The Bently Nevada 330191-40-75-05-05 represents the latest evolution in eddy-current proximity sensing technology. As part of the trusted 3300 XL series, this 8 mm probe delivers precise measurements of shaft vibration, thrust position, and rotational speed in critical rotating machinery.
This particular variant stands out with its multi-agency approval package, including CSA, ATEX, and IECEx certifications. Consequently, you can install it confidently in hazardous locations requiring strict compliance with international safety standards. The probe uses a molded PPS tip that encapsulates the sensing coil more thickly than previous designs, providing exceptional ruggedness against physical abuse.
Moreover, the stainless steel case (AISI 303 or 304) offers robust mechanical protection. The 0.5-meter (1.6 feet) total length makes this probe ideal for installations with short cable runs, eliminating the need for extension cables. The 3/8-24 UNF thread ensures compatibility with standard mounting hardware.
The 330191-40-75-05-05 requires a DC supply voltage between -17.5 Vdc and -26 Vdc for nonincendive circuit connections. However, when using safety barriers, the input must stay within -23 Vdc to -26 Vdc. Operating at voltages more positive than -23.5 Vdc may reduce the linear measurement range. The probe consumes a maximum of 12 mA and presents an output resistance of 50 Ω.
Supply sensitivity is exceptionally low at less than 2 mV change per volt change in input voltage, ensuring stable readings even with minor power variations. The nominal DC resistance from the center conductor to the outer conductor measures 7.45 ± 0.50 Ω for this 0.5-meter length.
The standard cable uses 75 Ω triaxial construction with FEP insulation, providing reliable signal transmission. For extended temperature applications, an optional PFA-insulated cable is available upon request. The probe tip material is PPS, while the case uses corrosion-resistant AISI 303 or 304 stainless steel.
Mechanical strength is a hallmark of the 3300 XL design. The patented CableLoc system provides 330 N (75 lbf) pull strength between the probe case and lead, while the connector area withstands 270 N (60 lbf). Apply no more than 0.565 N•m (5 in•lbf) of torque to the connector. The 3/8-24 thread accepts a maximum engagement length of 0.563 inches.
The 330191-40-75-05-05 operates across a wide ambient temperature range. For EPL Ga and Gc applications, temperature classifications include T1 (-55°C to +232°C), T2 (-55°C to +177°C), T3 (-55°C to +120°C), T4 (-55°C to +80°C), and T5 (-55°C to +40°C). For EPL Dc, the ratings are T280°C, T225°C, T170°C, T130°C, T105°C, and T90°C, depending on the ambient conditions.
A Viton® O-ring seals the differential pressure between the probe tip and case. However, note that Bently Nevada does not perform pressure testing before shipment.
Proper installation maximizes performance and longevity. First, verify the target surface meets the required finish for eddy-current probes. Next, thread the 330191-40-75-05-05 into the mounting hole using its 3/8-24 UNF threads, ensuring engagement does not exceed 0.563 inches.
For optimal linearity, supply a stable voltage between -23.5 Vdc and -26 Vdc when using barriers. Additionally, always use Bently Nevada extension cables and Proximitor systems to maintain entity parameters and safety certifications. Avoid over-tightening connectors; the maximum torque is 0.565 N•m (5 in•lbf).
Route the cable carefully to avoid sharp edges and excessive heat. Although this model lacks armor, the FEP insulation provides good chemical and thermal resistance for most industrial environments.
Your shipment of the Bently Nevada 330191-40-75-05-05 includes:
One 3300 XL 8 mm ETR probe (integral 0.5-meter cable, no armor)
Quick-reference installation guide
Protective tip cover for shipping
Note: Certificates, calibration reports, and warranty documents are not included in this standard packaging. Please request them separately if needed.
All orders ship via Fedex, UPS, or DHL with full tracking information provided upon dispatch.
Q1: What approvals does the 330191-40-75-05-05 carry?
A1: This model carries CSA, ATEX, and IECEx approvals, making it suitable for installation in hazardous areas requiring these international certifications.
Q2: Does this 0.5-meter probe need an extension cable?
A2: No. The 330191-40-75-05-05 has a total length of 0.5 meters, so it functions as a complete one-piece system without requiring an extension cable.
Q3: What happens if I operate at a voltage more positive than -23.5 Vdc?
A3: Operating above -23.5 Vdc may reduce the linear range of the probe, leading to less accurate measurements. We recommend staying within -23.5 to -26 Vdc for best performance.
Q4: Can I use this probe with non-Bently Nevada extension cables?
A4: No. To maintain entity safety parameters and measurement accuracy, you must use genuine Bently Nevada extension cables and connect to Bently Nevada Proximitor systems.
Q5: What shipping methods do you offer?
A5: We ship all orders via Fedex, UPS, or DHL. Express and economy options are available upon request, with tracking numbers provided for every shipment.
| Brand Name | |
| Model No. | 330191-40-75-05-05 |
| Product Type | Proximity Probe |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
