FM200 Water Flow Detector Switch plays a crucial role in modern fire protection systems. Designed by Weflo, this vane-type flow switch ensures accurate water flow detection within sprinkler systems. With a durable die-cast housing and international certifications, it offers a dependable solution for both indoor and outdoor environments.
Unlike many conventional switches, the FM200 flow detector functions effectively across various applications thanks to its robust design and consistent performance.
Key Features of the FM200 Water Flow Detector Switch
Weflo engineers have packed this device with features that enhance safety, reliability, and usability:
- Vane-type mechanism ensures reliable water flow detection
- UL Listed, ULC Listed, and FM Approved for compliance with safety standards
- Corrosion-resistant, die-cast aluminum housing protects internal components
- Works in temperatures from 0°C to 68°C, suitable for indoor and outdoor use
- Features a mechanical delay mechanism that prevents false alarms
- Activates when water flow exceeds 10 gallons per minute
- Avoids false triggers if the flow rate is below 4 gallons per minute
- Fits steel pipes ranging from 2” to 8” (50mm to 200mm), Schedule 10 through 40
- Includes tamper-resistant cover, with one removal key included per unit
How the FM200 Flow Switch Works
Unlike electronic sensors, this switch uses a vane inside the pipe to detect water movement. When water flows due to sprinkler activation, the vane shifts and triggers the internal switch. However, the built-in delay ensures the system only responds to sustained flow—not brief surges.
If the flow persists and exceeds 10 GPM, the switch activates and sends a signal to the fire alarm control panel or FM200 suppression system. This way, building occupants and first responders receive timely alerts, improving fire safety response.
Ideal Applications
Because of its reliability and broad compatibility, this water flow switch works well in several critical environments:
- FM200 suppression systems
- Data centers and server rooms
- Telecommunication facilities
- Industrial buildings with sprinkler systems
- Any system needing accurate and delayed water flow detection
Additionally, facility managers often choose this model for its tamper-resistant cover, which prevents unauthorized access and ensures system integrity.
Why Choose the Weflo FM200 Flow Detector?
Choosing the Weflo FM200 Flow Switch means investing in accuracy, durability, and compliance. Unlike generic models, this device offers certifications from UL, ULC, and FM, which proves it meets international standards. Its robust housing withstands tough conditions, while its precise delay mechanism reduces nuisance alarms.
