FD-XS20 Keyence Flow Sensor Head | High-Precision Liquid Monitoring

Manufacturer: Keyence
Product No.: FD-XS20
Condition： In stock
Product Type: Flow Sensor Head
Product Origin: TW
Payment: T/T, Western Union
Weight: 260g
Shipping port: Xiamen
Warranty: 12 months

Quantity

Selected quantity: 1

Estimate delivery times: 12-26 days (International), 3-6 days (United States).

Return within 30 days of purchase. Duties & taxes are non-refundable.

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FD-XS20 | KEYENCE Flow Sensor Head for Precision Liquid Monitoring

The KEYENCE FD-XS20 is a liquid flow sensor head designed for industrial process monitoring. It supports a maximum rated flow of 20 L/min with compatible pipe configurations. Its clamping accessories accommodate specified metal and plastic pipes without requiring a dedicated sensor head for each material type.

Engineers can use this sensor head to monitor liquid flow in production equipment, process lines, and automated fluid delivery systems. Supported fluids include water, oil, adhesives, grease, and chemical solutions. Actual suitability depends on pipe dimensions, fluid properties, and installation conditions.

The sensor supports high-resolution flow monitoring through a compatible controller. Response-time selection affects repeatability and measurement stability. Engineers should evaluate the required measurement range and process response before selecting operating settings.

01 | Product Identity and Operating Envelope

Parameter	Specification
Brand	KEYENCE
Model	FD-XS20
Product Type	Liquid flow sensor head
Maximum Rated Flow	Up to 20.00 L/min, depending on pipe diameter
Supported Pipe Materials	Metal and soft or hard plastic
Supported Fluids	Water, oil, adhesives, grease, and chemical solutions
Pipe Surface Temperature	0°C to 100°C, without freezing on the pipe surface
Ambient Operating Temperature	-10°C to +60°C, without freezing
Relative Humidity	35% to 85% RH, non-condensing
Protection Rating	IP65/IP67 under IEC 60529; IP68G under JIS C0920
Approximate Weight	260 g

02 | Flow Capacity by Pipe Size

The maximum rated flow depends on the pipe's outside diameter. Select the correct clamp set and verify the actual pipe dimensions before installation.

Pipe Outside Diameter	Maximum Rated Flow
3/8 in. (9.53 mm)	15.00 L/min
10 mm (0.39 in.)	15.00 L/min
10.5 mm (0.41 in.)	15.00 L/min
12 mm (0.47 in.)	20.00 L/min
1/2 in. (12.7 mm)	20.00 L/min
13.8 mm (0.54 in.)	20.00 L/min

Selection note: Do not select the sensor using maximum flow alone. Match the pipe outside diameter, clamp type, expected flow, and required measurement stability.

03 | Clamp Set Selection Guide

The appropriate clamp set depends on the pipe material and compatible pipe dimensions. Confirm the complete installation combination against the KEYENCE documentation.

Pipe Category	Compatible Clamp Set Models	Material Information
Plastic Pipe or Tube	FD-XC20R1, FD-XC20R2, FD-XC20R3, FD-XC20R4	PPS body and fixing screw; special rubber detection surface; FKM pipe support rubber
Metal Pipe	FD-XC20M1, FD-XC20M2	SUS304/SUSXM7 metal components; special rubber detection surface; FKM clamp support rubber

Plastic piping: Confirm the tube's outside diameter and mechanical stability.
Metal piping: Confirm the pipe dimensions and compatible metal clamp model.
Replacement projects: Check the existing clamp set's part number before ordering.
Mixed installations: Select accessories according to each measurement point's pipe material and geometry.

04 | Resolution, Repeatability, and Response Time

The sensor offers selectable standard and high-resolution display formats through a compatible controller. The selected response time affects the specified instantaneous-flow repeatability.

Standard and High-Resolution Display

Parameter	Standard Mode	High-Resolution Mode
Zero-Cut Flow Rate	0.10 L/min	40 mL/min
Instantaneous Flow Display	0.001 / 0.01 / 0.1 L/min	0.1 / 1 / 10 mL/min
Shot Amount Display	0.001 / 0.01 / 0.1 L	0.001 / 0.01 / 0.1 / 1 mL
Integrated Flow Display	0.01 / 0.1 / 1 / 10 / 100 L	0.1 / 1 / 10 / 100 / 1000 / 10000 mL

The displayed resolution represents the available display increment. It does not independently establish measurement accuracy or absolute uncertainty.

