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The 3300 XL 8mm Proximity Probe is the most widely installed eddy-current probe for shaft vibration, axial position, and differential expansion measurement in API 670 turbomachinery applications. The XL series extends the standard 3300 probe with 50% longer linear range and improved environmental resistance.
Each probe is supplied with a calibrated stainless-steel armored extension cable terminated with a twist-lock connector. Probes are available in standard (177°C), high-temperature (220°C), and cryogenic variants.
| Probe diameter | 8 mm |
| Linear range | 0.5 to 4.0 mm (80 mils) |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Temperature range | -55°C to +177°C standard |
| Cable lengths | 1m / 2m / 3m / 4m / 5m / 7m / 9m |
| Connector | Twist-lock, gold-plated |
| Pressure rating | Up to 70 bar standard |
