The WIKA FSM-6100 is an electromechanical flow switch designed to monitor liquid flow and detect no-flow conditions. When the flow falls below the configured switching point, the switch changes state to activate a connected alarm, controller or protective circuit.
Its paddle-operated mechanism, protective bellows and robust stainless steel components make it suitable for industrial cooling and heating systems where reliable flow monitoring helps prevent equipment damage.
Key Features
- No-flow detection: Helps identify interrupted liquid flow.
- Switch point repeatability: ±5% of span.
- Long service life: Microswitch designed for more than 500,000 cycles.
- Stainless steel paddle: Designed to withstand pressure surges and elevated medium temperatures within rated limits.
- Electrical switching: SPDT contact for monitoring, control and alarm applications.
- Wide pipe-size compatibility: Suitable for nominal pipe sizes from 1 to 6 inches, depending on configuration.
- Compact housing: Plastic enclosure with IP30 ingress protection.
- Compatible media: Water, ethylene glycol and other liquids that are compatible with the wetted materials.
Suitable Applications
- Industrial Heat Exchangers: Monitor cooling-water flow.
- HVAC Systems: Protect heating and cooling equipment.
- Water Treatment Plants: Monitor liquid supply in compatible systems.
- Pumps and Dosing Systems: Detect interrupted liquid flow.
- Industrial Cooling Systems: Help prevent overheating or freezing caused by insufficient flow.
- Machinery Protection: Trigger alarms or control circuits when flow is interrupted.
Technical Highlights & Selection Considerations
- Pipe Size: Confirm compatibility with the pipe diameter and installation arrangement.
- Switching Point: Select and adjust the switching point to match the required operating flow.
- Process Connection: Verify the required thread standard, such as NPT or BSPT.
- Medium Compatibility: Confirm that the liquid is compatible with the brass, phosphor bronze, stainless steel and sealing materials used in the selected configuration.
- Operating Conditions: Check operating pressure, medium temperature and flow range against the manufacturer's specifications.
- Electrical Requirements: Verify the contact configuration, switching voltage and current for the connected control or alarm circuit.
- Installation: Follow the manufacturer's instructions for paddle orientation, flow direction and installation position.
Frequently Asked Questions (FAQ)
Q1: What is the WIKA FSM-6100 used for?
It monitors liquid flow and detects interrupted flow in industrial pipelines, heat exchangers, cooling systems and compatible heating equipment.
Q2: How does the FSM-6100 work?
Liquid flow moves the paddle mechanism. When flow reaches the configured switching condition, the internal microswitch changes state to activate a connected control, alarm or protective circuit.
Q3: What liquids can the FSM-6100 monitor?
It is intended for water, ethylene glycol and other non-corrosive liquids compatible with its wetted materials. Confirm material compatibility before use.
Q4: What is the switching repeatability?
The specified switch point repeatability is ±5% of span.
Q5: Does the FSM-6100 provide a continuous flow-rate signal?
No. It is an electromechanical flow switch designed for switching and flow monitoring, rather than a continuous analogue flow transmitter.
Q6: What information is needed for a quotation?
Provide the model, pipe size, process connection, required switching point, liquid type, operating pressure, medium temperature and electrical switching requirements.
