1. What Is a Pressure Switch?

A pressure switch functions as a pressure-sensitive switch that converts a physical pressure signal into an electrical signal. It operates by using a sensor (diaphragm, piston, or bourdon tube) that responds to pressure changes and triggers a set of electrical contacts.

When pressure exceeds or drops below the set limit, the pressure switch will automatically open or close the electrical circuit.

2. Main Functions of a Pressure Switch

• Safety Control
  Protects systems from overpressure that may cause leaks, bursts, or accidents.

• Automation
  Helps operate pumps or compressors automatically, turning them on and off as needed.

• Energy Efficiency
  By preventing equipment from running unnecessarily, pressure switches reduce energy consumption and operational costs.

• Preventive Maintenance
  Detects abnormal conditions early, minimizing damage to machines and pipelines.

3. Working Principle of a Pressure Switch

The working process of a pressure switch consists of three main stages:

1. Sensing Pressure
   Pressure from fluid or gas enters the sensor element (diaphragm/piston).

2. Triggering Mechanism
   The movement of the sensor changes when pressure reaches the set point.

3. Switching Electrical Contacts
   The switch either closes (ON) or opens (OFF), controlling the connected equipment.

For example, in a water pump system, when pressure drops below the minimum, the switch activates the pump. When the maximum pressure is reached, the switch turns it off.

4. Types of Pressure Switches

Several types of pressure switches are commonly used in industries:

• Mechanical Pressure Switch
  Uses a spring mechanism and diaphragm. Simple, reliable, and widely used.

• Electronic Pressure Switch
  Provides digital output with higher accuracy and programmable settings.

• Differential Pressure Switch
  Measures pressure differences between two points in the system.

• Vacuum Pressure Switch
  Designed for applications requiring monitoring of negative pressure or vacuum.

5. Applications of Pressure Switches in Industry

Pressure switches are widely used in various sectors, such as:

• Oil & Gas Industry → Controls pumps, compressors, and pipelines.

• Manufacturing → Ensures pneumatic and hydraulic systems run safely.

• Construction → Supports heavy equipment requiring stable pressure.

• HVAC Systems → Regulates compressors in air conditioning systems.

• Water Treatment Plants → Automates pumps for efficient water flow.

6. Pressure Switch and Industrial Materials

The performance of a pressure switch is closely related to the quality of materials in the system. If pipes, flanges, and fittings used are not durable, even the most advanced pressure switch will not function optimally.

That is why choosing high-quality materials such as carbon steel pipes, stainless steel flanges, and precision fittings is essential to ensure safety and long-term efficiency.

7. TABS – Supporting Industrial Projects with Quality Materials

PT Trijaya Anugrah Bina Steel (TABS) is a trusted supplier of industrial and construction materials in Indonesia. Besides understanding the importance of devices like pressure switches, TABS provides complete stock of supporting materials, including:

• Steel Pipes (mild steel, carbon steel, stainless steel)

• Flanges (PN16, PN40, ANSI, JIS, DIN standards)

• Pipe Fittings: elbows, tees, reducers, couplings, and more

• Steel Plates and Alloy Materials for high-pressure systems

With warehouses located in Surabaya, Gresik, and Jakarta, TABS ensures ready stock and fast delivery to support projects across Indonesia.