Dwyer Series 628-75 Pressure Transmitter – Comparing S5 & S1 Versions

Dwyer’s Series 628 provides a wide array of electrical connection options to suit specific control system requirements. Two of the most popular versions distributed by DLK are the 628-75-GH-P1-E1-S5 and the 628-75-GH-P1-E1-S1. They differ primarily in their output signals and connection configurations.

Dwyer 628-75-GH-P1-E1-S5 Pressure Transmitter - Distributed by DLK

1. Introduction to the Series 628-75

Both models are part of the robust Dwyer Series 626 & 628 industrial pressure transmitters. They feature durable 316L stainless steel wetted materials and are UL certified. These transmitters are ideal for liquid media, designed for continuous pressure monitoring, and integrate seamlessly into control systems, BMS, or PLC networks.

2. Detailed Specifications

Dwyer 628-75-GH-P1-E1-S1 Pressure Transmitter - Distributed by DLK

3. Installation and Operation Guide

1. Inspect the sensor prior to installation to ensure there is no damage or denting to the housing or connection heads.
2. Install the transmitter at the pressure measuring point using the appropriate process thread for the selected model (S5 or S1). Tighten securely but avoid excessive manual force.
3. Connect the power supply according to the required voltage range (10-30 VDC or 13-30 VDC depending on the output signal type).
4. Wire the output signal to the controller, PLC, or BMS system following the specific electrical connection type of the model (wire lead, Hirschman, M12, etc.).
5. Power up the unit and verify the output signal using a multimeter to confirm correct operation.
6. Compare the reading with the actual pressure at the measurement point to confirm accuracy.

4. Common Applications

• Water pressure monitoring in pump stations and water supply/drainage pipelines.
• Integrating pressure signals into BMS/SCADA systems for automated control.
• Chiller and cooling tower systems requiring continuous liquid pressure measurement.
• Industrial automation and production lines that need real-time pressure feedback.

5. Why Purchase the Series 628-75 from DLK?

• ✅ 100% Genuine Dwyer products, UL certified, and directly imported by DLK.
• ✅ Technical advice to select the correct version (S5/S1) compatible with your control system.
• ✅ Provision of full catalogs, manuals, and datasheets for project documentation.
• ✅ Transparent warranty and prompt technical support.