WFS-1001-H – Flow Switch for HVAC Systems

In HVAC (Heating, Ventilation, and Air Conditioning) systems, monitoring water flow is critical to ensure optimal cooling/heating performance and to protect system components from damage.

The WFS-1001-H – a flow switch from Dwyer Instruments (USA) – is specifically designed to detect and monitor water flow in pipelines, helping the system operate safely, save energy, and extend equipment lifespan.

1. Product Overview

WFS-1001-H is a mechanical flow switch designed for water pipelines in HVAC systems. It operates on a simple principle: when water flow reaches a preset threshold, the internal switch is triggered, sending a signal to the controller or BMS.

Key design features:

• Durable, corrosion-resistant metal housing

• Stainless steel paddle suitable for both hot and cold water

• Easy installation on various pipe sizes via threaded or flanged connections

2. Main Technical Specifications

• Pipe size range: DN25 – DN200 (1” – 8”)

• Max working pressure: 10 bar

• Fluid temperature range: 0 – 100°C

• Body material: Brass or corrosion-resistant alloy

• Paddle material: SUS304 stainless steel

• Output contact: SPDT, rated 10A / 250VAC

These specifications make the WFS-1001-H well-suited for demanding commercial and industrial HVAC systems.

3. Outstanding Advantages

More than a basic flow sensor, the WFS-1001-H delivers multiple operational benefits:

• Continuous water flow monitoring ensures chillers/heaters operate within set parameters

• Prevents system failures: auto shut-off in case of no flow, protecting pumps and chillers

• High durability: pressure and temperature resistant, ideal for harsh environments

• Easy maintenance: simple structure for quick replacement and servicing

• Flexible integration: easily connects to BMS or alarm system

4. Applications in HVAC Systems

WFS-1001-H is widely used in:

• Chiller and cooling systems – monitoring cooling or chilled water flow

• Heating systems – ensuring safe operation by detecting hot water flow

• Circulation pumps – preventing dry-run damage to pump motors

• Industrial water supply – ensuring stable pressure and flo

5. DLK – Authorized Distributor in Vietnam

When purchasing the WFS-1001-H from DLK, customers receive:

• Genuine Dwyer products with full CO/CQ documentation

• In-depth technical consultation tailored to each HVAC system

• Support for installation and BMS integration

• Official warranty and dedicated after-sales service

With its durable design, accurate flow monitoring, and protection features, WFS-1001-H is the ideal solution for controlling water flow in HVAC systems.