The Bently Nevada 24701 proximity probe housing assembly provides superior corrosion resistance for demanding industrial applications. This housing system safely encloses the sensing element while maintaining precise gap measurements in aggressive environments. Manufactured from 303 stainless steel with a 304 stainless steel sleeve, this model withstands chemical exposure and high humidity. It complies fully with the American Petroleum Institute's API 670 standard for externally mounted housings. Users in offshore, chemical, and marine industries particularly favor this rugged design. The full model 24701-28-10-00-110-03-02 arrives completely assembled and factory-calibrated for immediate installation.
This housing assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal. Unlike aluminum versions, the 303 stainless steel body offers enhanced protection against corrosive substances and mechanical impacts.
Probe and Cable Details
The unit integrates a 3300 XL 8 mm probe with selectable hazardous area approvals. Cable length measures 1.0 m (39 in) , providing extended reach for remote monitoring installations. With this cable length, the maximum (C)+(D) dimension reaches 29.2 in (74.2 mm) when the probe serial number remains visible. For applications requiring visible labeling, the dimension measures 17.0 in (43.18 mm) .
Mounting and Fitting Options
This configuration includes no standoff adapter (option 00), making it suitable for direct mounting applications. The probe penetration depth is 11 in , accommodating deeper installation requirements. Fittings include one 3/4-14 NPT plug , one 3/4-14 to 1/2-14 NPT reducer , and a cable seal grip with three interchangeable grommets for cable sizes ranging from 1/8 to 3/8 inches. Mounting threads are 3/4-14 NPT , which must be ordered when the standoff adapter option is not set to 00.
The 24701 housing operates reliably across extreme temperature ranges. CSA certification confirms explosion-proof performance for hazardous locations. Specifically, it carries a T5 rating at -50°C to +40°C and a T4 rating at -50°C to +80°C .
Hazardous Area Approvals
For North American users, the CA24701 version meets Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, plus Class III requirements. The circuit remains non-incendive when connected per drawing 140979. Enclosure Type 4 provides watertight and dust-tight protection. International users outside North America should order the standard 24701 housing without the CA prefix.
Material Advantages
The 303 stainless steel body with a 304 stainless steel sleeve delivers exceptional corrosion resistance. This material choice makes the 24701 housing ideal for coastal installations, chemical plants, and food processing facilities. Typical weight without fittings is 1.8 kg (4.1 lb) , reflecting the robust stainless steel construction.
Proper installation ensures accurate vibration and position measurements over the long term. Follow these steps for best results. First, mount the housing securely to the machine casing using the 3/4-14 NPT threads. Next, connect the probe cable to your monitoring system, ensuring proper routing to avoid sharp bends. Then, adjust the probe penetration to 11 in as specified. Select the appropriate grommet from the included set based on your cable diameter. Finally, torque all fittings to manufacturer recommendations and verify the gap voltage before startup.
Additionally, always inspect the cable seal grip for proper compression during assembly. This component prevents moisture and debris from entering the housing through the cable entry point. Furthermore, ensure the reducer fitting is tightened correctly to maintain the explosion-proof rating. Therefore, a methodical installation directly extends the service life of the 24701-28-10-00-110-03-02 assembly.
The shipment includes the following items:
One 24701 proximity probe housing assembly with 303 stainless steel body and 304 stainless steel sleeve
One 3300 XL 8 mm reverse mount proximity probe with 1.0 m cable
One 3/4-14 NPT plug fitting
One 3/4-14 to 1/2-14 NPT reducer
One cable seal grip with three interchangeable grommets (1/8-3/16 in, 1/4-5/16 in, 5/16-3/8 in)
Mounting thread adapter for 3/4-14 NPT connections
Dome cover and threaded conduit ports
Probe sleeve and O-rings
Thread seal compound
All components ship in original factory packaging. The assembly arrives ready for installation without additional modification.
We ship all orders via FedEx, UPS, or DHL with tracking numbers provided. Domestic deliveries typically take 2 to 5 business days. International shipments usually arrive within 5 to 10 business days depending on customs clearance. Every package includes proper cushioning and anti-static protection. Please inspect the box upon arrival and report any damage immediately.
Q1: Why choose the 24701 stainless steel housing over the 21000 aluminum version?
The 24701 housing uses 303 stainless steel body with 304 stainless steel sleeve, offering superior corrosion resistance for chemical, offshore, and marine environments. The 21000 uses aluminum, which is lighter but less resistant to certain chemicals.
Q2: What does the cable seal grip with multiple grommets do?
This fitting accommodates different cable diameters from 1/8 to 3/8 inches. You simply select the correct grommet for your cable size, ensuring a watertight and explosion-proof seal at the cable entry point.
Q3: Can I use this housing with a standoff adapter if needed?
This specific model 24701-28-10-00-110-03-02 comes without a standoff adapter (option 00). However, the 24701 series supports standoff adapters in other suffix configurations. Please contact us for alternative options.
Q4: What maintenance does the stainless steel housing require?
Regular inspection of O-rings, cable seal grip, and conduit seals is recommended. The 303 and 304 stainless steel materials resist corrosion, so routine cleaning with mild detergents suffices for most applications.
Q5: Is this assembly compatible with existing Bently Nevada monitoring systems?
Yes, the 24701 housing with 3300 XL 8mm probe is fully compatible with standard Bently Nevada 3500 and 1900 series monitoring systems. Please verify your monitor's input specifications before ordering.
| Brand Name | |
| Model No. | 24701-28-10-00-110-03-02 |
| Product Type | Housing Assembly |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
