Description
The Bently Nevada 143493-00-080-080-70-CN is a high-precision, eddy-current proximity probe belonging to the 3300 XL NSv (Narrow Side View) Transducer System. It is engineered for industrial applications with tight installation tolerances, such as centrifugal air compressors, refrigeration compressors, and process gas compressors, where small shaft diameters or restrictive counterbore geometries limit the use of standard 8 mm probes. The probe provides dynamic shaft vibration and static position voltage inputs directly to continuous machinery protection monitors like the Bently Nevada 3500 series.
Commercial & Availability Status
- Product Condition: New Original (New Surplus) in factory-sealed packaging
- Warranty Period: 12-month comprehensive technical warranty
- Availability: In stock at our global warehouse facilities
- Estimated Lead Time: Ships within 1 to 3 business days worldwide via DHL/FedEx
- Pricing Notice: Price subject to market conditions; contact us for a firm quote
Technical Specifications
| Parameter | Value |
| Brand | Bently Nevada (Baker Hughes) |
| Model Number | 143493 |
| Full Part Number | 143493-00-080-080-70-CN |
| Transducer System | 3300 XL NSv Proximity Transducer System |
| Thread Type | 3/8-24 UNF-2A (Standard Imperial) |
| Unthreaded Length | 8.0 in (203 mm) |
| Threaded Length | 8.0 in (203 mm) |
| Total Case Length | 16.0 in (406 mm) |
| Total System/Cable Length | 7.0 meters (23.0 ft) with integrated coaxial cable |
| Connector Type | Miniature ClickLoc gold-plated coaxial connector |
| Linear Range | 1.52 mm (60 mils) typical |
| Nominal Scale Factor (ISF) | 7.87 V/mm (200 mV/mil) when paired with NSv Proximitor |
| Target Material Calibration | AISI 4140 steel (standard target) |
| Operating Temperature (Probe) | −51 to +177 °C |
| Approvals / Certification | CN (Approvals for China Hazardous Area / NEPSI compliance) |
Part Number Configuration Breakdown
The exact hardware and physical parameters for 143493-00-080-080-70-CN are designated as follows:
- 143493: Base model indicator for the 3300 XL NSv Proximity Probe (3/8-24 UNF thread option).
- -00: Unthreaded Length option.
00signifies a completely threaded case with 0.0 inches of unthreaded section. - -080: Threaded Case Length option.
080specifies a length of 8.0 inches. - -080: Total Case Length option. Combined with the options above, this yields a total body length of 8.0 inches (entirely threaded).
- -70: Total Cable Length option. This denotes a 7.0-meter system length option with an integrated coaxial cable termination (to connect to a standard NSv extension cable or direct Proximitor, depending on loop architecture).
- -CN: Hazardous Area Approvals option. This designates regional compliance approval for mainland China hazardous zone installations (NEPSI / GB standard certifications).
Engineering Field Notes & Installation Constraints
Critical Application Context: The 3300 XL NSv system is electrically distinct from standard Bently Nevada 3300 XL 8 mm or 5 mm lines. The NSv system operates at a different nominal gap voltage (typically centered around −9.0 V DC instead of −10.0 V DC). You must cross-verify that this probe terminates into a 3300 XL NSv Proximitor Sensor; connecting it to a standard 8 mm Proximitor will result in cross-talk calibration skew and incorrect scale factors.
Counterbore and Side-View Clearance
The primary mechanical advantage of the NSv probe tip is its narrow profile, which minimizes side-view cross-talk with adjacent metal walls. However, when mounting this probe inside a machine casing counterbore hole, you must guarantee a minimum structural clearance diameter around the tip of at least 9.5 mm (0.375 in). Inadequate counterbore diameter will introduce structural parasitic loading to the eddy-current field, distorting the linear measurement envelope.
Coaxial Cable Protection and Bending Radii
The miniature ClickLoc coaxial connector must be kept completely free of moisture, oil, and conductive grease. Always use a connector silicone boot protector during installation, and verify that the coaxial physical routing does not breach the minimum bend radius of 25.4 mm (1.0 in). Tight kinks or compression pinching from conduit plates will alter cable impedance, causing structural high-frequency signal attenuation and false high-vibration spikes in the 3500 rack monitor.
Frequently Asked Questions
Can this probe be connected directly to a 3500/40M or 3500/42M monitor?
No, proximity probes cannot be directly wired into the 3500 monitor terminal strip. The probe must first connect to an intermediate 3300 XL NSv Proximitor Sensor via its matching extension cable. The Proximitor converts the raw RF impedance changes into a proportional −24 V DC analog voltage wave, which is then routed into the 3500 monitor input channels.
Can I use this 7.0-meter probe without an extension cable?
If your engineering loop layout places the Proximitor sensor exactly 7.0 meters away from the probe tip mounting boss, you can connect the probe’s ClickLoc tail directly into a 7.0-meter configured Proximitor sensor. You must match total system length—never combine a 7.0-meter probe with a 5.0-meter extension cable, as the total calibrated loop length must precisely align with the Proximitor’s design parameters (typically 5.0m or 7.0m systems).
What target material is this probe calibrated for out of the box?
The standard 143493 probe is calibrated at the factory using AISI 4140 high-grade carbon steel. If your machine shaft or rotor collar is forged from an alternative material (such as K-Monel, Inconel, or 300-series stainless steel), the probe will exhibit an altered scale factor. For non-standard targets, you must apply a specific material multiplier correction factor within the 3500 configuration software or request a custom calibration block from the manufacturer.
