Bently Nevada 330878-90-CN - 3300 XL Proximitor Sensor

Bently Nevada 330878-90-CN 3300 XL 50 mm Proximitor Sensor

Product Introduction

The Bently Nevada 330878-90-CN belongs to the high-performance 3300 XL series. This 50 mm Proximitor Sensor measures vibration and position without contacting the target. Its thin housing fits both high-density DIN-rail installations and traditional panel mount configurations.

Moreover, the sensor provides excellent RFI/EMI immunity. Therefore, nearby high-frequency radio signals cannot disrupt the transducer system. SpringLoc terminal strips need no special tools, so field wiring becomes faster and more reliable.

Country Specific Approval Feature

The 330878-90-CN carries the "CN" approval option. This means country specific approvals instead of standard multiple approvals or no approvals.
These approvals meet local regulatory requirements for specific regions. Consequently, you can use this sensor in applications where regional certification is mandatory.

If you need CE or other standard approvals, choose a different approval option code like "05". For no approvals, select "00".

Key Technical Specifications

The Bently Nevada 330878-90-CN accepts one noncontacting 3300 XL 50 mm probe plus an extension cable.
Power requirement ranges from -17.5 Vdc to -26 Vdc without barriers at 12 mA maximum consumption. With barriers, use -23 Vdc to -26 Vdc.
Operation at a voltage more positive than -23.5 Vdc may reduce the linear range.
Output resistance is 50 Ω.
Extension cable capacitance measures 69.9 pF/m (21.3 pF/ft) typical.

Factory calibration is set to AISI 4140 steel. However, you can request calibration to other target materials.

Mechanical and Environmental Parameters

The 330878-90-CN uses A380 aluminum for its Proximitor Sensor housing.
Operating temperature ranges from -51°C to +100°C (-60°F to +212°F).
Storage temperature ranges from -51°C to +105°C (-60°F to +221°F).

These wide limits allow reliable use in harsh industrial environments like turbines, compressors, and large rotating machinery.

Frequently Asked Questions (FAQ)

1. What does "CN" country specific approval mean for this sensor?
The 330878-90-CN carries approvals tailored to specific regional requirements. Contact Bently Nevada to confirm which countries these approvals cover.

2. Can I use the 330878-90-CN with a different target material?
Yes. The factory can recalibrate this 3300 XL Proximitor Sensor to other materials. Contact your supplier to arrange special calibration.

3. What voltage supply does this sensor need with barriers?
With barriers, you must supply between -23 Vdc and -26 Vdc. Operating above -23.5 Vdc may reduce the linear measurement range.

4. How does the 330878-90-CN differ from the standard 330878-90-00?
The only difference is the approval option. The 330878-90-CN has country specific approvals, while the -00 version has no approvals. All other specifications remain identical.

5. What is the total system length of this model?
The Bently Nevada 330878-90-CN has a fixed 9.0 metres (29.5 feet) system length. Use the correct extension cable to keep 69.9 pF/m capacitance for accurate readings.