Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	DHT11
Output Signal	Digital Single-Bus
Operating Voltage	3.0V - 5.5V DC
Temperature Range	0°C to 50°C
Humidity Range	20% to 90% RH
Temperature Accuracy	±2°C
Humidity Accuracy	±5% RH
Sampling Rate	1 Hz (once per second)
Pin Count	4 Pins
Application	Arduino, Raspberry Pi, DIY Electronics

6 reviews

Anonymous

Mar 18, 2026

Rating: 4/5

Great for plant monitoring

I use this to monitor humidity levels for my indoor plants. It responds quickly to changes when I mist the plants. Just remember it has a 2-second sampling delay between reads.

Anonymous

Mar 18, 2026

Rating: 3/5

Decent but limited range

Works well within its specified range. However, if you need to measure outside in winter or very dry conditions, you might hit the limits of this specific model. Consider the DHT22 for wider ranges.

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect for beginner projects

This DHT11 sensor works flawlessly with my Arduino Uno. The library integration was smooth, and the readings are consistent enough for my home weather station project. Great value for the price.

Anonymous

Mar 16, 2026

Rating: 5/5

Reliable and cheap

Bought a pack of five for various IoT prototypes. All of them worked out of the box. The single-bus interface saves GPIO pins which is a huge plus when working with smaller microcontrollers.

Anonymous

Mar 13, 2026

Rating: 5/5

Essential for electronics class

Required this for my university embedded systems course. The documentation online is extensive, making debugging very easy. Highly recommend for students learning about sensors.

Anonymous

Mar 13, 2026

Rating: 4/5

Good basic sensor

Does exactly what it says on the tin. It's not high-precision industrial gear, but for monitoring room temperature and humidity in a terrarium, it is perfectly adequate. Easy to wire up.

5 FAQ

Q: Can this sensor be used outdoors?

A: While it can function outdoors, the DHT11 is not waterproof or weatherproof. You must house it in a protective enclosure that allows air circulation but shields it from rain and direct sunlight to ensure accurate readings and longevity.

Q: How often can I read data from this sensor?

A: The DHT11 has a sampling rate of 1Hz, meaning you can request new data once every second. Reading faster than this may result in returning the last cached value rather than a new measurement.

Q: Is this sensor compatible with Raspberry Pi?

A: Yes, the DHT11 is fully compatible with Raspberry Pi models. You will need to connect the data pin to a GPIO pin and use a Python library like Adafruit_DHT or CircuitPython to read the values.

Q: Do I need an external resistor for this module?

A: If you are buying the module version (with the PCB board), it usually includes the necessary pull-up resistor onboard. If you are using the bare component, you will need to add a 10k ohm pull-up resistor between the data and VCC pins.

Q: What is the difference between DHT11 and DHT22?

A: The DHT22 offers higher accuracy and a wider operating range for both temperature and humidity compared to the DHT11. The DHT11 is more suitable for basic indoor applications, while DHT22 is better for precise or outdoor use.

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