S6040A1003 HONEYWELL

The S6040A1003 belongs to the S6040 series of flow monitor switches. It functions by using a flexible paddle (sensing element) that is inserted into the air stream. When the air flow reaches a specific velocity, the force on the paddle triggers an internal high-capacity micro-switch. This switch can then signal a controller, start a fan, or shut down a heater if flow is lost. The unit is housed in a durable ABS base with a transparent polycarbonate cover, allowing for easy visual inspection of the internal mechanism and setpoint.

Product Specifications

• Flow Medium: Air and non-aggressive gases.

• Switch Type: SPDT (Single Pole Double Throw) micro-switch.

• Switching Capacity: 15 (8) A at 24 to 250 Vac.

• Operating Life: Minimum 50,000 cycles at nominal load.

• Setpoint Range: Adjustable from 2.5 m/s to 9.2 m/s.

• Reset Point: Approximately 1.0 m/s at minimum setting and 8.0 m/s at maximum setting.

• Max Media Temperature: 85°C (185°F).

• Working Temperature: -40°C to +85°C at 90% relative humidity (non-condensing).

• Maximum Pressure: 0.25 bar.

• Protection Class: IP65 according to EN60529 (Dust-tight and protected against water jets).

• Electrical Connection: Screw terminals for wires up to 1.5 mm².

• Materials: Yellow brass lever, zinc-plated steel sensor body, and 1.4310 stainless steel paddle.

Product Advantages

• High Reliability: The fully encapsulated micro-switch is protected against environmental factors, ensuring a long service life of over 50,000 cycles.

• Adjustable Sensitivity: Users can fine-tune the switch-point using an internal adjustment screw to match the specific flow requirements of the duct.

• Durable Construction: With an IP65 rating and corrosion-protected steel components, the device is suitable for demanding industrial and commercial HVAC environments.

• Easy Installation: The design allows for vertical mounting through a standard 20-mm hole in the duct, and the paddle can be easily trimmed or adjusted for different duct sizes.

• Cost-Effective: It provides a mechanical, power-free sensing solution that is more affordable than electronic mass flow sensors for simple "flow/no-flow" detection.

Important Considerations (Precautions)

• Mounting Position: The S6040A1003 must be mounted in a vertical position with the switch housing at the top to ensure gravitational reset and proper paddle movement.

• Turbulence Avoidance: To prevent paddle instability and false switching, install the device in a straight run of duct. There should be a straight section at least five times the duct diameter both upstream and downstream from the switch.

• High Velocity Warning: For air speeds exceeding 5 m/s, the paddle must be narrowed by cutting along the factory markings to prevent mechanical breakage. This modification will increase the minimum switch point to 2.5 m/s.

• Electrical Safety: Ensure all power is disconnected before wiring the screw terminals to prevent electrical shock. Always follow local electrical codes for Class I equipment.

• Maintenance: Periodically check the paddle for dust accumulation or debris, which could weight the paddle down and affect the accuracy of the trip point.

Product Applications

• HVAC Systems: Monitoring for fan failure or blocked filters in air handling units (AHUs).

• Heater Protection: Interlocking with electric duct heaters to ensure they only operate when there is sufficient airflow to dissipate heat.

• Exhaust Ventilation: Verifying the operation of exhaust fans in commercial kitchens or laboratory fume hoods.

• Air Treatment: Monitoring flow in filtration systems and cleanroom air supply ducts.

• Industrial Cooling: Ensuring air flow is present for cooling large electrical cabinets or industrial machinery.