Description: _x000D_ Temperature and humidity combined sensor AM2320 digital temperature and humidity sensor is a digital signal output has been calibrated. Using special temperature and humidity acquisition technology, ensure that the product has a very high reliability and excellent long-term stability. Sensor consists of a capacitive moisture element and an integrated high-precision temperature measurement devices, and connected with a high-performance microprocessor. The product has excellent quality, super fast response, strong anti-interference ability. _x000D_ _x000D_ _x000D_ Features: _x000D_ The voltage conversion sensor module is DD4012SA, a high-efficiency and low-heat voltage converter. _x000D_ By modifying the RS485 address, up to 247 module s can be connected (More than 16 devices, it is recommended to use RS485 repeater). _x000D_ Temperature and humidity sensor is AM2320. _x000D_ RTU protocol, 03 Read, 06 Write. _x000D_ Widely used for dehumidifiers, testing and inspection equipment, automotive, automation, gas stations, home appliances, humidity control, medical, and other relevant humidity measurement and control. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Working Voltage: DC 5-40V(6.5-28V recommended) _x000D_ Working Current: Digital tube turn off is 5MA(12V), Digital tube turn on is 18MA(12V) _x000D_ Serial Baud Rate: 9600(default), N, 8, 1 _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ How to use: _x000D_ 1, Display "Eror" after power-on. _x000D_ If "Eror" is displayed for a long time, it indicates that the sensor is not connected or is damaged. _x000D_ 2, After 5 seconds, display the temperature or humidity. _x000D_ 3, Trigger "KEY" button to switch the display temperature and humidity.(This parameter is powered down memory). _x000D_ 4, Press and hold the "KEY" button for 3 seconds to turn off or turn on the display.(This parameter is also powered down memory). _x000D_ Note: If the digital tube is turn off after power-on, press and hold the "KEY" button until the digital tube is turn on. _x000D_ _x000D_ _x000D_ Wiring Diagram: _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Note: _x000D_ With the built-in sensor version (R444A01_A), turn on the display for a long time will let the temperature rise 1-2 degrees Celsius. It is recommended to turn off the digital tube, or use a version with an external sensor (R444A01_B) _x000D_ Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering._x000D_ _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 x Module _x000D_ 1 x External Sensor