
Humidity range 20 to 95 percent
Temperature range 0 to 50 degrees C
Digital single bus communication protocol
Voltage 3.3 to 5 volts DC
The HiLetgo DHT11 module is a classic choice for hobbyists starting with environmental monitoring. It offers a solid balance of cost and functionality, making it ideal for basic indoor projects. With a 4.5 rating, users praise its simplicity and robustness for common tasks.
Pros
- Easy to integrate with Arduino boards
- Low cost for multiple sensor kits
- Onboard components simplify wiring tasks
- Simple documentation for quick setup
- Reliable performance for general monitoring
Cons
- Limited temperature measurement range
- Lower accuracy compared to SHT models
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Its onboard bypass capacitor and pull-up resistor mean you do not need extra circuitry. The single-wire interface connects directly to a digital pin, simplifying code implementation. It supports 3.3V to 5V inputs, fitting most Arduino boards seamlessly.
While the accuracy is adequate for general use, it is not suitable for precision scientific needs. The range is limited to 0-50C which excludes extreme environments. These trade-offs are acceptable for most home automation or educational experiments.
Buy this if you need multiple sensors for prototyping without spending much. It is perfect for weather stations or smart home humidity monitors. This module remains a top choice for its user-friendly design and reliability.
Simple Integration for New Makers
The single-wire protocol reduces complex wiring efforts significantly for new users.
Cost-Effective for Prototyping
Buying five units ensures you have spares for large-scale or bulk projects.
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2. 2pcs DHT11 Module Kit – Ideal for Small Sets
2pcs DHT11 Module Kit
Humidity range 20 to 95 percent
Temperature range 0 to 50 degrees C
Digital output with high reliability
Voltage 3.3 to 5 volts DC
This two-pack kit provides a straightforward solution for users needing just a couple of sensors. It maintains the standard DHT11 performance characteristics, ensuring consistent data output for your projects. The inclusion of wires saves time on initial setup.
Pros
- Compact size for tight spaces
- Includes wires for easy connection
- Compatible with Raspberry Pi and Arduino
- Quick response time for updates
- Stable long term performance
Cons
- Limited to only two units per pack
- Accuracy less precise than high-end units
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The module uses a dedicated digital signal for high reliability. It combines a resistive element and NTC temperature device for balanced readings. You can rely on it for daily indoor monitoring without frequent recalibration.
The main limitation is the small pack size if you need bulk sensors. Also the accuracy is moderate so avoid critical control loops. Still for casual use it offers excellent value and ease of use.
Choose this if you need spare units alongside your main sensor. It is great for testing different locations in a home. This kit supports a wide range of microcontrollers effectively.
Convenient for Raspberry Pi Projects
Works seamlessly with both Arduino and Raspberry Pi GPIO pins.
Reliable Signal Output
Dedicated digital module ensures stable data acquisition over time.
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3. Teyleten Robot SHT31 Sensor – Best Premium Accuracy
Teyleten Robot SHT31 Sensor
Humidity range 0 to 100 percent
Temperature range negative 40 to 125 degrees C
I2C output interface
Voltage 2.4 to 5.5 volts
The SHT31 module stands out for its superior accuracy and wide range. It offers +/- 2 percent humidity and 0.3 degree Celsius temperature precision. This makes it ideal for applications where data reliability is paramount.
Pros
- High precision accuracy levels
- Wide operating temperature range
- I2C communication for multiple sensors
- Wide voltage input flexibility
- Excellent long term stability
Cons
- Higher price point than DHT models
- Requires I2C wiring knowledge
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Its I2C interface allows you to connect multiple sensors on the same bus easily. The wide voltage range from 2.4V to 5.5V provides flexibility with different boards. The temperature range is extensive, covering most indoor and outdoor conditions.
The trade-off is the cost and slightly more complex wiring compared to single-wire options. If budget is tight you might find it expensive. However for critical projects the data quality justifies the investment.
Buy this for professional prototypes or high precision monitoring tasks. It is perfect for industrial environments or advanced weather stations. This sensor delivers performance that exceeds standard hobbyist modules.
Superior Precision for Data Logging
Accuracy ensures your recorded data is trustworthy over long periods.
Versatile Voltage Compatibility
Supports a wide range of power sources for diverse projects.
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4. HiLetgo DHT22 Module – Great Mid-Range Option
HiLetgo DHT22 Module
Humidity range 0 to 100 percent
Temperature range negative 40 to 80 degrees C
Single bus digital signal output
Accuracy 0.5 degrees Celsius
The DHT22 is a step up from the DHT11 with better accuracy and range. It measures humidity from 0 to 100 percent which covers all standard scenarios. The temperature range is also broader, handling colder climates well.
