GEMS Sensors Piston-Type Flow Switch
Model: FS-200E-A
Part No.: 020-2413
1. General Description
The GEMS FS-200E-A is a robust, piston-type flow switch designed to accurately monitor liquid flow rates in industrial applications. Its durable bronze housing makes it ideal for use with water, oils, and other compatible fluids in process lines, cooling circuits, and lubrication systems.
It operates by using the flow of the liquid to displace a spring-loaded piston. A magnet in the piston actuates a hermetically sealed reed switch within the unit’s stem, providing a simple, reliable on/off signal once the flow rate reaches the setpoint. This “E” version features an adjustable setpoint.
Key Features 🎯
- Adjustable Setpoint: The flow actuation point can be adjusted by the user.
- Durable Construction: Features a robust bronze housing for long life in industrial environments.
- High-Reliability Switching: Uses a hermetically sealed reed switch for dependable operation.
- Versatile Electricals: Capable of switching both AC and DC loads up to 250V.
- Any-Position Mounting: Can be installed in any orientation without affecting performance.
2. Technical Specifications
Electrical Data (from label)
| Parameter | Value |
| Max. Voltage | 250 V AC/DC |
| Max. Current | 0.5 A |
| Max. Power (VA) | 20 VA |
| Switch Type | SPST Reed Switch, (Typically Normally Open) |
Performance & Operating Data
| Parameter | Value |
| Adjustable Flow Range | 3.0 … 22.5 litre/min |
| Media | Liquids (e.g., Water, Oil) |
| Connection (CONN) | 94636 (Refers to cable/connector type) |
| Country of Origin | Basingstoke, England |
Mechanical & Environmental Data
| Parameter | Value |
| Housing Material | Bronze |
| Process Connection | G 1 (1″ BSPP) (Typical for this series) |
| Connection | Pre-cabled |
| Protection Class | IP65 (Typical) |
3. Wiring & Operation
This is a 2-wire switch. It is connected in series with the load it is controlling (e.g., a PLC input, an indicator light, or a relay coil).
- Operation: The switch is Normally Open (NO) when there is no (or low) flow. When the liquid flow increases to the user-adjusted setpoint, the piston moves, and the reed switch closes, completing the circuit.
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