Bently Nevada 330192-00-28-05-00 Short Probe

Bently Nevada 330192-00-28-05-00 Compact Short Case 3300 XL ETR Probe

• Manufacturer & Model: Bently Nevada 330192-00-28-05-00 ETR probe for 3300 XL series.
• Product Type: 8 mm Eddy Current Transducer with stainless steel armor.
• Thread: 3/8-24 UNF.
• Made in: U.S.A.

Smallest in the 330192 Family

• Case length: Only 2.8 inches (71.1 mm).
• Cable length: Shortest available at 0.5 meter (1.6 feet).
• Unthreaded section: Zero - threads start at shoulder.
• Total weight: Lightest among armored 8mm probes.
• Target market: Compact machinery with limited space.
• Alternative to: Bulkier 3.0in, 6.0in, or 8.0in case probes.

Where This Probe Excels

• Tight bearing housings: Small pumps and fans.
• Thin wall casings: 1.5 to 2.5 inches thick.
• Retrofit projects: Replaces older shorter probes.
• Limited access areas: Wrench swing restricted.
• Portable monitoring: Temporary installation on test stands.
• OEM equipment: Built into new compact machines.

Case Length vs Wall Thickness Guide

• 2.8in case works for: Walls up to 2.0 inches thick.
• Thread engagement needed: Minimum 0.5 inches.
• Remaining length: 0.8 inches for tip extension past wall.
• Gap setting: 1.5mm (0.06in) from tip to shaft.
• Safety margin: Tip will not hit shaft if wall is 2.0in or less.
• Do not use on: Walls thicker than 2.2 inches.

Electrical Characteristic at 0.5 Meter

• RPROBE: 7.45 ± 0.50 Ω.
• Compare to 1.0m probe: 7.59 Ω (0.14 Ω difference).
• Compare to 9.0m probe: 9.87 Ω (2.42 Ω difference).
• Short cable advantage: Lowest possible resistance.
• Signal strength: Minimal attenuation over short distance.
• Noise pickup: Less susceptible than long cables.

Zero Unthreaded Section Explained

• What it means: No smooth metal at the tip before threads start.
• Visual: Threads continue all the way to the probe tip.
• Why choose this: Maximizes thread length on short case.
• Trade-off: Cannot use copper crush washer at shoulder.
• Sealing method: Thread sealant (PTFE tape or pipe dope).
• Rule check: 2.8in case - 0in unthreaded = 2.8in difference. Required is 0.8in. Pass.

Armor on Short Cable

• Armor type: AISI 302 stainless steel braid.
• Coverage: Full 0.5 meter length.
• Connector to probe: Armor terminates at both ends.
• Short cable benefit: Easier to route in crowded junction boxes.
• Bend radius: 50mm minimum (tighter than long cables).
• Conduit size: 3/4 inch sufficient for this short cable.

Pressure Seal Reality Check

• Viton O-ring: Located inside probe tip assembly.
• Seals against: Differential pressure across mounting.
• No factory test: Standard units ship untested.
• Short probe note: Same seal as longer probes.
• Low pressure OK: Fine for most industrial applications under 500 psi.
• High pressure need: Request custom pressure test service.

Temperature Limits at a Glance

• Minimum continuous: -52°C (-62°F).
• Maximum continuous: +177°C (+350°F).
• Seal warning: Below -34°C, Viton may crack.
• Short term exposure: Tip can reach +218°C (+425°F).
• Cable limit: +260°C (+500°F) for extended range version.
• Standard version: Suits 95% of industrial machinery.

Temperature Class Selection Table

• Gas zone T1: Max surface 232°C, ambient -55 to +232°C.
• Gas zone T2: Max surface 177°C, ambient -55 to +177°C.
• Gas zone T3: Max surface 120°C, ambient -55 to +120°C.
• Gas zone T4: Max surface 80°C, ambient -55 to +80°C.
• Gas zone T5: Max surface 40°C, ambient -55 to +40°C.
• Dust zone: Surface limits from 280°C down to 90°C depending on ambient.

Installation Notes for Short Probe

• Wrench size: 7/8 inch open end.
• Torque: 15-20 Nm (11-15 lb-ft).
• Gap setting: 1.5mm (60 mils) from shaft.
• Method: Touch shaft, back off 1.5 turns.
• Lock nut: Tighten against mounting surface.
• Access tip: Short probe fits where wrench swing is limited.

Compatibility Check

• Proximitor: 3300 XL 8mm (330180-90-00) required.
• Extension cables: Use 3300 XL series only.
• Maximum total length: Probe + extension = proximitor rating.
• Example: 0.5m probe + 4.5m extension = 5.0m system.
• Connector: Standard 3300 XL coaxial.
• Target: Calibrated for AISI 4140 steel.

Included in Package

• Probe: 330192-00-28-05-00 with attached 0.5m armored cable.
• Lock nut: 3/8-24 UNF hex nut.
• Calibration certificate: Individual sensitivity data.
• Instruction sheet: Short form installation guide.
• Protector cap: For connector storage.

Shipping Details

• Weight: 0.3 kg (0.66 lb).
• Packaging: Small cardboard tube.
• Tube size: 30 x 30 x 200 mm.
• Shipping carriers: FedEx, UPS, DHL.
• Delivery: 2-5 business days worldwide.

Frequently Asked Questions

• Q: What is the maximum wall thickness for this 2.8 inch probe?
  A: Safe maximum is 2.0 inches (50mm). Calculation: 2.8in case minus 0.5in minimum thread engagement minus 0.06in gap minus 0.24in safety margin = 2.0in maximum wall. Thicker walls risk the tip not reaching the shaft.
• Q: Why would I choose 0.5 meter cable over longer options?
  A: Short cable keeps resistance low and signal strong. It also reduces cost and weight. Use 0.5m when your proximitor mounts very close to the probe, such as on the same machine skid or inside a local junction box.
• Q: Can I add extension cable to reach 5.0 meters total?
  A: Yes. Add a 4.5 meter 3300 XL extension cable. The system total becomes 0.5m + 4.5m = 5.0m. Verify your proximitor label shows 5.0m calibration. Do not exceed the printed length.
• Q: Is zero unthreaded length a problem for sealing?
  A: Not if you use proper thread sealant. Without a smooth unthreaded section, you cannot use a copper crush washer. Apply PTFE tape (3 to 5 wraps) or anaerobic pipe sealant to the threads. The sealant prevents leakage through thread paths.
• Q: What tools do I need to install this short probe?
  A: You need a 7/8 inch open-end wrench for the hex flats. A 3/8-24 UNF tap to clean mounting threads. A gap setting tool or feeler gauge. No special tools required - standard mechanic's tools work.