In the fields of industrial control,environmental monitoring and intelligent equipment,accurate temperature and humidity measurement is very important.In order to meet the market demand for high precision,high stability and ease of use,the digital temperature and humidity sensor GX18B20H introduced by Zhongke Yinhe Core has become an ideal choice to replace the QT18B20H temperature sensor created by Qixin with its excellent performance.Let's introduce the digital temperature and humidity sensor GX18B20H.
 

1.Overview of digital temperature and humidity sensor GX18B20H chip.

GX18B20H is a digital temperature sensor based on single-bus protocol communication,which only needs one signal wire and ground wire to complete data interaction,greatly simplifying the system wiring design.The sensor supports the measurement in a wide temperature range from-55℃to+125℃,and the accuracy can reach 0.1℃in the normal environment(0℃~50℃),which meets the needs of most high-precision temperature measurement scenarios.In addition to the standard independent power supply mode,GX18B20H digital temperature and humidity sensor also supports"parasitic power supply"mode,which supplies power directly through data line without external power line,which is very suitable for applications with limited wiring or high integration.
 

2.Performance of digital temperature and humidity sensor GX18B20H chip.

①Single bus networking capability

Each GX18B20H digital temperature sensor has a global unique 64-bit serial number,which supports mounting multiple sensors on the same bus to realize distributed networking monitoring.Only one master controller can manage all nodes in a wide area,which greatly reduces the complexity and cost of the system.
 

②High resolution and fast response.

The digital temperature and humidity sensor provides 9~12-bit adjustable temperature resolution,and the conversion time in the highest precision mode does not exceed 750ms,which takes into account the requirements of speed and accuracy.
 

③nonvolatile alarm setting

The user can define the upper and lower temperature thresholds,and the configuration information is stored in the non-volatile storage unit,which is not lost when power is off.The digital temperature and humidity sensor also supports the alarm search function,which is convenient for the system to quickly identify abnormal nodes.
 

④Strong anti-interference and multi-package selection

It has the ability of electrostatic protection up to 8000V HBM,and adapts to complex industrial environment.Digital temperature and humidity sensor provides TO-92,MSOP8 and other packaging forms to meet different installation requirements.

3.parameters of digital temperature and humidity sensor GX18B20H

①Working temperature range:-55℃~+125℃

②Maximum accuracy:0.1℃

③Resolution:9~12 bits

④working voltage:2.5V-5.5V

⑤conversion time:750ms

⑥Standby power consumption:0.75μA A.

⑦packaging forms:TO92,TO92S,MSOP8,SOP8.
 

4.Application scenario of digital temperature and humidity sensor GX18B20H

①Industrial system and process control:temperature monitoring of production line and overheating protection of equipment;

②HVAC and environmental control:building automation,temperature and humidity management of computer room;

③Monitoring of grain situation and storage:multi-point temperature and humidity records of grain depot and cold storage;

④Consumer electronics and intelligent hardware:temperature sensing of household appliances and wearable devices;

⑤Meteorological station and agricultural Internet of Things:outdoor environmental data collection and transmission.


Keywords: Digital temperature and humidity sensor