How to Choose Pressure Sensor or manometer?

Pressure sensors and pressure gauges are both devices used for measuring pressure, but they differ significantly in terms of function, output method, and application scenarios:                
                
1.Core functions are different:                
·Manometer: Its main function is to visually display the pressure value. It enables users to directly read the pressure level through indicators, digital screens, etc., and it falls under the category of "display device".                
·Pressure Sensor: The core function is to convert pressure signals into electrical signals (such as voltage, current). These signals themselves do not directly display numerical values; they need to be processed and displayed in conjunction with devices such as meters, PLCs, and computers, and thus fall under the category of "signal conversion equipment". 

2.Different output methods:        
· Manometer: The output of the pressure gauge is the visualized pressure value (such as MPa, KPa), which is directly readable by the user.        
·The output of the pressure sensor is an electrical signal (such as 4-20mA current or 0-5V voltage), which is mainly used for signal transmission in automated control systems.

3.Precision and sensitivity：            
· Manometer: the accuracy is relatively low (typically 1% to 2.5% of the full scale), and it is limited by its mechanical structure, resulting in a relatively slow response.             
·Pressure Sensor: usually has higher accuracy (up to 0.1% FS or higher), fast response speed, and is suitable for dynamic pressure measurement.            
            
4.Application Different:            
·Manometer:It is mostly used in scenarios where direct manual monitoring is required, such as pressure display on pipelines and gas cylinders, and manual reading in laboratories.            
·Pressure Sensor:It is mainly used in automatic control or data acquisition systems, such as pressure closed-loop control in industrial production lines, water pressure monitoring in smart homes, and oil pressure sensors in automotive engines, etc. These systems need to work in conjunction with other devices.            
            
5.Other Differences

6.how to choose?  
·Select Pressure Sensors: those that allow remote control, offer high precision, or support automated control are required.    
· Select Manometer: for local direct reading, limited budget, or harsh environments (such as high temperatures, strong corrosivity)     
In some scenarios, the two can be used together (for example, using a pressure gauge as a backup at the site, and the sensor for remote transmission).