Overview

The document details the specifications, features, installation methods, model designations, safety instructions, and operational guidelines for the Small Flow Sensor FUS8 series, designed primarily for suction lift verification in pneumatic systems.

Product Characteristics

• Ultra-small and lightweight sensor (8.5mm width, 24mm height, 41mm length, 10.7g with ø4mm push-in fitting).
• Multiple connection methods available: push-in fitting, barb fitting, stem type, and female thread model.
• Three installation methods: direct screw mounting, holder mounting, and sensor head direct mount for minimal space installation.
• Non-linear type sensor optimized for suction lift verification, including bidirectional flow measurement for suction lift and release verification.
• Suitable for detecting flow rate gaps where pressure sensors are less effective, especially in long piping or narrow vacuum flow conditions.

Model Designation and Options

The model code structure includes:

• Sensor type: FUS8 (non-linear flow sensor)
• Output type: Analog (1V to 5V)
• Flow direction: One-directional (F) or Bi-directional (R)
• Flow rate range: 0.5, 1, 5, or 10 l/min full scale
• Port sizes selectable for inside and outside ports (ø1.8mm to ø6×ø4mm)
• Cable options: with or without 3-core 3m cable
• Holder options: with or without holder (not selectable with sensor head unit)

Specifications

Installation and Connection

• Connection methods include push-in fitting (sizes ø1.8 to ø4mm), barb fitting (ø6×ø4mm), stem type (ø4, ø6mm), and female thread (M5×0.8).
• Installation methods: direct screw mounting, holder mounting, and sensor head direct mount for minimal space.
• Bidirectional flow sensors output 3V at zero flow; output varies up to 5V depending on flow direction.

Safety and Usage Instructions

• Do not use in flammable or corrosive gas environments; explosion or fire risk.
• Power must be off during wiring; use insulated, stabilized DC power supply to avoid electric shock or damage.
• Use only for industrial purposes, not for commercial measurement.
• Install air filters upstream to prevent foreign material suction.
• Avoid dew condensation inside piping by controlling ambient and fluid temperatures.
• Prevent bending near tube fittings; use insert rings if necessary.
• Avoid excessive vibration or shock (>100 m/s²) to prevent output fluctuation or sensor detachment.
• Keep sensor and wiring away from strong electrical noise sources.
• Protect against counter-currents and surge currents to avoid damage.
• Do not apply repetitive bending or tensile force on lead wires.
• Avoid external mechanical stress on the sensor body or connectors during operation.
• Operating temperature range: 0°C to 50°C; avoid sudden temperature changes causing condensation.
• Do not operate outside specified pressure or flow ranges to prevent malfunction.
• Use only with clean, dry air or nitrogen free of chlorine, sulfur, acids, dust, and oil mist.
• Install filters, air dryers, and oil mist filters on the primary side to protect sensor internals.
• Use oil-free valves and filters to prevent abrasion powder contamination.
• Allow at least 5 minutes of standby time after energizing before use for output stability.
• Perform periodic maintenance at least annually; expect output variation up to ±6% F.S. (one-directional) or ±3% F.S. (bi-directional) over time.
• Do not dismantle or modify the product.
• Clean sensor case with care; avoid solvents, alcohol, or detergents that may damage resin.

Applications

• Verification of suction lift for small workpieces where pressure sensors are ineffective.
• Long piping systems where pressure difference detection is difficult.
• Vacuum flow narrowing scenarios requiring longer tact time for suction verification.
• Bidirectional flow measurement for suction transport applications.

Packaging and Accessories

• Products are supplied individually packaged in bags.
• Various cable and holder options are available as accessories.
• Product line includes ECO-friendly options.