Dwyer 629C Differential Pressure Transmitter | Reliable Pressure Monitoring for HVAC, Chiller, and Industrial Systems

Dwyer Series 629C – Why Measuring Water Differential Pressure Is Essential for HVAC, Water Treatment, and Industrial Systems In HVAC systems, chillers, and industrial processes, accurate differential pressure monitoring plays a vital role in maintaining efficiency and protecting equipment. The Dwyer Series 629C is a differential pressure transmitter specifically designed for demanding environments, offering exceptional stability, accuracy, and durability.

1. What Does Differential Water Pressure Indicate?

In cooling, water filtration, or industrial heat exchange systems, monitoring the pressure difference between two points provides critical insights for system engineers.
By analyzing differential pressure values, you can quickly determine:

💧 Whether the filter is clogged – An increasing pressure difference indicates the filter needs cleaning or replacement.
⚙️ Whether the pump is operating properly – If the differential pressure drops below normal, the pump may be malfunctioning or the system might have a leak.
🔄 Whether the water or liquid flow is stable – This ensures efficient operation of heat exchangers, chillers, and pipelines.

To accurately monitor these parameters, a high-quality differential pressure sensor should feature:

• High accuracy (typically ±0.5% FS),

• Stable operation in humid or high-pressure environments,

• Output signal compatibility with PLC, BMS, or local display systems.

2. Reference: Dwyer difference pressure transmiter Series 629C – Standard Features to Look For in a Differential Pressure Transmitter

✅ Rugged housing for harsh environments
Die-cast aluminum enclosure rated NEMA 4X / IP66, fully sealed against dust and water — ideal for water treatment plants, cooling systems, and outdoor installations.

✅ High accuracy with minimal drift
Accuracy of ±0.5% FS ensures reliable pressure readings even under temperature and load variations.

✅ Easy installation and maintenance
Removable terminal block and internal zero/span adjustments under the protective cover allow quick calibration without removing the sensor from the system.

✅ Flexible output signals – compatible with most control systems
Selectable output of 4–20 mA or 0–10 VDC, easily integrated with PLC, DDC, or BMS systems.

✅ Corrosion-resistant wetted materials
All wetted parts are made of 316L stainless steel, providing excellent resistance to corrosion and high pressure — suitable for water, oil, and mild chemical applications.

3. Typical Applications

The Dwyer 629C is widely used across industries:

🌡️ HVAC / Chiller Systems:
Monitor pressure differential across heat exchangers or circulation pumps to optimize energy efficiency.

💧 Water Filtration and Treatment Plants:
Measure pressure difference across filter elements to determine the right time for replacement, reducing maintenance costs.

⚙️ Industrial and Energy Systems:
Used for differential pressure measurement in pipelines, storage tanks, and process monitoring in chemical and food industries.

4. Key Advantages of the Dwyer 629C

• Trusted U.S. brand with decades of expertise in pressure measurement.

• Factory-calibrated for high accuracy and reliability.

• Officially distributed by DLK in Vietnam, with local technical support, spare parts, and warranty service.

Technical Summary

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📞 Contact us today for model selection support and an official quotation for the Dwyer 629C Differential Pressure Transmitter.

DLK Trading Service Limited Company

📍 Address: 111/7 Vuon Lai Street, Phu Tho Hoa Ward, Ho Chi Minh City, Vietnam
📞 Hotline: +84 70 357 0101
📧 Email: info@dlk.com.vn
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