Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	DHT22 / AM2302
Measurement Range (Temperature)	-40°C to +80°C
Measurement Range (Humidity)	0% to 100% RH
Accuracy (Temperature)	±0.5°C
Accuracy (Humidity)	±2% RH
Resolution	0.1°C / 0.1% RH
Sampling Period	2 Seconds
Operating Voltage	3.3V to 6V DC
Output Signal	Single-bus Digital
Package Type	Module with Pull-up Resistor

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Better than the DHT11

Upgraded from the DHT11 and the difference in precision is noticeable immediately. The wider temperature range also makes it suitable for outdoor use with a simple enclosure.

Anonymous

Mar 26, 2026

Rating: 4/5

Good accuracy for the price

I am using this to monitor my greenhouse environment. It handles the humidity well, though it takes a few seconds to update. For the cost, you really cannot beat the performance.

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for Arduino Projects

This sensor works flawlessly with my Arduino Uno. The readings are stable and match my calibrated hygrometer very closely. The module version is great because it includes the pull-up resistor, saving me time on wiring.

Anonymous

Mar 18, 2026

Rating: 5/5

Reliable and Easy to Code

Integrated easily into my ESP32 home automation system. The library support is excellent, and I haven't had any dropped signals since installation three months ago.

Anonymous

Mar 15, 2026

Rating: 5/5

Great for university projects

Bought this for my final year project on environmental monitoring. It provided consistent data throughout the testing phase. Highly recommended for students.

Anonymous

Mar 10, 2026

Rating: 4/5

Solid performer

Works as advertised. Just remember the sampling rate is 2 seconds, so don't expect instant updates if you are polling too fast. Otherwise, a great little sensor.

5 FAQ

Q: Can I use this with a Raspberry Pi?

A: Absolutely. The DHT22 works well with Raspberry Pi GPIO pins. Just ensure you are using a 3.3V logic level, which matches the Pi's output, and install the appropriate Python library.

Q: How often should I calibrate this sensor?

A: The DHT22 is factory calibrated. Under normal operating conditions, it maintains accuracy for years. If used in extreme environments, comparing it against a reference device annually is good practice.

Q: Is this sensor waterproof?

A: The sensor probe itself has some resistance to humidity but is not fully waterproof. For outdoor or wet environments, please house it in a breathable protective enclosure.

Q: Does this module come with a pull-up resistor already installed?

A: Yes, this specific module version includes a 10k pull-up resistor on the data line, so you can connect it directly to your microcontroller without additional components.

Q: What is the maximum cable length recommended for accurate readings?

A: For reliable communication, we recommend keeping the cable length under 20 meters. If you need longer distances, consider using a shielded cable or a signal booster.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

HC-SR501 Human Motion Infrared Sensor Module Compatible with Arduino micro:bit Eco-Friendly

$7.50

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range

$23.65

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

DHT22 Single-Bus Digital Temperature & Humidity Sensor AM2302 Module Electronic Building Blocks

$10.42

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

GY-30 302 Digital Light Intensity Illuminance Sensor BH1750FVI Module Light Sensor Ball

$7.41

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

OPT3001/3002/3004 Ambient Light Sensor Module Measures Visible Light Density Digital Optical Sensor

$8.14

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

MPU-9255 9-Axis Attitude 3-Axis Electronic Compass Accelerometer Gyroscope Magnetic Field Sensor Module

$13.42

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Soil Moisture Sensor Probe Soil Moisture Meter Detection Module Sensor Separate Probe

$2.39