Bently Nevada 330851-02-000-060-10-01-05 3300 XL 25 mm Proximity Probe

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Product Overview 

The Bently Nevada 330851-02-000-060-10-01-05 is a 3300 XL 25 mm Proximity Probe System, designed specifically for measuring differential expansion (DE) on medium to large steam turbine generators . Differential expansion refers to the difference in growth rates between the turbine rotor and the machine stator (casing) during startup, operation, and shutdown – a critical measurement for preventing internal rubbing and catastrophic machine damage . The system consists of three separate components: the 25 mm probe, an extension cable, and a 3300 XL 25 mm Proximitor sensor. This system features an M30 x 2 threaded probe case with a 25 mm probe tip, providing a linear range of 12.7 mm (500 mils) with a sensitivity of 0.787 V/mm (20 mV/mil) . This extended range makes it uniquely suited for measuring large displacement movements that standard 5 mm or 8 mm proximity probes cannot accommodate. The 25 mm probe system is designed for maximum survivability in the harshest steam turbine environments.

Key Features

➙M30 x 2 Threaded Probe Case–The large M30 x 2 thread provides robust mounting capability for heavy-duty industrial applications, ensuring the probe remains securely installed under high-vibration conditions .

➙Extended 12.7 mm Linear Range–Unlike standard 5 mm or 8 mm probes which offer only 2 mm of linear range, this 25 mm system provides 12.7 mm (500 mils) of linear measurement capability, specifically designed for differential expansion and large axial displacement monitoring .

➙High-Temperature Survivability–Continuous operation up to +200°C (+392°F) and intermittent tolerance up to +250°C (+482°F), making it suitable for the most demanding steam turbine applications where standard probes would fail .

➙Scaled Output Sensitivity–Provides 0.787 V/mm (20 mV/mil) output, which is proportionally scaled for large-range measurements compared to the standard 7.87 V/mm output of 5 mm/8 mm probes .

➙Stainless Steel Armor Protection–The 01 armor option includes a stainless steel protective sleeve over the cable, providing exceptional resistance to impact, abrasion, and crush damage in harsh turbine environments .

Technical Specifications

Probe Case Type: 02 - M30x2 thread

Unthreaded Length: 000 - 0mm

Overall Case Length: 060 - 60mm

Total Length: 10 - 1.0 metre (3.3 feet)

Armor: 01 - with SST Armor

Agency Approval: 05 - Multiple Approvals

inear Range: 12.7 mm (500 mils)

Sensitivity (Scale Factor): 0.787 V/mm (20 mV/mil)

Frequency Response: 0 to 2.5 kHz

Resolution: 1 μm (typical)

Applications

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1 Year Warranty

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       Email : sales6@askplc.com

     Whatsapp : +86 17359287459