The Bently Nevada 330191-40-75-10-CN belongs to the renowned 3300 XL series, which sets a high standard for eddy-current proximity probes. This model offers a compact 8 mm diameter sensing element, ideal for measuring shaft vibration, thrust position, and eccentricity in critical machinery.
Engineers value this probe for its robust construction. The tip uses a molded PPS (polyphenylene sulfide) encapsulation that protects the internal coil effectively. Additionally, the probe body features AISI 303 or 304 stainless steel, which resists corrosion and mechanical stress. Therefore, this sensor performs consistently in demanding environments like steam turbines, gas compressors, and large pumps.
This specific variant, 330191-40-75-10-CN, comes without armor and includes a 1.0-meter (3.3 feet) FEP-insulated triaxial cable. It also carries a Country Specific Approval (CN), ensuring compliance with local regulatory standards.
The 330191-40-75-10-CN operates on a DC power supply ranging from -17.5 Vdc to -26 Vdc. However, when using barriers, the required range is -23 Vdc to -26 Vdc. For optimal linear range, avoid operating at voltages more positive than -23.5 Vdc. The probe draws a maximum current of 12 mA and has an output resistance of 50 Ω.
Furthermore, the power supply sensitivity remains less than 2 mV change per volt change in input voltage. This ensures stable output even with minor supply fluctuations. The nominal DC resistance (RPROBE) from the center conductor to the outer conductor measures 7.59 ± 0.50 Ω for this 1.0-meter length.
The probe tip material is PPS, while the case uses AISI 303 or 304 stainless steel. The standard cable is a 75 Ω triaxial type with FEP insulation, suitable for various total lengths. For this model, the 1.0-meter integral cable eliminates the need for an extension cable, simplifying installation.
This proximity probe offers excellent mechanical strength. The patented CableLoc design provides 330 N (75 lbf) pull strength between the probe case and the lead, while the connector area withstands 270 N (60 lbf). The maximum connector torque is 0.565 N•m (5 in•lbf), and the thread engagement length for the 3/8-24 UNF case thread is 0.563 inches.
Regarding temperature, the 330191-40-75-10-CN supports a wide ambient range from -55°C to +232°C for T1 classification, with lower maximums for higher temperature classes. For EPL Ga and Gc, the ratings are T1 (-55 to +232°C), T2 (-55 to +177°C), T3 (-55 to +120°C), T4 (-55 to +80°C), and T5 (-55 to +40°C). For EPL Dc, the temperature ratings are T280°C, T225°C, T170°C, T130°C, T105°C, and T90°C, depending on the ambient conditions.
The probe also includes a Viton® O-ring to seal differential pressure between the tip and case. However, note that Bently Nevada does not pressure-test these probes before shipment.
Proper installation ensures accurate measurements and long service life. First, verify the target surface meets the required finish and material specifications for eddy-current probes. Next, thread the 330191-40-75-10-CN into the mounting hole using the 3/8-24 UNF threads, ensuring the thread engagement does not exceed 0.563 inches.
For optimal linear range, supply a stable DC voltage between -23.5 Vdc and -26 Vdc when using barriers. Additionally, use only Bently Nevada extension cables and proximity systems to maintain entity parameters and safety certifications. Avoid over-tightening the connector; apply no more than 0.565 N•m (5 in•lbf) of torque.
Meanwhile, consider the cable routing carefully. Although this model lacks armor, the FEP insulation provides good chemical and thermal resistance. Keep the cable away from sharp edges and high-temperature surfaces beyond its rated limits.
Your shipment of the Bently Nevada 330191-40-75-10-CN includes the following items:
One 3300 XL 8 mm ETR probe (integral 1.0-meter cable, no armor)
Installation instruction sheet (quick reference)
Protective plastic cap for the probe tip (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 tracking numbers provided upon dispatch.
Q1: Can I use the 330191-40-75-10-CN with a non-Bently Nevada extension cable?
A1: No. For accurate readings and to meet entity safety parameters, you must use genuine Bently Nevada extension cables and connect to Bently Nevada proximity systems.
Q2: What is the difference between the standard and extended temperature range cables?
A2: The standard cable uses FEP insulation, while the extended range cable uses PFA. This model includes the standard FEP cable, which is sufficient for most industrial applications from -55°C to +232°C.
Q3: Does this probe require an extension cable?
A3: No. The 330191-40-75-10-CN has a 1.0-meter total length, which is a one-meter system that does not need an extension cable.
Q4: How do I know if the probe tip is damaged?
A4: Visually inspect the PPS tip for cracks or chips. Also, measure the DC resistance between the center and outer conductors; it should be 7.59 ± 0.50 Ω for this model. A significant deviation may indicate damage.
Q5: What shipping methods do you offer?
A5: We ship all orders via Fedex, UPS, or DHL with full tracking. Express shipping options are available upon request.
| Brand Name | |
| Model No. | 330191-40-75-10-CN |
| Product Type | Proximity Probe |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
