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The DHT-11 Digital Temperature And Humidity Sensor is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed).

Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so in your code please use sensor reading interval at 2 seconds or more. Compared to the DHT22, this sensor is less precise, less accurate and works in a smaller range of temperature/humidity.

But despite its disadvantages over DHT22, it is smaller and less expensive sensor for temperature and humidity measurement.

Note: This package does not include Arduino board, you have to buy it separately.

Features : 

• Low power consumption.
• Relative humidity and temperature measurement
• All calibration, digital output
• Excellent long-term stability
• No additional components
• Long distance signal transmission
• Ultra-low power
• 4-pin package
• Completely interchangeable
• Humidity measuring range: 20%~90%RH(0~50 degree (temperature compensation)
• Temperature measuring range: 0~ 50degree
• Humidity measurement accuracy: ±5.0%RH
• Temperature measurement accuracy: ±2.0degree

• 1 x DHT-11 Digital Temperature And Humidity Sensor

• On-board ADXL345, it's a low cost cap-based accelerometer sensor
• Support 5V/3.3V voltage input, onboard RT9161, better performance than 1117, faster load the appropriate speed, it is ideal for high noise power supply environment
• Common Pins were lead out, Pin distance is standard 100mil (2.54mm), compatible for your new system

AM1011A analog temperature and humidity module is a have already calibrated analog signal output of the temperature and humidity sensor, the sensor signals using analog voltage loss, out of the way; This module has high precision, high reliability, good consistency, and with temperature compensation, ensure the long-term stability is good, easy to use and high performance, especially suitable for the quality, cost, more demanding enterprise to use.

Features : 

• Excellent long-term stability
• Low power consumption, small size, high-cost performance
• Complete interchange
• Analogue voltage output
• Excellent long-term stability

• 1 x Temperature and Humidity Sensor Model AM1011A

The RH/T sensor module AM2301B is equipped with a newly designed ASIC dedicated chip, an improved MEMS semiconductor capacitive humidity sensor and a standard on-chip temperature sensor, its performance has been greatly improved or even exceeded the reliability level of the previous generation of sensors, the new generation of temperature and humidity sensor, improved to make its performance in harsh environments more stable. Every sensor has been rigorously calibrated and tested. The structural design of the product shape has a certain protective effect on the sensor, and it is equipped with fixed mounting holes to make the product adapt to more installation scenarios.

Features : 

• Fully calibrated
• Digital output, I²C interface
• Excellent long-term stability
• Quick response
• Strong anti-interference ability
• A variety of accessories to choose from
• Tailor-made application solutions

• 1 x Temperature and Humidity Sensor Model AM2301B

This is a simple to use Arduino motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the ‘alarm’ pin will go low. This sensor checks for infrared heat in its detecting angle. The human body, pets, and several other things emit energy that the sensor is looking for, it compares with the snapshot, and if there is a recent change it triggers.

Get on with your Home alarm security audit gear and experiment with this sensor to get a better understanding of its efficiency and working method. Infrared motion detectors are common all around the world for many different appliances. It’s great for an Arduino or home automation project that requires automated motion feedback. Commonly found on automatic trigger light systems, where lights are ON when someone is in range and OFF when no one is around. Save power or trigger other actuators like a door opener or pet feeder.

• Low power consumption
• Compact size
• Cost-effective
• Adjustable sensitivity

• 1 x Digital infrared Motion Sensor
• 1 x Digital Sensor Cable