PR9376/010-011 EPRO Hall Effect Speed & Keyphasor Sensor

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PR9376/010-011 is a high-reliability differential Hall effect speed and keyphasor sensor from EPRO (Emerson), widely adopted in rotating machinery protection systems. Unlike eddy current probes, this sensor reads ferromagnetic gear teeth or shaft key slots to deliver clean square-wave pulse signals for rotational speed calculation, zero-speed detection, rotation direction identification and key phase reference. It is a core spare part for overspeed safety loops on critical plant assets and conforms to API 670 machinery protection standards.

This complete assembly integrates sensing head, factory-fitted stainless steel armored cable and molded connector. The differential circuit design greatly suppresses electromagnetic interference in environments with high vibration, strong magnetic fields, oil mist and steam. Stable pulse edges ensure accurate phase marking and reliable overspeed trip logic even under continuous long-running industrial conditions. It cannot be mixed with eddy current probe chains such as PR6426 + CON021 and requires matching speed monitor channels like the A6312 module for proper signal processing.

We supply tested PR9376/010-011 units, including new surplus stock. Each sensor is inspected for housing integrity, cable armor continuity, connector pin condition and pulse output before shipment, ready for direct drop-in replacement for maintenance outage and plant retrofit projects.

Key Features

Differential Hall effect non-contact sensing Keyphasor and shaft speed dual function Zero-speed capable, no blind zone at standstill Square wave pulse output with fast rise/fall time Stainless steel sealed sensing head, IP67 rated Stainless steel armored oil-resistant cable Built-in EMC protection for heavy EMI environments Designed for overspeed protection and predictive maintenance Compatible with EPRO A6312 monitoring rack Suitable for continuous operation in power, oil & gas and petrochemical plants High shock and vibration resistance for bearing housing installation Ferromagnetic target only, for gear tooth and keyway triggering

Product Specifications

Part number: PR9376/010-011 Manufacturer: EPRO (Emerson) Measurement principle: Differential Hall effect Main functions: Rotational speed, zero-speed monitoring, key phase reference Supply voltage: 10–30 VDC Max operating frequency: 12 kHz (up to 720,000 RPM) Output: Push-pull square wave; High >10 V, Low <1 V Rise / fall time: <1 µs Recommended air gap: 1.0 mm for module 1 gear, 1.5 mm for module 2 and larger Target material: Ferromagnetic steel / soft iron Sensor housing: Stainless steel Cable: Integrated stainless steel armored cable Protection class: IP67 Operating temperature: -40 °C to +100 °C Mounting thread: M12 ×1.5 Load limit: Max 400 Ω resistive, 30 nF capacitive System matching: A6312 speed monitor module Compliance: API 670 for machinery protection

PR9376/010-011

Typical Applications

Steam turbine overspeed protection Gas turbine key phase and speed monitoring Centrifugal compressor safety trip systems Large generator shaft phase reference High-speed fan and blower condition monitoring Refinery and chemical plant rotating machinery protection Power station turbine retrofits and spare part replacement Predictive maintenance and vibration analysis phase locking

Why Choose Our PR9376/010-011 Sensor

We specialize in hard-to-source EPRO / Emerson machinery protection spare parts for B‑end buyers, system integrators and plant maintenance teams. Every PR9376/010-011 unit is verified for correct pulse output, cable shielding and connector integrity before dispatch. Since overspeed circuits are safety-critical, we avoid untested salvaged probes for protection loops.

We support formal quotations, commercial invoices, packing lists and consolidated shipping with related vibration monitors, eddy current probes and signal conditioning modules. If you need datasheet check, cross-reference confirmation or bulk plant spare pricing, send your inquiry with quantity and target lead time.

Related Search Keywords

PR9376/010-011, EPRO PR9376 speed sensor, PR9376 keyphasor sensor, Hall effect speed pickup for turbine, Emerson key phase sensor, A6312 compatible speed probe, rotating machinery overspeed sensor, API 670 speed sensor, PR9376 armored cable sensor, turbine zero-speed sensor.

FAQ

Is PR9376/010-011 an eddy current probe? No. It is a differential Hall effect sensor for speed and key phase. It works only on ferromagnetic targets and must connect to dedicated speed monitor channels, not eddy current preamplifiers such as CON021.

Can it detect speed when the shaft is stationary? Yes. This model supports zero-speed detection, which is essential for standstill interlock and startup protection logic.

What monitor module matches this sensor? It is designed to pair with the EPRO A6312 speed monitor. Signal levels and wiring are not interchangeable with standard proximity vibration channels.

Do you offer volume pricing for plant frame orders? Tiered pricing is available for bulk procurement, annual spare part contracts and multiple-unit retrofit jobs. Submit your part list and delivery schedule for a formal offer.

EMERSON BRAND

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