FD-Q50C Keyence Clamp-On Flow Sensor
The Keyence FD-Q50C is a clamp-on ultrasonic flow sensor purpose-built for non-intrusive, high-flow liquid measurement on large pipe sizes. Compatible with 1½″ and 2″ metal or resin pipes, it supports flow rates up to 500 L/min and offers dual analog/digital output, selectable response times, and robust IP65/IP67 environmental protection. Ideal for fluid management across process industries, chemical lines, and water systems.
Technical Specifications
Model: FDQ50C
Series: Keyence FD-Q
Mounting Type: Clamp-on (External)
Connector Type: M12, 4-pin
Weight: Approx. 640 g (incl. bracket)
Detection & Flow Specs
- Pipe Compatibility:
- 1½” (40A): ø44–ø52 mm
- 2″ (50A): ø52–ø64 mm
- Pipe Materials: Metal / Resin
- Fluid Types: Water, oils, chemicals
- Fluid Temp Range: 0 to 85 °C (No freezing)
- Max Flow Rate:
- 40A: 400 L/min (105.7 G/min)
- 50A: 500 L/min (132.1 G/min)
- Zero Cut Flow: 25 L/min (default)
- Display Resolution: 0.1 / 1 L/min (default: 1)
- Display Refresh Rate: 3 Hz
I/O & Output Options
- Output Channels (x2):
- Control Output
- Pulse Output
- Error Output
- Selectable NPN/PNP
- Max: 30 VDC, 50 mA
- Analog Output:
- 4–20 mA or 0–20 mA
- Max Load: 500 Ω
- External Input Options:
- Integrated Flow Reset
- Flow Rate Zero
- Origin Adjustment
- Hysteresis: User-selectable
- Integrated Flow Totalizer: 1 / 10 / 100 / 1000 / 10000 L (default: 1)
- Memory Backup: EEPROM (10+ year retention)
- Data Logging Interval: Every 10 s
Response Time & Repeatability
- Selectable Response Times:
- 0.5 / 1 / 2.5 / 5 / 10 / 30 / 60 s
- Repeatability (% of full scale):
- ±2.0% (0.5 s)
- ±0.15% (60 s)
Power & Electrical Specs
- Operating Voltage: 20–30 VDC (Ripple ≤10%, Class 2/LPS)
- Current Consumption: ≤130 mA (excluding load)
- Protection Circuits:
- Reverse Polarity
- Surge
- Output Short-Circuit
Environmental & Mechanical Ratings
- Enclosure Rating: IP65 / IP67
- Ambient Temperature: -10 to +60 °C
- Humidity Range: 35% to 85% RH (No condensation)
- Vibration Resistance: 10–55 Hz, 1.5 mm double amplitude, 2 hr per axis
- Shock Resistance: 100 m/s² (16 ms pulse), 1,000 shocks per axis
Construction Materials
- Main Housing: PPS / PES / PBT
- Mounting Hardware: SUS303 / SUS304 / SUSXM7
- Sealing Components: High-durability elastomers
- Cable Sheath: PVC (connector type)
Key Features & Benefits
✅ Non-Contact Clamp-on Design: No need to modify or cut pipes, ensuring easy installation and maintenance.
✅ Versatile Pipe Compatibility: Works with both metal and resin pipes ranging from ø44 to ø64 mm.
✅ Broad Fluid Compatibility: Supports water (including DI), oils, and various chemicals for wide-ranging industrial applications.
✅ Advanced Display & Monitoring: Dual-row LED display, stability indicators, and selectable response times for precision control.
✅ Selectable Output Options: Supports control output, pulse output, and error output with both NPN/PNP switchable configurations.
📦 Order Today for Fast UK & Europe Delivery!
At Drive Outlet Megastore, we offer the best Keyence FD-Q50C prices, with same-day and next-day shipping across the UK & Europe.
For expert assistance with the FD-Q50C clamp-on sensor, or help choosing the right model for your system, contact Drive Outlet Megastore.
Our experienced team is ready to help you integrate flow monitoring into your industrial process with confidence.

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