What This Assembly Is Intended For

The 330930-040-03-CN is a reverse-mount proximity probe assembly specifically designed for shaft vibration and position measurement in rotating machinery. Unlike standard front-mount probes, this configuration supports installation from the rear side of the mounting surface, making it suitable for equipment with limited front space or specific mechanical constraints.

Within monitoring systems, this product is frequently selected when spatial constraints, alignment requirements, or housing designs necessitate a reverse-mounted sensing solution, while still maintaining stable measurement performance.

Measurement Principle and Signal Path

The probe operates based on the eddy current induction principle. When positioned near a conductive target, the probe tip generates an electromagnetic field. Changes in the distance between the probe and the target alter the probe's electrical response.

This response is transmitted via a connecting cable to a compatible Proximitor® sensor, which converts the signal into a standardized output for vibration or position monitoring. The non-contact design ensures continuous measurement without mechanical wear, even under demanding operating conditions.

Where It Is Commonly Applied

Steam and gas turbines with limited front-end space

Compressors requiring rear-mounted probe installation

Large pumps with enclosed bearing housings

Generators and motors in compact mechanical layouts

Critical rotating equipment in power generation and chemical industries

Product Data & Parameters

Parameter	Value
Manufacturer	Bently Nevada
Model Number	330930-040-03-CN
Product Type	Reverse Mounting Proximity Probe Assembly
Measurement Method	Eddy current, non-contact
Mounting Style	Reverse mount
Probe Tip Diameter	8 mm
Thread Specification	M10 × 1
Housing Material	Stainless steel
Nominal System Sensitivity	7.87 V/mm (200 mV/mil)*
Effective Measurement Range	Approx. 2 mm (80 mils)
Target Material	Conductive metal (typically steel)
Operating Temperature Range	–35 °C to +177 °C
System Compatibility	Bently Nevada proximity systems with Proximitor®

How Our Customers Benefit

Reliable Access to Hard-to-Find Components

Large-Scale Inventory for Immediate Needs

Proven Experience in Industrial Automation Supply

Fast Dispatch and Emergency Shipping Options

Strict Inspection and Secure Packaging

Questions Raised During Purchasing

Q: How does this differ from standard front-mounted probes?

A:Yes. This model is specifically designed for situations with limited front space or where conventional operation is impractical, supporting reverse mounting.

Q: Can it be used on high-speed machinery?

A:Yes. When properly installed and aligned, this product is commonly used on high-speed rotating equipment.

Q: Does this assembly include a Proximitor sensor?

A:No. The probe assembly is supplied separately and requires pairing with a compatible sensor.

Q: Is it suitable for continuous operation?

A: Yes. The non-contact design supports long-term, uninterrupted monitoring.

Get in Touch

Contact Method	Information
Email	sales3@mooreplc.com
WhatsApp / Phone	+86 180 2071 4662

Reach Out to Us

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