Epro PR9350/04 Inductive Sensor

The Epro PR9350/04 Inductive Sensor is a robust, non-contact proximity sensor designed to detect metallic objects in demanding industrial environments. This sensor is part of Epro’s proven PR9350 series, which has been widely adopted in critical rotating machinery protection systems, such as turbines, compressors, and generators.

The PR9350/04 is especially engineered to monitor rotational speed and key phase signals. It is frequently used for phase reference measurements, such as detecting a once-per-turn event for vibration monitoring systems. Its rugged stainless steel construction, excellent electromagnetic compatibility, and wide temperature tolerance make it highly dependable for long-term field use.

The sensor operates on the inductive principle, using a built-in coil and oscillator to detect changes in metal proximity. With fast response times, immunity to oil and dirt, and compatibility with high-speed rotating equipment, the PR9350/04 plays a vital role in many predictive maintenance and condition monitoring applications.

Product Specifications

Product Applications

The Epro PR9350/04 is designed for versatile use in industrial monitoring systems that require non-contact detection of metallic targets. Common applications include:

• Phase Reference for Rotating Machinery

  Acts as a once-per-turn trigger for vibration analysis systems, crucial for phase-based measurements.

• Speed Detection and Monitoring

  Measures shaft rotation speed in turbines, generators, and high-speed motors.

• Turbomachinery Protection Systems

  Works in tandem with eddy current sensors to provide complete shaft condition diagnostics.

• Crankshaft or Camshaft Sensing in Engines

  Detects timing events to synchronize control and monitoring functions.

• Gear Tooth Counting

  Detects passage of gear teeth in speed monitoring systems.

• Industrial Automation and Process Control

  General-purpose proximity detection in OEM systems, conveyors, and assembly lines.

Product Advantages

• High Switching Speed

  Supports fast rotating machinery with detection frequencies up to 20 kHz.

• Non-Contact Operation

  Eliminates mechanical wear, ensuring a long operational life.

• Immunity to Contaminants

  Performs reliably even in oily, dusty, or wet environments.

• Easy Installation

  M16 threaded body allows secure mounting into existing structures.

• Compact and Durable

  Stainless steel housing offers corrosion resistance and vibration stability.

• Flexible Integration

  Compatible with Epro and other third-party monitoring systems.

• Robust Electrical Design

  Wide operating voltage and EMI protection make it ideal for industrial control cabinets.

• Minimal Maintenance

  Once installed, the sensor can operate for years without recalibration or service.

• Certified Safety

  CE-compliant with optional ATEX configuration for explosive atmospheres.

• Trusted in Critical Industries

  Proven in power generation, oil & gas, marine, and aerospace machinery.

Frequently Asked Questions (FAQ)

1. What is the main purpose of the PR9350/04 sensor?

   It’s mainly used to detect metal parts passing by, often to track rotation or movement in machinery for monitoring or control.

2. Can this sensor detect any metal object?

   It works best with ferrous metals like steel. Non-ferrous metals may not be detected reliably.

3. How close does the target need to be for detection?

   Typically, the sensor detects objects within about 2 millimeters, depending on the size of the target.

4. What kind of signal does the sensor send out?

   It outputs a simple pulse signal each time a metal object is detected, which equipment can use for counting or timing.

5. Is the sensor easy to install?

   Yes, it screws in with a standard M16 thread, making it easy to mount securely and precisely.

6. Will oil or dust affect the sensor’s performance?

   Not really. It’s sealed with an IP67 rating, so it’s protected against dust and temporary immersion in water or oil splashes.

7. Can it be used on very fast rotating equipment?

   Yes, it can handle detection frequencies up to 20 kHz, suitable for high-speed machinery.

8. What happens if the sensor doesn’t detect a target when it should?

   The system relying on the sensor can be set to trigger an alert or take safety action if pulses stop unexpectedly.

9. Does the sensor need to be calibrated regularly?

   Usually not. Once it’s installed and positioned correctly, it keeps working reliably without much adjustment.

10. Is this sensor safe to use in explosive environments?

    It can be, but only if you choose the version that has the proper ATEX certification for hazardous locations.