Pros
- Better accuracy than DHT11
- Wider temperature range support
- Full humidity range coverage
- Easy to install with screws
- Compatible with many libraries
Cons
- Slightly higher cost than DHT11
- Still slower than I2C sensors
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It uses the same single-bus interface but offers higher precision. The sensor includes fixing screw holes for secure mounting in enclosures. This physical feature is handy for permanent installations like greenhouses.
The main downside is it is still a digital bus sensor which can be slower than I2C. But for most applications the speed is sufficient. The price difference is minimal compared to the performance gain.
Choose this if you need more precision without moving to I2C. It is great for automated climate control systems. This module balances cost and performance effectively for most users.
Secure Mounting Options
Screw holes allow you to fix the sensor firmly in place.
Expanded Measurement Ranges
Better coverage for extreme temperature and humidity environments.
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5. Teyleten DHT11 5-Pack – Best Value Bulk Set
Teyleten DHT11 5-Pack
Humidity range 20 to 95 percent
Temperature range 0 to 50 degrees C
Digital output type
Voltage 3.3 to 5 volts
This five-pack from Teyleten offers excellent value for anyone needing multiple sensors. It is perfect for projects requiring distributed monitoring across different rooms. The units are lightweight, making them easy to integrate into custom setups.
Pros
- Excellent value for multiple units
- Lightweight design for easy mounting
- Standard DHT11 performance
- Compatible with Arduino IDE
- Simple connection process
Cons
- Limited measurement range
- Basic accuracy for general use
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It uses the familiar DHT11 specification which is well supported by libraries. The 3.3V to 5V input makes it versatile for different board types. You get consistent digital output for reliable reading without complex processing.
The limitations are the standard DHT11 range and accuracy. If you need high precision this might not be enough. But for general monitoring it is a cost-effective solution with plenty of units.
Buy this for classrooms or group projects where many units are needed. It is also great for testing different environmental points easily. This bulk kit saves money compared to buying individually.
Lightweight for Custom Enclosures
Low weight ensures the sensor does not add bulk to small devices.
Distributed Monitoring Capability
Five units allow you to track humidity in multiple zones at once.
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6. DHT22 AM2302 Module – Reliable with Included Cables
DHT22 AM2302 Module
Humidity range 0 to 100 percent
Temperature range negative 40 to 80 degrees C
215mm connecting wire included
Voltage 3.3 to 5 volts DC
This module includes 215mm connecting wires, which is a significant convenience. It allows you to place the sensor away from the controller easily. The AM2302 chip ensures stable performance and fast response for updates.
Pros
- Includes long connecting cables
- High precision +/- 2% RH
- Quick response times
- Compact size design
- Great for home automation
Cons
- Only two units per pack
- Digital bus can be slow
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With full humidity range and high accuracy, it covers most practical needs. The compact size fits well in tight spaces or small boxes. It is designed for automatic control and regulators.
The main limitation is the limited count per pack. Also the single bus wire limits the number of devices on one line. Still for dedicated use the inclusion of cables is a major plus.
Choose this for home appliances where placement is key. It simplifies wiring by providing ready-to-use cables. This pack is perfect for specific targeted monitoring projects.
Convenient Connection Cables
Included wires save you from sourcing your own extension wires.
Stable Performance for Control
Quick response ensures control systems react promptly to changes.
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7. Teyleten DHT22 3-Pack – Balanced Three Unit Kit
Teyleten DHT22 3-Pack
Humidity range 0 to 100 percent
Temperature range negative 40 to 80 degrees C
Serial data bidirectional port
Voltage 3.3 to 5.5 volts
The three-pack provides a middle ground for those needing more than two but fewer than five. It offers the same robust DHT22 performance with a wider voltage input. This is useful if you use 5.5V systems.
Pros
- Three units for moderate scale projects
- Wide temperature range capability
- Full humidity range support
- Wide voltage input flexibility
- Direct replacement for older models
Cons
- Lower rating than other models
- Single wire limits scaling
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The bidirectional serial data allows for precise reading. It is a direct replacement for older sensors so compatibility is high. You get full coverage for temperature and humidity monitoring needs.
The lower rating suggests some variability in quality control. Check units carefully upon arrival to ensure all work well. However the specs are solid for standard indoor or outdoor use.
Buy this if you need three sensors for a medium project. It is ideal for small farms or distributed monitoring. The extra units provide good flexibility for your setup.
