Core Guide for Model, Structure and Material of Photoelectric Contact Pressure Gauge

Photoelectric Contact Pressure Gauge

The photoelectric contact pressure gauge is an intelligent instrument that integrates pressure measurement, display and automatic control. It detects the pressure value through non-contact photoelectric sensing technology and can output a switch signal when the pressure reaches the preset upper or lower limit, thereby controlling the start or stop of external equipment (such as water pumps, motors, alarms, etc.).  

You can consider it as a very "smart" and "secure" pressure switch, equipped with an intuitive pointer dial.                        
In industrial automation control, the accuracy of pressure monitoring and alarm directly affects production safety and efficiency. The photoelectric contact pressure gauge, as a key instrument with both measurement and control functions, its model selection, structural design and material properties often form the core of the selection process. Today, we will guide you to disassemble these three core dimensions and help you quickly grasp the key points of selection.

1，Common models of photoelectric contact pressure gauges                            
·YXC Series: Basic type photoelectric contact pressure gauge, suitable for general industrial environments.                        
·YXG Series: High Precision Type, with measurement accuracy up to 0.5 grade.                        
·YXK Series: Explosion-proof type, suitable for flammable and explosive environments.                        
·YXW Series: Sanitary Type. Specifically designed for the food and pharmaceutical industries.                        
·YXF Series: Corrosion-resistant type, suitable for highly corrosive media.  

2,Structure: three core components determine the performance of the instrument                            
The structure of the photoelectric contact pressure gauge is designed around "precise measurement + reliable alarm", and it mainly consists of three major modules. Each component has a clear division of responsibilities:

·Measurement mechanism: The core component is the Bourdon tube. When the measured medium enters the tube, the tube body undergoes deformation due to the pressure, and this deformation is transmitted through the connecting rod to rotate the pointer, thereby achieving the mechanical display of the pressure value.  

·Photoelectric conversion mechanism: It consists of a shading plate, a light source, and a photoelectric sensor. When the pointer (or the shading plate linked to the pointer) rotates to the preset upper or lower limit position, the shading plate blocks or conducts the light source, triggering the photoelectric sensor to send a switch signal, thereby achieving pressure alarm or control.

·Shell and junction box: The shell protects the internal components, while the junction box is used to connect the control circuit. Some models may include heat dissipation holes or sealing structures, which are suitable for different environments.   

3,Material: Adaptation to working conditions is the key                            
The material selection should be based on the medium to be measured (such as corrosive liquids, high-temperature gases) and the environment (such as humidity, dust). The core component materials are as follows.  

·Bourdon Tube:

Common media (water, air): Copper alloy (H62 brass), low cost and good toughness;  

Corrosive media (acid and alkali solutions): 316L stainless steel, with strong corrosion resistance;  

High-temperature medium (>150℃): Hastelloy alloy, resistant to high temperatures and creep.                        

·Case:

Normal environment: ABS engineering plastic, lightweight and insulating;

Harsh environments (outdoors, chemical zones): 304 stainless steel, rust-proof, impact-resistant.

·Connection:  

Consistent with the spring tube design, to prevent corrosion caused by different metals in the medium coming into contact, 304 stainless steel and brass are commonly used.  

·Sealing parts:

Nitrile rubber: Resistant to oils and water, with a temperature range of -40 to 120 degrees Celsius.  

Fluorine rubber: Suitable for strong corrosive and high-temperature media, with a temperature range of -20 to 120 degrees Celsius.

Summary:
To select the right photoelectric contact pressure gauge, the key lies in "understanding the model to determine the requirements, grasping the structure and performance, and choosing the appropriate material for the specific application conditions".

We will also share the installation, calibration and practical operation techniques of the instrument. If you have any more suggestions or questions, please feel free to contact us at any time!"