Epro PR9376/010-001 Hall-Effect Speed Sensor

Product Description

The PR9376/010-001 from the EPRO product line of Emerson Electric is a non-contact Hall-effect sensor developed for accurate rotational speed monitoring and metallic target detection in critical machinery. It is specifically suited for applications where reliable pulse feedback is required for control systems, overspeed protection, and machinery diagnostics.

This sensor detects passing ferromagnetic elements such as gear teeth or shaft features and converts them into stable digital pulse signals. Its rugged enclosure and resistance to environmental stress make the PR9376/010-001 suitable for continuous operation in harsh industrial conditions.

Functional Characteristics

• Contactless sensing eliminates mechanical degradation

• High-speed pulse generation for precise rotational measurement

• Stable signal output under vibration and contamination exposure

• Designed for integration into turbomachinery monitoring systems

• Compatible with API 670-based protection architectures

Technical Specifications

General Information

• Model: PR9376/010-001

• Sensor Type: Hall-effect speed and proximity sensor

• Origin: Germany

• Typical Use: Rotating equipment monitoring

Measurement Performance

• Measurement Functions: Rotational speed, proximity detection

• Signal Output: Digital pulse signal (one cycle per tooth or shaft feature)

• Switching Speed: Approx. 1 μs rise/fall time

• Maximum Frequency Capability: Up to 12 kHz

• Target Material: Ferromagnetic metals (e.g., carbon steel such as ST37)

• Recommended Air Gap:

• ~1.0 mm for fine-pitch gears

• Up to ~1.5 mm for larger gear modules

Electrical Parameters

• Supply Voltage Range: 10 to 30 V DC

• Current Consumption: ≤ 25 mA

• Output Signal Levels (typical at 12 V supply, 100 kΩ load):

• High Level: > 10 V

• Low Level: < 1 V

• Output Type: Digital switching (Hall-effect)

• Internal Resistance: ≤ 400 Ω

Environmental Conditions

• Operating Temperature Range:

• Standard: –25 °C to +100 °C

• Extended industrial variant: –40 °C to +125 °C

• Storage Temperature: –40 °C to +100 °C

• Protection Rating: IP67

• Environmental Resistance: Suitable for oil mist, dust, and moisture

Mechanical Construction

• Housing Material: Stainless steel or nickel-plated brass

• Cable Type: PTFE-insulated cable, optional armored version

• Mounting Style: Threaded installation (commonly M10 or M12)

• Weight: 210 g

• Form Factor: Cylindrical industrial sensor design

Compliance and Standards

• CE (EMC and Low Voltage compliance)

• RoHS compliant

• API 670 compatible when used within a complete monitoring system

Application Areas

The PR9376/010-001 is commonly applied in high-reliability monitoring systems for:

• Steam, gas, and hydro turbines

• Compressors and blowers

• Pumps and industrial fans

• High-speed rotating shafts in process industries

FAQ

Q: What type of signal does the sensor provide?
A: It outputs a digital pulse signal corresponding to each detected gear tooth or shaft feature, suitable for speed calculation and monitoring.

Q: Can it operate in harsh environments?
A: Yes, the IP67-rated enclosure and robust materials allow operation in environments with oil, vibration, and dust.

Q: What is the maximum measurable speed?
A: The sensor supports frequencies up to 12 kHz, enabling accurate monitoring of high-speed machinery.

Q: Is it suitable for safety-critical applications?
A: Yes, when integrated into compliant systems, it meets API 670 requirements for turbomachinery protection.