Differential Pressure Switch

A Differential Pressure Switch (DP Switch) is an industrial device that monitors the difference in pressure between two points and triggers an action (such as turning on/off a pump, fan, or alarm) when the pressure reaches a set limit. It is widely used in HVAC systems, water treatment, oil & gas, pharmaceuticals, power plants, and manufacturing industries in Bangladesh. With the country’s growing focus on industrial automation, the demand for reliable differential pressure switches is increasing rapidly.

What is a Differential Pressure Switch?

Unlike a normal pressure switch, which responds to absolute pressure, a differential pressure switch compares two pressure points. When the difference exceeds or falls below a preset threshold, the switch activates an electrical contact. This makes it ideal for monitoring filter conditions, airflow, and fluid systems.

Applications in Bangladesh

Differential pressure switches play a critical role across many industries:

• HVAC Systems – Monitoring airflow and filter blockages.

• Water Treatment Plants – Checking pump efficiency and filter clogging.

• Pharmaceutical Industry – Maintaining cleanroom pressure balance.

• Food & Beverage – Ensuring hygiene and safe processing.

• Oil & Gas – Monitoring pipelines and separators.

• Power Plants – Protecting boilers, turbines, and compressors.

Benefits of Using a Differential Pressure Switch

• Ensures safe operations by detecting abnormal pressure differences.

• Helps in energy efficiency by indicating filter replacement time.

• Protects equipment from overpressure damage.

• Provides automation support in industrial systems.

• Simple, durable, and reliable in harsh environments.

Availability in Bangladesh

In Bangladesh, differential pressure switches from international brands such as Danfoss, Honeywell, Siemens, WIKA, Yokogawa, and ABB are available through local suppliers, distributors, and engineering companies. These products are commonly supplied in industrial hubs like Dhaka, Chittagong, Gazipur, and Narayanganj.

Price Range of Differential Pressure Switch in Bangladesh

The price depends on the brand, model, accuracy, and application:

• Standard Models – ৳8,000 – ৳20,000.

• Industrial Grade & Digital Models – ৳25,000 – ৳60,000+.

Differential Pressure Switch Service in Bangladesh

To ensure accurate and reliable operation, professional services are available, including:

• Installation & commissioning.

• Calibration & accuracy testing.

• Preventive maintenance.

• Repair & parts replacement.

• Annual service contracts for industries.

Conclusion

The Differential Pressure Switch is an essential device in Bangladesh’s industrial and commercial sectors, ensuring safe, efficient, and automated operations. With wide availability from global brands and reliable local service support, industries can maintain accuracy and efficiency while reducing downtime and risks.