The 31000-28-05-00-061-01-02 proximity probe housing assembly is a Bently Nevada externally mounted sensor enclosure featuring a high-strength polyphenylene sulfide body. Fully compliant with API 670 standards, this unit works seamlessly with 3300 XL proximity transducer systems to deliver robust environmental protection and stable radial vibration or Keyphasor telemetry in intrinsically safe hazardous areas.
Features and benefits
Designed for radial probe mounting – Ideal for vibration and Keyphasor measurement applications.
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External probe access – Allows easy gap adjustment and probe replacement without machine disassembly.
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High-strength PPS housing – Provides excellent corrosion resistance and durability.
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Stainless steel components – Enhance reliability in harsh industrial environments.
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Flexible configuration – Can be ordered with installed 3300 XL proximity probes and conduit fittings.
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API 670 compliant – Suitable for intrinsically safe hazardous area installations when used with approved systems.
Specific Application
- External access mounting for radial vibration and Keyphasor phase measurements through machine casings without machinery disassembly.
- Proximity probe protection in highly corrosive process zones utilizing a lightweight, advanced thermoplastic housing structure.
- Sensor installations on industrial rotating machinery where NEMA 4X and IP66 hose-directed water sealing metrics are strictly required.
System Compatibility and Alternative Models
- System Compatibility: Supplied with an integrated 3300 XL 8mm proximity probe with multiple approvals. It is fully compatible with Bently Nevada 3300 XL Proximitor Sensors, 3300 XL Extension Cables, and multi-channel machinery protection monitors like the Bently Nevada 3500 system.
- Alternative Model: CA21000 or CA24701 Explosion-Proof Proximity Probe Housing Assemblies.
- Key Differences:
- Housing Material: The 31000 model is made of a glass-reinforced polyphenylene sulfide (PPS) thermoplastic with conductive fibers, whereas the CA24701 model uses a rugged heavy-duty stainless steel casing.
- Protection Method: The 31000 housing provides mechanical, environmental, and intrinsically safe protection only, while the CA21000 and CA24701 variants are specifically certified as explosion-proof enclosures.
Ordering Information Summary
English Proximity Probe Housing Assemblies Matrix
31000-28-05-00-061-01-02: Base assembly designation for English dimensioned externally mounted PPS probe housings.
Detailed Suffix Option Breakdown
A: 28: Integrated 3300 XL 8mm proximity probe with multiple hazardous area approvals.
B: 05: Integrated probe leading cable length specified at 0.5 meters (20 inches).
C: 00: No standoff adapter configuration selected.
D: 061: Probe penetration sleeve length dimension machined to 6.1 inches.
E: 01: Base package includes one 3/4-14 NPT conduit fitting and two blanking hole plugs.
F: 02: Machine case mounting sleeve threads engineered to a 3/4-14 NPT specification.
FAQ
Q1: What is the main function of the 31000-28-05-00-061-01-02?
A1: It is designed to mount proximity probes through the machine casing for vibration or Keyphasor monitoring.
Q2: What material is used in the 31000-28-05-00-061-01-02?
A2: The housing is made of polyphenylene sulfide (PPS) with corrosion-resistant stainless steel components.
Q3: Can the 31000-28-05-00-061-01-02 allow probe maintenance without machine disassembly?
A3: Yes, it provides external access for probe gap adjustment and replacement.
Q4: Is the 31000-28-05-00-061-01-02 compliant with industry standards?
A4: Yes, it fully complies with the API 670 standard for externally mounted probe housings.
Q5: Can the 31000-28-05-00-061-01-02 be used in hazardous areas?
A5: Yes, when used with approved transducer systems and I.S. barriers, it can support intrinsically safe applications.
Accessories
| Part Number | Description |
| 37948-01 | Probe Support / Oil Seal Recommended for sleeves longer than 305 mm (12 in) |
| 124200 | 31000 and 32000 User Guide |





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