The 24701-34-05-30-028-04-02 is a Bently Nevada 303 stainless steel probe housing assembly featuring a factory-integrated 3300 XL 8mm proximity probe with connector protector and multiple agency approvals. Engineered with a 3.0-inch standoff adapter and 2.8-inch probe penetration, this CSA-certified explosion-proof housing enables precise external mounting on thick-walled machinery casings where internal probe installation is impractical, delivering reliable shaft vibration and position monitoring in hazardous area environments.
Control&Communication
• Probe Compatibility: Designed for 3300 XL 8 mm probes with connector protector and approval options.
• Cable Length: 0.5 m (20 in) probe cable for flexible installation in confined spaces.
• Mounting Thread: 3/4-14 NPT standard for secure and reliable external mounting.
• Fittings: Includes one 3/4-14 NPT plug only for simplified conduit connections.
• Sleeve Specifications: Standoff adapter 3.0 in (76.2 mm) with 2.8 in (71.12 mm) probe penetration.
• Support Options: Additional sleeve support (37948-01) available for long sleeves through bearing housings.
Specific Application
- External shaft vibration and axial position monitoring on critical rotating machinery (e.g., large steam turbines, centrifugal compressors, multistage pumps) where internal probe mounting is not feasible.
- Installations requiring adjustable probe gap while the machine is in operation, enabled by the standoff adapter configuration.
- Hazardous area applications requiring CSA-certified explosion-proof enclosures (Class I, Divisions 1 & 2, Groups C and D).
- Machinery with thick casings or limited internal access where the 2.8-inch penetration depth provides optimal target proximity.
System Compatibility & Alternative Models
- System Compatibility:
The 24701-34-05-30-028-04-02 housing assembly is fully compatible with: - Bently Nevada 3300 XL 8mm proximity probes
- Bently Nevada 3300 XL Proximitor sensors (e.g., 330180)
- Bently Nevada 3300 XL extension cables
- Bently Nevada 3500 system monitoring modules
- Non-XL 3300 5mm and 8mm transducer systems (backward compatible)
Alternative Models & Differences:
|
Model |
Material |
Key Difference |
|
24701-34-05-30-028-04-02 |
303 stainless steel body, 304 stainless steel sleeve |
Standard stainless steel housing with 3.0″ standoff, 2.8″ penetration, 0.5m cable, one 3/4-14 NPT plug only |
|
21000-34-05-30-028-04-02 |
Aluminum body with 304 stainless steel sleeve |
Same configuration but aluminum body (lighter: 1.1 kg vs 1.8 kg); lower corrosion resistance |
|
24701-34-05-00-028-04-02 |
303 stainless steel body |
Same housing and probe but no standoff adapter (Option C = 00); reduced mounting flexibility |
|
24701-34-05-30-036-04-02 |
303 stainless steel body |
Same configuration but 3.6″ probe penetration (Option D = 036) vs 2.8″ |
|
CA24701-34-05-30-028-04-02 |
303 stainless steel body |
CSA explosion-proof certified version for North American end users only |
FAQ
Q1: What is the Bently Nevada 24701-34-05-30-028-04-02?
A1: It is a stainless steel probe housing assembly for 3300 XL 8 mm proximity probes with connector protector.
Q2: What are the key dimensions of this housing assembly?
A2: It features 0.5 m probe cable, 3.0 in standoff adapter, and 2.8 in probe penetration.
Q3: What mounting thread and fittings are included?
A3: It has 3/4-14 NPT mounting thread and includes one 3/4-14 NPT plug only.
Q4: What is the weight and shipping size of this assembly?
A4: It weighs 2.22 kg with estimated shipping dimensions of 38 x 7.8 x 7.8 cm.
Q5: What support is available for longer sleeve lengths?
A5: For sleeves over 304 mm, Bently Nevada offers probe support and oil seal (part 37948-01) and custom supports.
Accessories
| Part Number | Description |
| 37948-01 | Probe Support / Oil Seal Recommended for sleeves longer than 305 mm (12 in) |
Individual Probe Sleeve for 21000/24701 Proximity Probe Housings
44382-AAA
| A: Measured Probe Sleeve Length | |
|
Recommendation Order in increments of 0.1 in (3 mm) |
|
The individual probe sleeve length does not include the distance from the end of the sleeve to the probe tip or the gap from the probe tip to the target material. If only the part number of the original housing is known, and the sleeve cannot be measured, use the following table to determine the sleeve length:
| AAA | Description |
|
Standoff adapter option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 045 |
All housing AAA options except NSv and 11mm probes (options other than A:06, A:12, A:26, A:27, A:29, A:30, A:31, A:32, A:35, or A:36) |
|
Example Original part number 21000-16-10-15-035-03-02 AAA option for replacement sleeve (015 + 035 + 045) = 095 |
|
|
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 046 |
Housing AAA options for 3300 NSv probe options (A:26, A:27, A:31, or A:32 |
|
Example Original part number 24701-31-10-15-090-03-02 AAA option for replacement sleeve (015 + 090+ 046) = 151 |
|
|
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 037 |
Housing AAA options for 3300 XL 11mm probe options (A:29, A:30, A:35, or A:36) |
|
Example Original part number CA24701 -36-10-40-053- 02-02 AAA option for replacement sleeve (040 + 053+ 037) = 130 |
|
|
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 039 |
Housing AAA options for 7200 Series 11mm probe options (A:06 or A:12) |
|
Example Original part number CA24701 -12-10-30-113-01 - 02 AAA option for replacement sleeve (030 + 113+ 039) = 182 |
|
| Minimum Probe Sleeve Length | |
| For all probes except NSv and 11mm probes | 5.5 in (140 mm) = 055 |
| 3300 XL NSv probe | 5.5 in (142 mm) = 056 |
| 3300 XL 11mm probe | 4.7 in (119 mm) = 047 |
| Maximum Probe Sleeve Length | |
| All 0.5 meter probes except NSv and 11mm probes | 18.0 in (457 mm) = 180 |
| 3300 XL NSv 0.5 meter probe | 18.1 in (460 mm) = 181 |
| 7200-series 0.5 meter 11mm probe | 15.4 in (391 mm) = 154 |
| All 1.0 meter probes except NSv and 11mm probes | 33.7 in (856 mm) = 337 |
| 3300 XL NSv 1.0 meter probe | 33.8 in (859 mm) = 338 |
| 3300 XL 1.0 meter 11mm probe | 32.9 in (836 mm) = 329 |
| 7200 Series 1.0 meter 11mm probe | 33.1 in (841 mm) = 331 |
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