Overview

The document details the specifications, features, installation methods, model designations, safety instructions, and operating conditions 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 sensor type optimized for suction lift verification, including bidirectional flow measurement for suction lift and release verification.
• Best suited for detecting suction lift of small workpieces and applications where pressure sensors are ineffective due to long piping or narrow vacuum flow.

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

Note: Bi-directional type outputs 3V at zero flow; output varies from 1V to 5V depending on flow direction.

Installation and Connection Methods

• Direct screw mounting for fixed installation.
• Holder mounting for easy installation and removal.
• Sensor head direct mount for minimal space requirements.
• Connection options include push-in fittings (ø1.8 to ø4mm), barb fittings (ø6×ø4mm), stem types (ø4, ø6mm), and female thread (M5×0.8).

Applications

• Suction lift verification of small workpieces difficult to detect by pressure sensors.
• Verification in long piping systems where pressure detection is challenging.
• Applications requiring narrow vacuum flow to secure pressure difference and longer tact time for suction lift verification.

Safety and Usage Instructions

• Do not use in flammable or corrosive gas environments.
• Power must be off during wiring; use insulated, stabilized DC power supply within rated voltage.
• 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 and connectors during operation.
• Operating temperature range: 0°C to 50°C; avoid sudden temperature changes causing condensation.
• Do not operate outside specified pressure and flow ranges to prevent malfunction.
• Use only with clean, dry air or nitrogen free of chlorine, sulfur, acid, 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 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.

Model and Accessory Codes

Examples of model codes are provided for various flow ranges, flow directions, cable options, and holder presence. Accessories include holders and cables with specific codes.

Packaging

Each sensor is packaged individually in a bag.

Summary

The FUS8 series small flow sensors provide precise, compact, and versatile solutions for suction lift verification in pneumatic systems, especially where pressure sensors are inadequate. Multiple installation and connection options, combined with detailed safety and usage guidelines, ensure reliable operation in industrial environments.