Temperature and humidity sensor DHT21 (AM2301) in case*

Temperature and humidity sensor with a digital, single-wired interface. Measuring range: temperature -40 to 80 °C, humidity 0 to 100 % RH. Powered with voltage in the range of: 3.3 V to 5.5 V.

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In stock, shipping 24 hours!

Price 25,00 zł

Czujnik temperatury i wilgotności powietrza AM2301Parameters:

  • Model: DHT21 / AM2301
  • Supply voltage: 3.3 V to 5.5 V
  • Average current consumption: 1.5 mA
  • Dimensions: 28 x 22 x 5 mm
  • Temperature
    • Measurement range: -40 to +80 °C
    • Resolution: 0.1 °C
    • Accuracy: +/- 0.5 °C
    • Response time: about 2 seconds
  • Humidity:
    • Measuring range: 0 - 100 % RH
    • Resolution: 0.1 % RH*
    • Accuracy ±3% RH* (at 25 °C)
    • Range of measurement: about 2 seconds


*RH - relative humidity is expressed in percents. Is the ratio of actual humidity in the air to its maximum number that air can keep at a given temperature.



Temperature and humidity sensor in closed plastic case. The system can be controlled using a microcontroller or any commissioning set, for example, Arduino. The leads are wires, on which you can install any connectors or solder the wires directly to the base board. Before using, you need to see the documentation.


The product is compatible with Arduino and Raspberry Pi

Library and scheme of connection with Arduino can be found at this address.

User guide for Arduino can be found on our website.

An example of using with the Raspberry Pi is on the blog


Example of connection with microcontroller

The scheme represents the simplest way of connecting the system with any microcontroller using the single-wired interface.


VDD - supply voltage, DATA - data line with lifted resistor 1 k Ohm, GND - chassis ground of system.



  • Interface Digital I / O
  • Sensor - Temperature to 80 °C
  • Sensor - Temperature accuracy +/- 0.5 °C
  • Sensor - Temperature from -40 °C - 120 °C
  • Test: 3


Posting the payment for the order on our account on a business day up to 13:00 means sending the goods on the same day!


The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the website


The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.