Genuine Dwyer 629HLP Water Pressure Transmitter

Genuine Dwyer 629HLP Water Pressure Transmitter

Dwyer 629HLP-06-P2-S1 Water Differential Pressure Transmitter – ±1% Accuracy, IP65

Posted on: 13/08/2026

Dwyer 629HLP-06-P2-S1 Water Differential Pressure Transmitter – ±1% Accuracy, IP65 Protection

In Chiller systems, cooling towers, and centralized pumping stations, monitoring differential pressure is not merely for data collection—it acts as a critical safeguard against catastrophic failures (like coil freezing or pipe blockages). The Dwyer 629HLP-06-P2-S1 Differential Pressure Transmitter is specifically engineered to solve these challenges, delivering ±1% industrial accuracy alongside rugged environmental endurance.

Dwyer 629HLP-06-P2-S1 Pressure Transmitter - Distributed by DLK
Dwyer 629HLP-06-P2-S1 Pressure Transmitter - Distributed by DLK

1. Superior Features of the 629HLP-06-P2-S1

The Dwyer 629HLP (High Low Pressure) series is a valuable upgrade for compatible liquid and gas measurement, boasting the following characteristics:

  • High Responsiveness: A 50ms response time ensures that the BMS receives instantaneous signals upon abnormal pressure drops across heat exchangers.
  • IP65 Enclosure Rating: The sturdy, dust-tight, and water-resistant housing allows the device to operate reliably in the damp environments of pump rooms or outdoor Chiller installations.
  • Stable Transmission: The standard 4-20mA output (0-10VDC optional) is highly immune to electromagnetic interference, ensuring precise signal transmission to central control panels over long distances.

2. Detailed Technical Specifications

Specification Details
Model 629HLP-06-P2-S1
Manufacturer Dwyer (USA)
Service Media Compatible gases and liquids (Chilled water, hot water, etc.)
Accuracy ±1% Full Scale (FS)
Output Signal 4-20 mA (voltage options available)
Response Time 50 ms
Process Connections Industrial standard NPT or BSP
Enclosure Rating IP65 (NEMA 4X equivalent)

3. Professional Installation Guidelines

  1. It is highly recommended to install the transmitter alongside a 3-valve manifold to easily isolate the sensor, perform zero-balancing, and conduct maintenance without draining the system.
  2. Ensure that all impulse lines connecting the main pipe to the sensor are completely bled of air. Trapped air bubbles in water pressure lines will cause severe measurement inaccuracies.
  3. Connect the High (H) port to the upstream pressure source and the Low (L) port to the downstream side of the heat exchanger or pump.
  4. Securely tighten the cable glands and electrical connectors to maintain the IP65 waterproof rating integrity.
⚠️ Application Pro-Tip: A severe DP drop across a Chiller's evaporator indicates low water flow, leading to potential freezing and copper tube rupture. Utilizing the 629HLP as a safety interlock is a mandatory practice in modern HVAC design.

4. Where to Buy Genuine Dwyer 629HLP?

Using counterfeit equipment for critical protection devices poses immense risks. DLK TRADING SERVICE COMPANY LIMITED is the direct distributor of Dwyer products in Vietnam.

  • ✅ Complete CO and CQ documentation.
  • ✅ Technical support to select the appropriate measurement range for your Chiller/Pump capacities.
  • ✅ 12-month standard warranty.

📞 Contact DLK for Project Quotations