IEC 61032 Unjointed Test Finger Test Probe 11

This IEC 61032:2021 Figure 7 Unjointed Test Finger (Test Probe 11) is a rigid, cable-free tool designed to simulate human finger contact—critical for verifying if electrical equipment blocks access to hazardous live parts. Crafted from stainless steel (chrome-plated for durability) with a polyamide insulating handle, it meets global safety standards like IEC 60335 and UL. Its unjointed design ensures consistent testing of enclosure gaps and internal barriers, making it ideal for manufacturers, labs, and certifiers validating safety in household, commercial, and industrial electrical devices. A cabled version is available for low-voltage testing, but this model focuses on basic accessibility checks.

Standard:

Specifications:
Probe Design: Unjointed rigid finger (mimics human finger shape for realistic accessibility testing; no articulation for consistent force application)
Material Composition – Probe Body: High-grade stainless steel (resists corrosion and wear); – Handle: Polyamide (insulating, flame-retardant UL94 V-0 rating for user safety)
Surface Finish: Chrome plating (enhances scratch resistance and extends service life; ensures smooth contact with equipment enclosures)
Key Dimensions – Probe Diameter: ø12mm (±0.05mm tolerance); – Baffle Plate Diameter: ø50mm (prevents over-insertion); – Overall Length (Probe + Handle): 80mm (±0.2mm tolerance); – Tip Clearance: 5±0.5mm (aligns with IEC 61032 Figure 7)
Cable:  Configuration Cable-free (base model); Compatible with cabled variant (for low-voltage testing with supplies like LISUN SMT-529CV)
Dimensional Tolerances:  Linear dimensions ≤25mm: ±0.1mm; >25mm: ±0.2mm; Diameters: ±0.05mm (meets standard precision requirements)

Test Procedures:
1. Inspect the probe for bent stainless steel, cracked handles, or worn chrome plating; confirm dimensions match specs.
2. Power off the electrical equipment under test and secure it on a flat, stable surface.
3. Identify target access points (e.g., enclosure vents, control panel gaps, connector openings).
4. Hold the polyamide handle, align the rigid probe tip with the target gap, and gently insert until resistance is felt.
5. Check if the probe can reach hazardous live parts (via visual inspection or pairing with a separate continuity tester if needed).
6. Record results (pass/fail) to verify compliance with applicable safety standards.

Applications:
1. Accessibility testing of hazardous parts in household appliances (e.g., refrigerators, electric stoves) per IEC 60335-1:2020 Clause 8.1.
2. IP Code enclosure verification (e.g., checking dust/water protection gaps in TV casings) following IEC 60529:2021 Clause 5.2.
3. Safety checks for low-voltage industrial control panels (e.g., factory machine interfaces) to meet IRAM 4220-1:2022 Clause 6.4.
4. Pre-certification testing for small kitchen appliances (e.g., blenders, coffee makers) seeking UL approval, per UL 60335-1:2024.
5. Mechanical stability checks of equipment openings (e.g., audio speaker grilles) using IEC 61032:2021 Test Probe 11.

IEC 61032 Unjointed Test Finger Test Probe 11