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Temperature-Humidity Sensor-AM2311A (Upgraded Version of DHT22)

AM2311A is an upgraded version of AM2311, AM2311 is a capacitor chip AM2311A inside is a car-level integrated chip. This is a stable temperature and humidity sensor module.

Out of stock
  • 10+: $3.70



AM2311A (an upgraded version of DHT22)  digital temperature and humidity sensor provides calibrated digital signal output. AM2311A digital temperature and humidity sensor use special temperature and humidity acquisition technology to ensure that the product has high reliability and excellent long-term stability.

The AM2311A digital temperature and humidity sensor is composed of capacitive humidity elements and integrated high-precision temperature measurement equipment and is connected to a high-performance microprocessor.


  • Includes a capacitive humidity sensor and a high precision temperature sensor.
  • Full calibration
  • Digital output, unibus interface
  • Excellent long-term stability
  • Quick response and strong anti-jamming capability


If the sensor is surrounded by volatile solvents, irritating tapes, adhesives, and packaging materials, the reading may be higher. For more information, please refer to the relevant documents.

The AM2311A includes a capacitive humidity sensor and a high precision temperature sensor. The range of humidity sensor is 0 to 99.9 %RH with ±3% accuracy while the temperature sensor ranges from -40 to 80℃ with ±0.5℃ accuracy. 

Calibration coefficients are stored in the form of a program in the single-chip computer. These calibration coefficients are called in the process of processing the detection signal inside the sensor. A standard single bus interface makes system integration easy and fast. The standard single bus interface makes system integration easy and fast. Ultra-small size, very low power consumption, Signal transmission distance can reach more than 20 meters. Products are cited as 3Wire (single bus interface) the connection is convenient. You can download the Datasheet


Typical accuracy (% RH) ± 3
Operating range (% RH) 0 to 99.9
Humi response time(s) 5
Typical accuracy (°C) ± 0.5 
Operating range (°C) -40~80 
Temp response time(s) 5
Interface 1-Wire
Supply voltage(V) 3.3~5.5

Application Scope

An HVAC system, dehumidifier, test, and inspection equipment, consumer goods, automobiles, automatic control, data recorder, weather, household appliances, humidity regulation, medical and other related temperature and humidity detection and control.

Electric specification

Parameter Condition  Min  Typical  Max  Unit
Supply Voltage   3.3 5 5.5 V
Power-consumption Sleep 2 15   μA
measuring   1200   μA
Average   600   μA
Low level output voltage I OL 0   300 mV
High level output voltage Rp <25 KΩ 90%   100% VDD
Low level input voltage Decline 0   30% VDD
High level input voltage Rise 70%   100% VDD
RPU VDD = 5V            VIN = VSS 1 5.1 100
Output current Open   8   mA
(turn off)
10 20   μA
Sampling period   2     S


Sensor performance

Part List

1 x AM2311A


HSCODE 9025800000
USHSCODE 9026104000
EUHSCODE 9013101000
RoHS 1





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