Plastic Pipe Attachment: Repeatability

Response Time	Pipe Outside Diameter	Specified Repeatability
50 ms	3/8 in. (9.53 mm) or 10 mm	±15 mL/min
50 ms	12 mm or 1/2 in. (12.7 mm)	±20 mL/min
500 ms	3/8 in. (9.53 mm) or 10 mm	±4.7 mL/min
500 ms	12 mm or 1/2 in. (12.7 mm)	±6.3 mL/min
50 ms	Full-scale repeatability	±0.1% F.S.

Metal Pipe Attachment: Repeatability

Response Time	Pipe Outside Diameter	Specified Repeatability
50 ms	3/8 in. (9.53 mm), 10 mm, or 10.5 mm	±23 mL/min
50 ms	12 mm, 1/2 in. (12.7 mm), or 13.8 mm	±30 mL/min
500 ms	3/8 in. (9.53 mm), 10 mm, or 10.5 mm	±7.2 mL/min
500 ms	12 mm, 1/2 in. (12.7 mm), or 13.8 mm	±9.5 mL/min
50 ms	Full-scale repeatability	±0.15% F.S.

Engineering interpretation: A 500 ms response provides better specified repeatability than a 50 ms response in the listed configurations. Use the faster response when process dynamics require it. Use the slower response when stable readings matter more than rapid updates.

Hysteresis is variable. The supplied specifications do not establish a universal accuracy, linearity, or frequency-response value. Consult the applicable technical manual for these parameters.

05 | Environmental Durability and Construction

Environmental Parameter	Specification
Ambient Temperature	-10°C to +60°C
Pipe Surface Temperature	0°C to +100°C
Relative Humidity	35% to 85% RH, without condensation
Vibration Resistance	10–55 Hz; 1.5 mm double amplitude; 2 hours per X, Y, and Z axis
Shock Resistance	50 G for 11 ms; three impacts per X, Y, and Z axis
Head Body Material	PPS/PPSU
In-Cable Amplifier Material	PPS
Cable Material	PVC
Controller Connector Materials	PPS/PBT/POM

The stated ingress protection ratings describe the specified sensor protection conditions. They do not automatically establish chemical compatibility with every fluid or cleaning agent.

Before installation, evaluate fluid leakage risks, chemical exposure, pipe temperature, vibration, and cable routing. Keep the sensor within its specified ambient limits.

06 | Suitable Equipment and Industrial Applications

This sensor head suits liquid monitoring tasks where compatible piping and a suitable controller are available. The actual application must remain within the rated flow and temperature limits.

Water circulation equipment: Monitor cooling-water or process-water flow in compatible pipework.
Oil delivery systems: Track oil flow in suitable lubrication or fluid supply arrangements.
Adhesive dispensing machines: Monitor adhesive delivery when fluid properties and pipe materials suit the installation.
Grease supply systems: Assess flow behavior in compatible fluid delivery lines.
Chemical dosing equipment: Monitor solution flow after verifying chemical compatibility and the applicable installation requirements.
Automated production equipment: Support flow monitoring for liquid transfer and machine process control.
Maintenance and process troubleshooting: Help identify abnormal flow behavior when paired with suitable monitoring and control equipment.

Important: These are potential application categories, not universal compatibility guarantees. Verify the fluid, pipe construction, pipe diameter, and required operating range before deployment.

07 | Diagnostic Value and Field Troubleshooting

The sensor head can support process diagnosis when its flow readings are interpreted alongside machine status and operating conditions. The supplied specifications identify a status indicator and controller-displayed flow values. They do not confirm an independent onboard event log or comprehensive fault history.

Observed Condition	Checks to Perform
Displayed flow remains at zero	Check whether the actual flow exceeds the configured zero-cut threshold. Verify the clamp installation and controller connection.
Readings fluctuate unexpectedly	Inspect pipe support, sensor positioning, process stability, and possible vibration. Compare readings using a suitable response-time setting.
Flow readings appear consistently low	Confirm the pipe outside diameter, clamp model, fluid conditions, and actual process flow.
High-resolution readings appear unstable	Check whether the application needs the selected resolution and response time. Compare trends under stable operating conditions.
Intermittent measurement interruptions	Inspect the cable, controller connector, mounting security, and operating environment.
Unexpected readings after maintenance	Verify the sensor's position, clamp compatibility, and configuration before changing process parameters.

Field example: A liquid dispensing machine shows inconsistent shot quantities. The engineer checks the configured zero-cut value and confirms the correct clamp set. The engineer then compares stable-flow readings at 50 ms and 500 ms response settings. This process helps distinguish response-related variation from installation or process issues.

08 | Global PLC Spare HUB's Insight

For flow sensor selection, pipe compatibility and low-flow behavior deserve as much attention as maximum rated flow. An incorrect clamp set can undermine an otherwise suitable measurement arrangement.

