EMERSON EZ1900-045 – Non-Contact Eddy Current Displacement Sensor | EZ1900 Series
Engineering Background
The EZ1900 series represents EMERSON’s precision eddy current sensing platform, engineered for continuous shaft displacement and vibration monitoring in rotating machinery. Based on the proven Bently Nevada proximity probe architecture, the EZ1900-045 delivers sub-micron resolution with exceptional linearity across demanding industrial environments — from gas turbines to centrifugal compressors.
Product Positioning
The EZ1900-045 is the preferred choice for maintenance engineers and OEM integrators requiring a drop-in compatible, API 670-compliant proximity probe with a 45 mm armored extension cable. It interfaces directly with Bently Nevada 3300 XL series proximitors and EMERSON CSI machinery health monitors, making it a zero-compromise upgrade or replacement for legacy installations.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | EZ1900-045 |
| Manufacturer | EMERSON (Bently Nevada) |
| Sensor Type | Eddy Current / Inductive Proximity |
| Probe Tip Diameter | 8 mm (standard) |
| Cable Length | 45 mm (extension cable) |
| Measurement Range | 0.25 mm – 2.25 mm (linear range) |
| Sensitivity | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC to 10,000 Hz (–3 dB) |
| Operating Temperature | –35°C to +120°C |
| Supply Voltage | –24 VDC (via proximitor) |
| Output Signal | –2 VDC to –18 VDC (DC gap voltage) |
| Target Material | AISI 4140 steel (standard); other alloys with calibration |
| Connector Type | MIL-C-5015 style, 2-pin |
| Housing Material | 316 Stainless Steel |
| IP Rating | IP67 |
| Compliance | API 670, CE, RoHS |
| Compatible Proximitor | Bently Nevada 3300 XL, 3500/42, EMERSON CSI 6500 |
| Weight | ~200 g (probe + cable assembly) |
Proven Application Environments
- Gas & Steam Turbines — radial shaft vibration and axial position monitoring per API 670
- Centrifugal Compressors — continuous orbit and gap monitoring for predictive maintenance
- Pumps & Fans — bearing housing displacement in high-moisture, high-vibration zones
- Gearboxes — gear mesh frequency analysis and shaft runout detection
- Electric Motors (>500 kW) — rotor eccentricity and air-gap uniformity checks
- Petrochemical & Refinery — ATEX/IECEx zone-compatible installations (with approved barrier)
Engineering Advantages
- Non-contact measurement — zero mechanical wear, infinite service life on the sensing element
- Sub-micron resolution — detects shaft displacement changes as small as 0.5 µm
- Wide frequency bandwidth — captures both slow-roll runout (DC) and high-frequency vibration events up to 10 kHz
- Armored cable construction — stainless steel braid resists crush, abrasion, and chemical attack
- Direct system compatibility — plug-and-play with existing Bently Nevada 3300/3500 infrastructure; no recalibration required for AISI 4140 targets
- Temperature stability — <0.5% sensitivity drift across full –35°C to +120°C operating range
System Architecture & Signal Flow
The EZ1900-045 operates as the sensing element in a three-component eddy current measurement chain:
- Probe (EZ1900-045) — generates a high-frequency electromagnetic field (typically 1 MHz) via an internal coil wound around a ferrite core. The field induces eddy currents in the conductive target (shaft).
- Extension Cable (integrated, 45 mm) — transmits the detuned oscillator signal from probe to proximitor with controlled impedance. Cable length is factory-matched to the proximitor calibration.
- Proximitor / Oscillator-Demodulator (e.g., Bently Nevada 3300 XL 8 mm) — powers the probe, demodulates the signal, and outputs a DC voltage proportional to the gap distance (–2 V to –18 V). This output feeds directly into the 3500 rack monitor or DCS analog input card.
Note: The EZ1900-045 must be used with a matched-system proximitor. Mixing cable lengths or proximitor models without recalibration will introduce linearity errors.
Sourcing & Quality Verification
- Origin: Sourced directly from authorized EMERSON / Bently Nevada distribution channels and verified OEM surplus inventory
- Inspection: Each unit undergoes incoming inspection — connector integrity, cable continuity, and coil resistance check (nominal: 8–12 Ω)
- Documentation: Factory calibration certificate and material traceability available upon request
- Packaging: Ships in original OEM packaging or equivalent ESD-safe protective packaging
- Warranty: 12-month operational warranty against manufacturing defects
Procurement Process
- Confirm target material and shaft diameter with your rotating equipment datasheet
- Verify proximitor model on-site (3300 XL 8 mm or 3500/42 recommended for this probe)
- Place order via Konmask.com product page or contact support@konmask.com for bulk/project pricing
- Lead time: In-stock units ship within 1–3 business days; ETA confirmation provided at order
- Export documentation (CO, packing list, commercial invoice) included for international shipments
Technical FAQ
Q: Can the EZ1900-045 replace a Bently Nevada 330101-00-06-10-02-00 probe?
A: Yes, for most 8 mm, 45 mm cable installations on AISI 4140 targets. Verify proximitor compatibility and re-confirm gap voltage at installation.
Q: What is the maximum shaft speed this sensor can monitor?
A: The 10 kHz bandwidth supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection, well beyond typical industrial turbomachinery requirements.
Q: Is this sensor suitable for ATEX Zone 1 installations?
A: The probe itself is passive and intrinsically safe when used with a certified Zener barrier or galvanic isolator. Confirm the complete loop certification with your safety engineer.
Q: Can I use this probe with a non-EMERSON monitor (e.g., Metrix, Wilcoxon)?
A: Possible with recalibration. The EZ1900 uses standard eddy current physics; however, sensitivity and linearity must be re-verified against the third-party proximitor’s input impedance and supply voltage.
Q: What is the minimum order quantity?
A: Single units available. Volume pricing applies for orders of 5+ units. Contact us for project-based quotations.
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