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

This UL 507 Test Probe is a specialized safety tool engineered for electric fans, blowers, and air-moving appliances—focused on verifying that hazardous live parts (e.g., motor wiring, internal switches) and moving components (e.g., fan blades) remain inaccessible to users. It features a rigid stainless steel probe body for consistent insertion testing and an insulating nylon handle for safe, non-slip operation. Designed to apply a precise 10N thrust (mimicking accidental user contact), it strictly aligns with UL 507’s safety requirements. 

Specifications:
Probe Type: UL 507 Test Probe (for electric fans, blowers, and air-moving appliances)
Probe Material: Stainless steel (rigid, corrosion-resistant; maintains shape under 10N thrust)
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 inch)
– Head Radius: R12.7 mm(1/42 inch)
– Tail Diameter: 31.75 mm(1-1/4 inch)

Test Procedures:
1. Inspect the probe for damage (e.g., bent stainless steel body, cracked nylon handle) to ensure accuracy.
2. Power on the electric fan/blower and activate its normal operating mode (e.g., high/low speed).
3. Hold the insulating handle and align the probe tip with appliance openings (e.g., grill gaps, control slots).
4. Apply steady 10N thrust to the probe toward internal components—maintain force for 5 seconds.
5. Check if the probe touches any hazardous parts (e.g., exposed wiring, rotating blades).
6. Record whether the appliance meets safety requirements (pass/fail).

Applications:
1. Safety testing of household table fans and pedestal fans (per UL 507:2023 Figure 8.4) to block probe access to motor wiring.
2. Verification of ceiling fans (indoor/outdoor) to ensure rotating blades remain inaccessible.
3. Quality control for bathroom/kitchen exhaust fans during manufacturing for U.S. retail markets.
4. Post-production audits of portable tower fans to meet UL 507 and UL 60335-1 safety standards.

UL Test Probe of UL507