Practical recommendation: Start with the actual pipe outside diameter and material. Next, estimate the normal flow, minimum detectable flow, and required response time. Finally, confirm the compatible controller and accessory models.

For intermittent dosing, a slower response may provide more stable readings. For rapidly changing processes, a faster response may be preferable. Test the selected configuration under representative process conditions before finalizing the control strategy.

Global PLC Spare HUB Review: The FD-XS20 is worth evaluating when a production line needs compact liquid flow monitoring across compatible metal or plastic pipes. Its selectable display formats and specified response-time options help engineers balance readability and repeatability. Successful integration still depends on correct accessories, controller compatibility, and application-specific validation.

09 | Installation and Commissioning Checklist

Identify the pipe. Record its material and outside diameter.
Select the clamp. Match the accessory model to the pipe configuration.
Check the process. Confirm expected flow and pipe surface temperature.
Install the sensor. Follow the manufacturer's mounting and positioning instructions.
Connect the controller. Verify the compatible controller and connector arrangement.
Set the measurement mode. Select the required display resolution, zero-cut value, and response time.
Verify operation. Compare readings against a suitable process reference under stable conditions.
Document the setup. Record the model, clamp set, pipe dimensions, and selected parameters.

Do not infer a universal installation orientation or required straight-pipe length from the specifications listed here. Consult the official installation manual for mounting details.

10 | Packaging, Shipping, and Warranty

Product model: KEYENCE FD-XS20 flow sensor head.
Accessories: Clamp sets are identified separately by model. Confirm whether the required clamp set and controller are included in the quotation.
Packaging: Protective packaging suitable for industrial sensor equipment.
Shipping methods: FedEx, UPS, and DHL, subject to destination and service availability.
Dispatch target: 24–48 hours after order confirmation, subject to stock availability and payment verification.
Warranty: 12 months under the applicable sales terms.

Warranty coverage applies to eligible product issues under the agreed terms. Contact our team for applicable exclusions, return authorization, and after-sales support procedures.

11 | Five Professional FAQs

Q1: How should I evaluate this sensor for viscous fluids?

Review the fluid's viscosity, operating temperature, pipe material, and required flow range. The specifications list adhesives, grease, and oil as supported fluid categories. However, they do not provide universal viscosity limits. Confirm suitability for the actual fluid before purchase.

Q2: What should I consider when monitoring small dispensing quantities?

Check the high-resolution display options and the 40 mL/min default zero-cut setting. Confirm the minimum process flow and required shot quantity. A suitable display increment does not guarantee equivalent measurement accuracy at low flow.

Q3: How can I choose between the plastic-pipe and metal-pipe accessories?

Identify the pipe material and exact outside diameter first. Then select a compatible clamp set from the listed FD-XC20R or FD-XC20M series. Confirm the final combination in the manufacturer's accessory documentation.

Q4: What checks matter when replacing an existing flow sensor?

Record the existing sensor model, controller model, clamp set, pipe dimensions, and configuration settings. Confirm connector compatibility and supported operating conditions. Do not assume that a matching physical size guarantees electrical or system compatibility.

Q5: How should I validate flow readings before using them in a production control loop?

Compare the readings with an appropriate reference under stable, representative conditions. Test the response-time setting and confirm low-flow behavior around the zero-cut threshold. Document the observed variation before using readings for dosing, alarms, or automated adjustments.

Request a Quote for KEYENCE FD-XS20

Looking for the KEYENCE FD-XS20 for liquid monitoring or equipment maintenance? Global PLC Spare HUB can assist with quotation requests, availability checks, and accessory selection.

Provide your required quantity and destination country.
Share the pipe material and outside diameter.
Identify the existing controller and required clamp set.
Describe the fluid and expected flow range.

Contact Global PLC Spare HUB today to request pricing and confirm the product configuration for your application.

12-Month Comprehensive Warranty

Every part supplied by Global PLC Spare Hub is covered by a 12-month warranty from the date of invoice.

Coverage: Functional defects and hardware failures under normal operating conditions.
Commitment: We provide immediate repair, replacement, or a full refund for any verified defective components to minimize your operational downtime.

Returns & Exchange Policy

We offer a 30-day return policy to ensure you receive the exact part your system requires.

Eligibility: Returns are accepted for uninstalled items in their original, factory-sealed packaging.
RMA Process: Please contact our support team to obtain a Return Merchandise Authorization (RMA) number before shipping.
Fast Processing: Refunds or exchanges are processed within 3–5 business days after the returned item passes our technical inspection.

Need Technical Assistance?Not sure if this part is compatible with your system? [Consult our Engineers] before purchasing to ensure 100% compatibility.