PR9373/010-011 (EPRO/Emerson magnetic resistance type speed / phase-shifting sensor)

PR9373/010-011 (often confused with PR9376, of the same series of magnetic resistance type) is a non-contact speed / phase-shifting sensor of EPRO (now Emerson), used for speed measurement, phase alignment, and zero-speed monitoring of rotating machinery (turbo generators, compressors, etc.), and is compatible with MMS6000/MMS3000 systems.

Model Disassembly

PR9373: Magnetoresistive Speed / Phase Comparator Sensor Series

010: Cable length 3 meters, armored

011: Standard sensitivity, 14mm probe, push-pull output

Order Number: 9200-00097

Core function

Speed measurement: Measuring gear/keyway pulses, range 0–30,000 rpm, suitable for gears with 1–5 teeth (St37 steel).

Phase alignment: Every 1 revolution, provides a phase reference for vibration analysis, used for dynamic balance/fault diagnosis.

Zero speed monitoring: Reliable detection of low speed (<1 rpm), used for alarm in the crankshaft state.

Non-contact measurement: No wear, air gap 0.8–1.2mm (for modulus 1), 1.5–2.0mm (for modulus ≥2). Technical Specifications

Principle: Magnetoresistive (Hall Effect), Differential Half-Bridge Design

Power Supply: 10–30VDC, ≤25mA (24V)

Output: Push-Pull Pulse (Short-Circuit Protection); High Level > 10V, Low Level < 1V (12V/100kΩ Load)

Frequency: 0–12kHz (Maximum 720,000 cpm)

Response: Rise/Fall ≤ 1μs; Response Time < 1ms

Probe: φ14mm, Length 124mm, Stainless Steel Shell

Cable: 3m (010), PTFE Insulation,铠ized optional

Temperature： -25℃～+100℃ (Short-term 120℃/30s)

Protection： IP67， Waterproof and Dustproof

Accuracy： ±1% Full Scale

Typical Accessories (TSI System)

Sensor： PR9373/010-011 (Speed / Phase Alignment)

Monitoring Card： 9610-00013n (MMS6000 Speed Channel)

Communication Module： MMS6823R (Data Upload to DCS)

Configuration Software： MMS6910 (Parameter Configuration)

Difference from PR9376

PR9373： Economy Type， Standard Sensitivity， Suitable for Small and Medium-sized Units

PR9376： High Sensitivity， Wide Temperature Range (-40℃～+120℃)， Special for Large Steam Turbines

Installation Tips

Align the gear tooth tip， air gap 1.0mm (modulus 1)

Gear Material： Soft Iron / Steel (Non-Stainless Steel)， Tooth Width ≥ 10mm

Cable Shielding Single End Grounding， Away from Strong Electrical Interference