Name: 330192-00-20-90-CN Bently Nevada 3300 XL 8 mm ETR Armored Probe
SKU: 330192-00-20-90-CN
Availability: InStock

Product details

330192-00-20-90-CN – Bently Nevada 3300 XL 8 mm ETR Probe (Armored)

Product Overview

Bently Nevada 3300 XL series – reliable 8 mm eddy current probe
- Model: 330192-00-20-90-CN
- Thread: 3/8-24 UNF with integral armor
- Case length: 2.0 in | Unthreaded: 0.0 in
- Total length: 9.0 meters (29.5 feet)
- Made in U.S.A

Technical Specifications

Brand & Model
- Manufacturer: Bently Nevada
- Product No.: 330192-00-20-90-CN
- Series: 3300 XL 8 mm ETR Probe
Measurement & Performance
- Measurement Range: 2 mm (80 mils) linear range
- Frequency Response: DC to 10 kHz
- Sensitivity: 7.87 V/mm (200 mV/mil) with 3300 XL proximitor
- Linearity: ±0.25% of full scale
- Resolution: Infinite (analog eddy current)
Environmental & Durability
- Operating Temperature: -52°C to +177°C (-62°F to +350°F)
- Storage Temperature: Same as operating range
- Humidity: 93% RH for 56 days, < 3% drift
- Pressure Seal: Viton® O-ring for differential pressure
- Note: Below -34°C may affect pressure seal life
Mechanical Construction
- Thread: 3/8-24 UNF
  - Max thread engagement: 0.563 in
- Case Length Option: 20 = 2.0 in
- Unthreaded Length Option: 00 = 0.0 in
  - Rule: Unthreaded length must be 0.8 in less than case length
- Total Length Option: 90 = 9.0 meters (29.5 feet)
- Agency Approval: CN = Country Specific
- Tip Material: Polyphenylene sulfide (PPS)
- Case Material: AISI 303/304 Stainless Steel
- Cable: Armored construction
Electrical Characteristics
- DC Resistance (RPROBE): 9.87 ±0.50 Ω
  - Measured from center conductor to outer conductor
Compatibility
- Proximitor: 3300 XL 8 mm series (330180, 330181, 330182)
- Extension Cables:
  - 330190-085-00-CN
  - 330190-085-00-05
- Alternative: 3300 5mm Proximity Probes for smaller targets
Certifications & Approvals
- Intrinsically Safe (ia)
  - Class I, Zone 0: AEx/Ex ia IIC T5…T1 Ga
  - Class I, II, III Div 1, Groups A, B, C, D, E, F, G
- Nonincendive (nA/ec)
  - Class I, Zone 2: AEx/Ex nA IIC T5…T1 Gc
  - Class I, Div 2, Groups A, B, C, D
- Temperature Schedule (EPL Ga/Gc)
  - T1: -55°C to +232°C
  - T2: -55°C to +177°C
  - T3: -55°C to +120°C
  - T4: -55°C to +80°C
  - T5: -55°C to +40°C

Installation Guidance

Thread Engagement
- Maximum: 0.563 in for 3/8-24 UNF
- Do not over-torque beyond 8.5 N·m (75 in-lb)
Unthreaded Length Rule
- Must be at least 0.8 in less than case length
- Current: Case 2.0 in – unthreaded 0.0 in – compliant
Gap Setting
- Initial air gap: -0.25 mm to -0.51 mm
- Verify with 3300 XL proximitor for optimal linear range
Cable Routing
- Maintain minimum bend radius: 50 mm
- Avoid sharp edges that may damage armor

Commissioning & Maintenance

Commissioning
- Plug-and-play with 3300 XL proximitors
- No field calibration required
- Quick DC resistance check validates integrity
Maintenance
- Clean probe tip with isopropyl alcohol
- Avoid scratching PPS face
- Typical service life: >5 years under normal operation

Package & Shipping

Package Contents
- 1 x 330192-00-20-90-CN probe with armored cable
- Installation datasheet
- Factory calibration certificate
Warranty
- 12 months against manufacturing defects
Shipping
- Dispatch: 12-24 hours after order confirmation
- Carriers: FedEx, UPS, DHL – global express tracking

Expert Review – Manager’s Insight

“Industry standard for turbomachinery monitoring”
- Ultra-stable output with minimal thermal drift
- Armored cable withstands oil, vibration, and abrasion
Hazardous area ready
- ia and nA approvals cover Zone 0, Zone 2, and Div 1/2 installations
- Suitable for refineries, chemical plants, offshore platforms
Field-proven advantage
- 8 mm format reduces installation sensitivity vs 5 mm probes
- Ideal for axial thrust monitoring and overspeed protection

Applications

Rotating Machinery
- Steam turbines, gas turbines, compressors
- Generators, motors, pumps
Monitoring Functions
- Shaft vibration and position
- Axial thrust monitoring
- Keyphasor® reference for speed/phase
Industries
- Oil & gas, power generation, petrochemical
- Steel mills, paper mills, heavy industrial

Frequently Asked Questions

Can I use this probe with a 5 mm proximitor system?
- No. Use only 3300 XL 8 mm proximitors. 5 mm systems have different scale factor and linear range.
What does the suffix “-CN” mean?
- CN indicates Country Specific agency approval. It meets local hazardous area certification requirements.
How do I verify probe health before installation?
- Measure DC resistance between center and outer conductors. Expected value: 9.87 ±0.50 Ω at room temperature.
Can I cut the armored cable to a shorter length?
- Not recommended. Cutting alters system calibration and impedance. Order custom length from factory.
What extension cable works best?
- Use 330190-085-00-CN or 330190-085-00-05 for optimal system performance.
Does this probe work in high humidity?
- Yes. Certified for 93% RH for 56 days with less than 3% scale factor drift.
What is the difference between 8 mm and 5 mm probes?
- 8 mm offers wider linear range (2 mm) and larger standoff distance. Ideal for axial thrust and large shafts. 5 mm probes suit smaller target areas.

Selection Guidance – 8 mm vs 5 mm Comparison

Choose 8 mm (this model) when:
- Wider linear range (2 mm) is needed
- Larger standoff distance required
- Axial thrust monitoring on large rotating equipment
- Higher tolerance to mechanical runout
Consider 5 mm probes when:
- Target area is limited or restricted
- Tighter installation space requires smaller probe tip
- Compare with 3300 5mm Proximity Probes series
Extension cable recommendation:
- For 9.0 m total length, integrated cable is sufficient
- Use extension cables when longer reach is needed
Hazardous area selection:
- Verify temperature class matches your zone requirements (refer to temperature schedule above)