I. Basic Information

Model Code Explanation

Product Positioning

Hardware Architecture

Mounting & Supporting System

• Mounting Method: 3/8-24 UNF threaded installation with anti-loose lock nut; recommended initial installation gap 1.27mm (-9VDC output)
• Minimum Cable Bending Radius: 8 times of cable outer diameter, avoid sharp bending and extrusion of armored cable
• System Matching Rule: Total length of probe cable plus extension cable must be consistent with rated length of the matched proximitor; 5m and 9m systems cannot be mixed
• Supporting Devices: 3300 XL armored proximitor, matched armored extension cable, TK-3 gap calibrator, 3500 monitoring rack
• Typical Application Industries: Thermal power plants, petrochemical compressor facilities, metallurgical heavy fan units, large pump sets with harsh wiring and hazardous explosive working conditions

Product Features

1. Stainless steel flexible armored cable provides superior resistance to abrasion, tension, extrusion and oil corrosion, drastically reducing cable failure rate in complicated industrial sites.
2. High linear measurement accuracy with 2mm effective span and standard sensitivity of 7.87V/mm, applicable for both static displacement and high-frequency dynamic vibration acquisition.
3. Wide operating temperature range from -51℃ to +177℃ with built-in temperature compensation to eliminate thermal drift for high-temperature bearing housing measuring points.
4. IP67 sealing plus multi-certified explosion-proof approval allows safe deployment in Zone 1 and Zone 2 hazardous flammable process areas.
5. Same-series sensor components are fully interchangeable without recalibration, only gap calibration is required after spare part replacement to shorten maintenance downtime.
6. Double inner shield plus outer armor realizes dual electromagnetic interference suppression, effectively preventing signal fluctuation and false protection caused by on-site high-power equipment radiation.
7. Non-contact measuring mode eliminates mechanical wear, supporting 24/7 long-term continuous on-line monitoring with low life-cycle maintenance cost.

II. Technical Specifications

2.1 Electrical Parameters

• Sensor Type: 3300 XL 8mm armored eddy current proximity probe
• Nominal Sensitivity: 7.87 V/mm (±6.5% tolerance)
• Linear Measuring Range: 0.25mm ~ 2.3mm, effective linear span 2mm
• Recommended Install Gap: 1.27mm, corresponding output voltage -9VDC
• Frequency Response: 0～8kHz
• Probe DC Resistance: 7.45±0.5Ω
• Proximitor Power Supply: -17.5～-26VDC, Max. Operating Current 12mA
• Linearity Deviation: ≤±38μm

2.2 Mechanical Parameters

• Mount Thread: 3/8-24 UNF imperial external thread
• Unthreaded Length: 0mm; Total Housing Length: 1.6 inch
• Built-in Cable Length: 1.0m, double-shielded inner cable + stainless steel armored outer sheath
• Connector Type: ClickLoc miniature coaxial quick-lock connector
• Tip Material: High-temperature resistant PPS; Housing Material: 304 stainless steel
• Ingress Protection Rating: IP67

2.3 Environmental Specifications

• Operating Temperature: -51℃ ~ +177℃
• Storage Temperature: -40℃ ~ +177℃
• Operating Humidity: 5%～95%RH (non-condensing)
• MTBF: ≥280000 Hours

2.4 Physical Parameters

• Mounting Mode: Threaded fixed installation with anti-loose lock nut
• Net Weight: 323g
• Sealing Structure: Viton O-ring full hermetic sealing

III. Key Features

1. Real-time radial vibration monitoring for heavy rotating equipment in abrasion-prone harsh sites to realize early warning of rotor unbalance, misalignment and bearing failure.
2. High-precision axial displacement and differential expansion measurement to prevent axial friction and collision of turbine and compressor units under high-temperature and hazardous working conditions.
3. Key phase pulse signal acquisition for rotating speed calculation, vibration spectrum analysis and dynamic balance correction of critical process equipment.
4. Built-in wide-temperature compensation ensures stable measuring output for high-temperature bearing seat measuring points.
5. Multi-standard explosion-proof certification meets electrical safety requirements for flammable and explosive petrochemical process plants.
6. Standardized mechanical and electrical interfaces support rapid on-site spare part replacement with only gap calibration required before commissioning.

IV. Working Principle

V. Application Scenarios

1. TSI safety monitoring for thermal and gas turbine generator units, covering vibration, axial displacement, rotating speed and key phase measurement of high-temperature bearing housings and densely wired measuring points.
2. On-line condition monitoring for centrifugal compressors and expansion units in petrochemical hazardous process plants to realize surge and bearing fault early warning and avoid unplanned plant shutdown.
3. Bearing vibration protection for metallurgical large blast furnace fans and sintering main exhaust fans under severe long-term vibration operating conditions.
4. Predictive maintenance for heavy-duty oil and gas transfer pump sets with oil splashing and cable abrasion-prone measuring locations.
5. Technical renovation and in-situ replacement of ordinary non-armored probes which frequently suffer cable damage in high-risk industrial sites, reusing existing proximitors, extension cables and monitoring configuration programs to reduce retrofit costs.