UL 921 Figure 2 PA130B Probe for Uninsulated Live Parts

This UL 921:2016 Figure 2 Probe for Uninsulated Live Parts is a specialized safety tool designed for scientific, laboratory, and precision measurement equipment. It features a highly conductive brass probe tip to detect accessible uninsulated live components—critical for verifying that energized parts (e.g., internal wiring, terminal blocks) remain out of user reach. Paired with a robust insulating nylon handle (to protect testers from electric shock), it applies light, controlled pressure to mimic accidental contact. 

Specifications:
Probe Type: UL 921:2016 Figure 2 Probe (for uninsulated live part accessibility testing in scientific equipment)
Handle Material: Nylon (fully insulating, heat-resistant up to 100°C; non-slip grip for precise operation)

Key Dimensions:
– Straight Finger Diameter: 12.7mm (1/2 inch)
– Straight Finger Total Length: 101.6mm (4 inch)
– The Head Length: 14.3mm (9/16 inch)
– The Head Radius: R 4.8mm (3/16 inch)
– The Tail Diameter: 19.1mm (3/4 inch)

Test Procedures:
1. Inspect the probe (no bent brass tip, cracked handle, or poor conductivity) and connect it to a live part detection tool.
2. Power on the scientific equipment and let it reach normal operating mode (e.g., calibration, measurement state).
3. Hold the insulating handle and align the probe tip with potential access points (e.g., terminal gaps, vent slits).
4. Gently apply light contact to the target area—do not use force.
5. Check the detection tool for signals (indicating contact with uninsulated live parts).
6. Record results: pass if no live part contact, fail if contact is detected.

Applications:
1. Safety testing of laboratory centrifuges and spectrometers (per UL 921:2016 Figure 2) to block live part access.
2. Verification of non-patient-contact medical lab equipment (e.g., sample preparers) for U.S. market safety.
3. Quality control for precision scientific scales and balances during manufacturing.
4. Post-production audits of laboratory power supplies and signal generators to meet UL 921 standards.

Uninsulated Live Part with standard UL 921 Figure 2 Probe