Generic DHT-11 Digital Temperature & Humidity Sensor - 4-Pin Package

Name: Generic DHT-11 Digital Temperature &amp; Humidity Sensor - 4-Pin Package
Brand: Generic
SKU: SENS-3451
Price: 68.00 INR
Availability: OutOfStock

₹68.00 (Inclusive of all taxes)

Out of Stock

The DHT-11 is a basic digital temperature and humidity sensor module featuring a capacitive humidity sensor and a thermistor. It provides calibrated digital output via a single-wire interface, making it compatible with microcontrollers like Arduino, Raspberry Pi, ESP32, and STM32.

Features

Integrated capacitive humidity sensor and thermistor for combined measurement.
Calibrated digital signal output simplifies interface with microcontrollers.
Low power consumption suitable for battery-powered applications.
Standard 4-pin package with single-wire communication protocol.
Provides stable readings for basic environmental monitoring tasks.

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Description

The DHT-11 sensor module combines a capacitive humidity sensing element with an NTC thermistor to measure ambient conditions. It features an onboard 8-bit microcontroller that handles signal conditioning and outputs fully calibrated digital data, eliminating the need for external analog-to-digital conversion. The sensor communicates via a proprietary single-wire protocol, requiring precise timing in the host microcontroller’s code for data retrieval.

Designed for cost-sensitive applications, the DHT-11 offers a practical solution for basic environmental sensing. Its digital output ensures good noise immunity for signal transmission over short distances. A key operational constraint is its sampling rate, which is limited to one reading every 2 seconds to ensure sensor stability and accuracy.

Key Features

Integrated Sensing: Combines a capacitive humidity sensor and a thermistor for simultaneous temperature and humidity measurement.
Calibrated Digital Output: Onboard processing provides fully calibrated digital readings, simplifying system integration.
Single-Wire Interface: Utilizes a simple serial protocol for communication, minimizing required I/O pins on the host controller.
Low Power Consumption: Optimized for energy-efficient operation in portable or remote monitoring nodes.
Stable Performance: Offers consistent, long-term readings suitable for non-critical monitoring applications.
Compact Form Factor: Standard 4-pin single-row package enables easy prototyping and integration.

Applications

Basic indoor climate monitoring for HVAC system feedback.
Environmental data logging in DIY electronics and maker projects.
Plant growth monitoring in small-scale greenhouse or terrarium setups.
Simple weather station nodes for educational purposes.
Low-cost humidity sensing in storage areas or server racks.

Technical Specifications

Parameter	Specification
Model	DHT-11
Humidity Range	20% to 90% RH
Temperature Range	0°C to +50°C
Humidity Accuracy	±5.0% RH
Temperature Accuracy	±2.0°C
Output Interface	Digital (Single-Wire)
Supply Voltage	3.3V to 5.5V (Typical)
Sampling Period	≥ 2 seconds
Package / Pinout	4-Pin Single Row

Frequently Asked Questions

What is the operating voltage range for the DHT-11 sensor?

The DHT-11 typically operates from 3.3V to 5.5V DC. It is commonly used with 5V logic from Arduino boards or 3.3V systems like ESP32, but always check the signal level compatibility for the data pin.

How do I read data from the DHT-11 sensor with an Arduino?

You must use a library designed for the DHT series (e.g., DHT-sensor-library). Connect the data pin to a digital I/O pin, VCC to 5V, and GND to ground. The library handles the precise timing required by the single-wire communication protocol. Remember to include a delay of at least 2 seconds between sensor readings.

What is the maximum sampling rate for the DHT-11?

The DHT-11 has a mandatory sampling period of 2 seconds. Attempting to query the sensor more frequently will not yield new data and may cause communication errors or return stale readings. Always program your microcontroller to wait at least 2 seconds between read requests.