Data Logger Temperature and Humidity Sensor Module Using DHT11

 

DHT11 is a sensor module temperature and relative humidity in a single package. This module requires low power consumption making it suitable to be used for application data logger with battery power supply. This module has guaranteed stability in the long term and the outputs are calibrated, making it suitable to be used as sensors for temperature and humidity data logger air.

DHT11 can measure temperatures between 00-50 degrees Celsius and humidity between 20-90% respectively with a resolution of 0.1 degrees Celsius and 1% RH (Relative Humidity). Accuracy for temperature and humidity measurements are (+/-) (+/-) 2 degrees Celsius and 4% RH.

DHT11 sensor module output has been calibrated in the calibration tube accurately, and the calibration coefficients stored in OTP memory. DHT11 using the good moisture sensor technology and data acquisition techniques used exclusively by utilizing 8-bit microcontroller to generate data in a single-bus format.

 

With the relatively small size, low power consumption, and can transmit data as far as 20m, then DHT11 very suitable for use in data acquisition system temperature and air humidity in the weather-station applications, green-house, warehouse, data center environment monitoring, and others.

The picture is a data acquisition module temperature and humidity using DHT11 sensor module with RS232 serial data output.

Module using ATmega8 AVR microcontroller with firmware created using the open-source Arduino. Modules are available in modular form that comes with source-code and Arduino source-code examples of applications of temperature and humidity data readings using VB.NET 2005 Express Edition.

                                                           Here is a display program.

One more thing, DHT11 an economical solution for measurements of temperature and humidity. So if you need a module temperature and humidity sensors for applications such as monitoring temperature and humidity server room or warehouse, temperature and humidity control green-house, and the weather station, then DHT11 is perfect for those needs.