Flexible Voltage Input
Supports voltage up to 5.5V for varied power supplies.
Direct Replacement Capability
Fits into projects designed for older SHT models easily.
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8. DHT11 Humidity 10-Pack – Ultimate Bulk Solution
DHT11 Humidity 10-Pack
Humidity range 20 to 90 percent
Temperature range 0 to 50 degrees C
Onboard bypass capacitor
Voltage 3.3 to 5.5 volts
This pack gives you ten fully functional sensor modules ready to install. It is the best option for large scale automation or classroom use. The kit includes cables and documentation to support your needs fully.
Pros
- Ten units for large scale use
- User-friendly integration kit
- Includes cables for all units
- Comprehensive documentation included
- Excellent after-sales support
Cons
- Basic DHT11 performance specs
- High volume may not suit all
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Each module is calibrated for stable long-term performance. You get high reliability with minimal external components needed. The 3.3V to 5.5V input ensures compatibility with most boards.
With ten units, you have plenty of spares for future projects. The documentation helps you get started quickly without searching online. This is a complete solution for bulk needs.
Choose this for workshops or large smart home projects. It saves time and money compared to buying individual units. This kit ensures you have enough sensors for any scale.
Complete Bulk Package
Everything you need for ten sensors is included in the box.
Support and Documentation
Comprehensive guides help you troubleshoot or install with ease.
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9. 4Pcs DHT22 Sensor Module – High Volume Quality Set
4Pcs DHT22 Sensor Module
Humidity range 0 to 100 percent
Temperature range negative 40 to 80 degrees C
Top-of-the-line electronics components
Voltage 3 to 5.5 volts DC
This kit uses top-of-the-line electronics for consistent and durable performance. It offers precise readings across the full humidity range with good temperature coverage. The design is compact and lightweight for easy mounting.
Pros
- High quality electronic components
- Precise environmental readings
- Strong anti-interference capabilities
- Long-term stability ensured
- Lightweight compact design
Cons
- Some units may have variability
- Wiring could be tricky for some
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The high-performance microcontroller ensures quick responses to changes. Strong anti-interference capabilities protect your data from noise. This makes it suitable for environments with electrical interference.
Some users note minor variations between units in the batch. However the overall performance is reliable for monitoring and regulation. It is a solid choice for bulk deployments.
Buy this for dehumidifiers or medical equipment prototypes. The quality components support critical environmental control needs. This pack provides four units for substantial project requirements.
Anti-Interference Design
Built-in protection ensures stable output in noisy environments.
High-Quality Components
Top electronics ensure the sensor lasts longer under stress.
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10. AHT30 High Precision Module – Best Budget Accuracy
AHT30 High Precision Module
Humidity range 0 to 100 percent
Temperature range negative 40 to 85 degrees C
Resolution 0.024% RH
Voltage 2.0 to 5.5 volts
The AHT30 is an upgraded version offering high precision and I2C speed. It has a resolution of 0.024% RH which is very detailed. The 4-pin test lines make connection quick and convenient.
Pros
- High resolution measurements
- I2C communication for scaling
- Low power consumption
- Upgraded performance over older models
- Includes 4-pin test lines
Cons
- Requires I2C wiring knowledge
- Only two units per pack
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It supports simultaneous access to multiple devices on the bus. This allows for complex systems without sacrificing speed. The low power consumption is ideal for battery-operated setups.
The main trade-off is needing to wire I2C which requires two extra pins. But the resolution and speed make it worth the effort for advanced projects. The units are stable and fast.
Choose this for advanced weather stations or precise monitoring. It is perfect for scientific experiments or high-end automation. This module delivers premium features at an affordable price.
Superior Resolution
0.024% RH resolution captures minute changes accurately.
I2C Multi-Device Support
Connect multiple sensors on the same bus efficiently.
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Buying Guide – How to Choose the Best Arduino Humidity Sensor
Selecting the right sensor requires balancing accuracy, range, and integration ease for your project. This section covers the key factors to consider.
Measurement Range
The measurement range defines the limits of humidity and temperature the sensor can detect. For general indoor use, a 20 to 95 percent humidity range is sufficient. However, if you are working in a greenhouse or basement, you may need 0 to 100 percent coverage.
Always check the temperature range as well. Standard sensors work between 0 and 50 degrees Celsius, while premium models handle -40 to 125 degrees.
Accuracy and Precision
Accuracy indicates how close the reading is to the true value. DHT models typically offer +/- 5 percent humidity accuracy, whereas SHT or AHT models offer +/- 2 percent. Precision refers to resolution, such as the 0.024 percent RH on the AHT30.
