|Resolution||9 to 12 bit|
|Temperature range||-55degC to 125degC (-67degF to 257degF)|
|Power indicator||On board|
|board size||21 (mm) x10 (mm)|
LM35 series Temperature Sensor is a precisely integrated circuit whose voltage output is linearly proportional to the centigrade temperature. These sensors have an added advantage over kelvin calibrated sensors and do not require the subtracting of constant voltage from its output to obtain convenient centigrade scaling. Our product need not to be calibrated or trimmed to normal accuracy of ±1/4 °C at room temperature and ±3/4°C over a full -55 to 150°C temperature range.The low output impedance, linear output, and precise inherent calibration of these temperature sensors makes the interfacing to readout or control circuitry easily.These sensors can be used with single, plus or minus power supplies because it draws only 60 mA from its supply and has very low self-heating, less than 0.1°C in still air.
Features of our offered Temperature Sensor are as follows:
AM2302 output calibrated digital signal. It applys exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability. Its sensing elements is connected with 8-bit single-chip computer.
Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite coefficient from memory.
Small size & low consumption & long transmission distance(100m) enable AM2302 to be suited in all kinds of harsh application occasions. Single-row packaged with four pins, making the connection very convenient.
digital signal via 1-wire bus
Polymer humidity capacitor
humidity 0-100%RH; temperature -40~80Celsius
humidity +-2%RH(Max +-5%RH); temperature +-0.5Celsius
Resolution or sensitivity
humidity 0.1%RH; temperature 0.1Celsius
humidity +-1%RH; temperature +-0.2Celsius
This module should be connected as follows:
Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin!
The DHT11 is a low cost version of the DHT22 sensor. The more expensive DHT22 is more precise, more accurate and works in a wider temperature and humidity range.
|Accuracy||At 25 deg C +/- 5% RH|
|Application||HVAC, dehumidifier, testing and inspection equipment, consumer goods, automotive, automatic control,|
|Temperature Range (Degree Celsius)||At 25 deg C +/- 2 deg C|
|Humidity||20%-80%, 5% accuracy;|
|Temperature||0deg to 50 deg C, +/- 2 deg C accuracy|
|Power supply||DC 3.5-5.5V|
|Sampling period||more than 2 seconds|
DHT11 is an inexpensive sensor that provides calibrated digital outputs for ambient temperature and relative humidity. It comes in a single row 4-pin package and operates from 3 to 5.5V power supply. It can measure temperature from 0-50 °C with an accuracy of ±2°C and relative humidity ranging from 20-95% with an accuracy of ±5%. It has got its own proprietary 1-wire protocol, and therefore, the communication between the sensor and a microcontroller is not possible through a direct interface with any of its peripherals. The protocol must be implemented in the firmware of the MCU through bit-banging of an I/O pin.
Low-cost temperature and humidity sensor. Requires a single digital I/O pin to read both temperature and humidity values. Details:
|Accuracy||humidity +/- 2 % RH (Max +/- 5 % RH) ,|
|Sensor Length (millimetre)||small size 14 x 18 x 5.5 mm; big size 22 x 28 x 5 mm|
|Humidity sensor||Polymer humidity capacitor|
|Supply voltage||3.3 to 5.5V DC|
|Operating range||humidity 0 to-100 % RH , temperature - 40 to 80 deg Celsius|
|Output signal||digital signal via 1- wire bus|
|Resolution or sensitivity||humidity 0.1% RH ; temperature 0.1 Celsius|
|Repeatability||humidity +/- 1% RH; temperature +/- 0.2 Celsius|
|Sensing period||Average: 2 s|
|Size||38 x 20 mm|
|Temperature range||-40 to 80 deg C resolution0.1deg C error|
|Humidity range||0-100%RH resolution0.1%RH|
|Sequence of the line||VCC,GND,S|
DHT22 capacitive humidity sensing digital temperature and humidity module is one that contains the compound has been calibrated digital signal output of the temperature and humidity sensors. Application of a dedicated digital modules collection technology and the temperature and humidity sensing technology, to ensure that the product has high reliability and excellent long-term stability.
The sensor includes a capacitive sensor wet components and a high-precision temperature measurement devices, and connected with a high-performance 8-bit microcontroller. The product has excellent quality, fast response, strong anti-jamming capability, and high cost.
Standard single-bus interface, system integration quick and easy. Small size, low power consumption, signal transmission distance up to 20 meters, making it the best choice of all kinds of applications and even the most demanding applications.
DHT22 has higher precision and can replace the expensive imported SHT10 temperature and humidity sensor.
It can measure the environment temperature and humidity to meet the high demand.The product has high reliability and good stability.If it's used and combined with special sensor Arduino expansion board,it will be easily implemented the interactive effect which related to the temperature and humidity perception.
Caution DHT22 digital temperature and humidity sensor is designed for analog sensor interfaces. The analog port will be used as the digital which will not occupy the original digital port of the Arduino.The lines of the sensor which can transform the analog function to digital that can be use on digital port.