UL 507 Figure 8.2 S2104A Test Probe for Fan Impellers and Other Moving Parts

This UL 507 Figure 8.2 compliant test probe is engineered for safety verification of electric fans, blowers, and air-moving appliances, specifically designed to assess accessibility to hazardous live parts (e.g., motor wiring, internal switches) and moving components (e.g., fan blades). The probe features a rigid stainless steel construction for consistent insertion testing and an insulating nylon handle for safe, non-slip operation during compliance verification. Engineered to apply a precise 10N thrust force simulating accidental user contact, this tool strictly adheres to UL 507 safety requirements for electrical appliance testing.

Specifications

• Probe Type: UL 507 Test Probe (for electric fans, blowers, and air-moving appliances)
• Probe Material: Stainless steel (rigid, corrosion-resistant; maintains structural integrity under 10N thrust force)
• Handle Material: Nylon (fully insulating, heat-resistant up to 100°C; non-slip grip for controlled operation)
• Key Dimensions:
  • Straight Finger Diameter: 25.4 mm (1 inch)
  • Straight Finger Total Length: 101.6 mm (4 inches)
  • Head Radius: R12.7 mm (1/42 inch)
  • Tail Diameter: 31.75 mm (1-1/4 inches)

Test Procedures

1. Inspect the probe for physical damage (e.g., bent stainless steel body, cracked nylon handle) to ensure measurement accuracy.
2. Power on the electric fan/blower and activate its normal operating mode (e.g., high/low speed settings).
3. Hold the insulating handle and align the probe tip with appliance openings (e.g., grill gaps, control slots).
4. Apply steady 10N thrust force to the probe toward internal components—maintain force application for 5 seconds.
5. Verify whether the probe contacts any hazardous parts (e.g., exposed wiring, rotating blades).
6. Document test results indicating whether the appliance meets UL 507 safety requirements (pass/fail status).

Applications

1. Safety testing of household table fans and pedestal fans (per UL 507:2023 Figure 8.4) to verify probe access prevention to motor wiring.
2. Compliance verification of ceiling fans (indoor/outdoor models) to ensure rotating blades remain inaccessible during operation.
3. Quality control testing for bathroom/kitchen exhaust fans during manufacturing processes for U.S. retail market compliance.
4. Post-production audits of portable fans and air circulators to validate safety barrier effectiveness against user contact.