For precise climate control or scientific experiments, higher accuracy is essential. For casual monitoring, standard accuracy is often acceptable.
Communication Protocol
The communication protocol determines how the sensor talks to your microcontroller. Single-wire digital buses are simple but slow. I2C allows multiple sensors on two wires but requires more technical knowledge.
Choose single-wire for beginners and I2C if you need speed or multiple units. Ensure your Arduino board supports the required protocol.
Operating Voltage
The voltage range must match your Arduino or power supply. Most modules accept 3.3 to 5 volts, but some support wider ranges like 2.4 to 5.5 volts. Using the wrong voltage can damage the sensor.
Check your board's logic levels. If using a 3.3V board, ensure the sensor is compatible to avoid signal issues.
Pack Size and Bulk Value
Some kits come in packs of two, three, five, or ten. Buying in bulk saves money if you need multiple units for testing or large projects. Ensure the price per unit is lower than single buys.
If you only need one sensor, a two-pack is still great as a spare. Bulk sets are best for workshops or distributed monitoring.
Integration Features
Integration features include onboard components, screws for mounting, and included cables. Modules with pull-up resistors simplify wiring. Long cables allow flexible placement away from the main board.
Look for boards with mounting holes if you plan to enclose the sensor. Accessories save you time on assembly.
Stability and Response Time
Long-term stability ensures the sensor does not drift over months of use. Quick response times allow the sensor to adapt rapidly to changes. These are vital for control systems like dehumidifiers.
Sensors with digital stability ratings are better for long deployments. Check reviews for feedback on reliability in real-world conditions.
Price and Value
Prices vary by accuracy and features. Budget options like DHT11 are very cheap, while premium SHT models cost more. Evaluate the cost against the precision required for your task.
Do not overspend if basic data is enough. However, investing in a high-quality sensor reduces the risk of faulty data in the future.
How to Use and Care for Your Arduino Humidity Sensor
Begin by connecting the sensor to your Arduino. Ensure power is off before wiring to prevent shorts. Use the provided cables or wire directly to the digital or I2C pins as per your module type.
Install the necessary library in your Arduino IDE. Upload a test script to verify readings. If the data is stable, proceed to write your specific monitoring code.
Place the sensor in an open area to ensure proper airflow. Avoid placing it directly near heating or cooling sources. Protect the module from water droplets to prevent damage to the electronics.
Frequently Asked Questions
Which humidity sensor is easiest to use with Arduino?
The DHT11 and DHT22 modules are the easiest for beginners because they use a simple single-wire interface. There are many free libraries available in the Arduino library manager that make programming straightforward. You can connect them directly to a digital pin and start reading data in minutes without complex wiring.
Why is my sensor showing random values?
Random values usually indicate a wiring issue or insufficient power. Ensure your connections are secure and the sensor is receiving steady voltage. If using a breadboard, try adding a 10uF capacitor between power and ground to filter noise. Check if your code reads the sensor too frequently.
Can I use these sensors outdoors?
Yes, but you must protect them from rain and dust. Most modules are not waterproof, so place them inside a 3D printed or plastic enclosure. Ensure the enclosure allows air to flow through so the sensor can still detect humidity accurately.
What is the difference between DHT11 and DHT22?
The DHT22 is more accurate and has a wider temperature range than the DHT11. It supports -40 to 80 degrees Celsius compared to 0 to 50 degrees. The DHT22 also measures the full 0 to 100 percent humidity range, while DHT11 is limited to 20 to 90 percent.
Do I need to use a resistor with these sensors?
Most modern modules come with an internal pull-up resistor, so you do not need to add an external one. If you are using bare sensor pins instead of a breakout board, you will need a 10k ohm pull-up resistor between the data pin and power.
How often should I calibrate my sensor?
Most of these modules do not require calibration as they are pre-calibrated from the factory. However, if you notice consistent deviations, you might need to apply a software offset. Generally, if the sensor is stable, you do not need to calibrate it regularly.
Final Thoughts on Choosing the Best Arduino Humidity Sensor
You now have a comprehensive overview of the top 10 Arduino humidity sensors available. From the budget-friendly DHT11 to the high-precision SHT31, there is an option for every project need.
Prioritize accuracy and range if your project involves critical control. Otherwise, the standard DHT series provides excellent value and simplicity for hobbyists and learning.
Remember to check current prices and availability as they change over time. Select the model that best fits your budget and technical requirements for a successful build.