June 06, 2026

Bently Nevada 19049-04 Proximitor Sensor Product Specification

19049-04 is an original US-manufactured eddy-current proximitor driver unit belonging to Bently Nevada classic 7200 series transducer system, specially engineered to match 11mm diameter non-contact proximity probes as the core signal conversion component of complete shaft displacement and vibration measuring chain. Designed for offline cabinet mounting or field local installation, this proximitor supplies stabilized excitation power to matched eddy-current probe, converts tiny impedance variation induced by target metal clearance change into standardized linear negative DC output voltage, and transmits processed analog signal to 7200 series rack monitor boards such as 19195BH,19156-01C for subsequent alarm threshold judgment and interlock control. With conformal coated internal circuit board for anti-dust, anti-moisture and anti-corrosion protection, the unit is widely deployed across thermal power, petrochemical refining, metallurgy and large pump station industries for continuous online monitoring of steam turbines, centrifugal compressors, large induced draft fans and high-speed rotating equipment. The whole assembly follows mature analog circuit design verified by decades of global on-site industrial operation and serves as standard spare replacement part for legacy 7200 TSI system retrofit and maintenance projects worldwide.

Description

Bently Nevada 19049-04 Proximitor Sensor Product Specification

1. General Product Overview

2. Application Coverage

Working in coordination with 11mm diameter proximity probe and matched extension cable (max permissible cable total length up to 5 meters), 19049-04 forms a full non-contact measuring loop for rotating machinery physical parameter collection. Its core measuring targets include radial shaft vibration, static shaft clearance, axial thrust position and rotor eccentricity of bearing-supported rotary shafts; when paired with Keyphasor pickup accessory, it also supports auxiliary rotational speed signal collection for phase reference calibration of monitoring system. After internal amplification and linear compensation, converted standard voltage output can be directly connected to rack-mounted TSI monitoring modules, site local indicator meters or DCS/PLC acquisition card terminals to realize real-time equipment health tracking and over-limit safety trip interlock. Different from contact-type displacement sensors, the eddy-current measuring principle eliminates mechanical wear issue, making this proximitor suitable for long-term uninterrupted measurement on high-speed rotating equipment under heavy-duty continuous production conditions.

3. Detailed Electrical Performance Specifications

3.1 Power Supply Specifications

Rated input power range is -18VDC ~ -25VDC regulated direct current with nominal operating voltage at -24VDC, built-in internal transient surge suppression and reverse power polarity protection circuit to prevent component burnout from wrong field wiring during installation and routine maintenance. Low static power consumption design effectively controls continuous heat generation to adapt sealed cabinet confined space operation environment without extra auxiliary heat dissipation parts.

3.2 Probe Input Interface

Probe signal access adopts miniature male coaxial connector for plugging matched extension cable, which transmits both excitation power from proximitor to probe and impedance feedback signal from probe back to internal processing circuit. The whole measuring system is factory calibrated based on AISI4140 standard carbon steel target material with fixed nominal sensitivity of 7.87V per millimeter (equal to 200mV per mil), guaranteeing linear measuring accuracy within full rated clearance range of supporting 11mm probe. Internal integrated EMI filtering circuit restrains interference generated from surrounding high-voltage cabinet and variable frequency driving equipment to secure stable measuring precision under complicated industrial electromagnetic field.

3.3 Analog Output Parameter

Three-terminal screw terminal block serves as power and signal output interface marked with OUT, COM and -24V power pins; the output delivers linear negative DC voltage proportional to probe-target clearance variation ranging from 0V to around -22VDC within calibrated linear range. The output signal can be split into two application paths: one connects to 7200 series rack monitor card for limit comparison and relay alarm output, another links to field secondary instrumentation for local real-time value display on-site.

3.4 Built-in Fault Diagnostics Function

Passive loop fault detection function is embedded inside circuit without digital communication interface. The unit outputs abnormal offset voltage when detecting typical field failures including probe inner core wire open circuit, extension cable breakage, coaxial terminal short-circuit or probe clearance exceeding rated linear measuring boundary; maintenance staff can rapidly locate faulty section of measuring loop via abnormal output voltage drift without extra professional testing instruments.

4. Mechanical Structure & Environmental Operation Rating

4.1 Mechanical Dimension & Mounting Feature

Compact standalone rectangular housing design with net weight approximately 0.17kg, standard wall or DIN rail mounting hole reserved on housing shell for flexible field installation inside control cabinet or equipment local junction box without special customized fixing bracket. All internal PCB components adopt anti-vibration soldering craftsmanship to resist periodic mechanical vibration generated by adjacent running equipment for long-term service stability.

4.2 Ambient Working Conditions

Permitted continuous operational ambient temperature spans from -55°C to +100°C, covering both high-temperature cabinet interior and relatively low-temperature outdoor auxiliary equipment field installation scenarios. Allowable storage and transit temperature ranges from -60°C to +110°C to adapt cross-region spare part transportation and long-term warehouse inventory storage requirement. Rated applicable relative humidity is 5%~95% non-condensing to avoid PCB short-circuit damage caused by dew accumulation and cabinet internal dampness; the product is suitable for indoor cabinet installation and limited protected semi-outdoor mounting, forbidden for fully open-air exposure without sealed protection enclosure.

5. Core Product Advantages

First, fixed factory-calibrated sensitivity and mature analog circuit layout deliver outstanding measurement consistency and long service lifespan, fully interchangeable with original standard 7200 series matching accessories to simplify spare replacement and on-site system upgrade work. Second, compact standalone housing supports diversified installation modes including DIN rail and wall fixing to satisfy diversified field cabinet layout demands. Third, wide operating temperature tolerance enables application on equipment with high ambient working heat such as steam turbine adjacent auxiliary cabinet and high-temperature process plant control room. Fourth, integrated multi-level circuit protection reduces damage probability from field misconnection and instantaneous grid voltage fluctuation, lowering later maintenance and spare procurement cost for end users.

6. Quality Standard and Warranty Terms

19049-04 proximitor is authentic US-origin product complying with Bently Nevada internal factory quality inspection specification and relevant industrial electrical safety standards for global industrial automation market supply. When installed and operated strictly within specified electrical and environmental parameters without artificial physical damage, improper power wiring or overvoltage abuse, the product is covered by standard twelve-month limited factory warranty against inherent original manufacturing defects calculated from formal goods delivery date.

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