Product Core Brief
- Model: 330180-91-CN
- Brand: BENTLY Nevada
- Series: 3300 XL 5/8mm DIN Rail Mount Long-Length Proximitor Sensor Line
- Code Definition:
-91= 9m full system compensation + 35mm DIN rail mount;-CN= ATEX/IECEx + Chinese NEPSI dual hazardous area intrinsic safety certification - Core Function: Converts RF eddy-current probe signals to linear DC gap (axial thrust) and AC vibration outputs for complete 9-meter probe + extension cable transducer assemblies.
- Product Type: DIN rail mount analog proximity signal conditioner (Proximitor front end)
- Key Specs: 9.0 m factory-calibrated cable capacitance compensation | 7.87 V/mm (200 mV/mil) linear sensitivity | NEPSI + global ATEX/IECEx dual hazardous certifications
- Condition: New Original (New Surplus)
Product Introduction
The BENTLY 330180-91-CN is a DIN-mount Proximitor calibrated exclusively for full 9-meter 3300 XL 5 mm and 8 mm proximity transducer stacks, widely used on large steam/gas turbines and centrifugal compressors with long field cable routing distances. It separates static shaft offset and dynamic vibration signals for direct analog input to 3500 TSI rack monitor modules or third-party DCS/PLC systems.This unit uses compact 35mm DIN packaging that cuts cabinet slot space consumption by roughly 40% versus panel-mount-only Proximitor variants. Its integrated EMI filtering caps full-span linear error at ≤0.18% at 25 °C—though your mileage may vary with unshielded AC power wiring routed parallel to low-level triaxial signal terminals. Compared to the older 330180-91-05, this CN version adds mandatory China NEPSI certification for domestic hazardous plant site acceptance.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Maximum Supported Transducer Length | 9.0 m (29.5 ft) probe + extension cable combined |
| Mounting Format | Standard 35 mm DIN rail mount, fully isolated aluminum base plate; interchangeable with matching 4-hole panel footprint |
| Compatible Probe Families | All 5 mm and 8 mm 3300 / 3300 XL proximity probes (50 Ω triaxial) |
| Factory Calibrated Sensitivity | 7.87 V/mm (200 mV/mil) linear gap voltage output |
| DC Input Supply Range | -17.5 V DC to -26 V DC nominal; -24 V DC typical operating point |
| Nominal Steady-State Current Draw | 145 mA at -24 V DC supply input, 0.96 W power draw |
| RF Input Interface | Standard gold-plated ClickLoc female coaxial port |
| Minimum Required Output Load | 10 kΩ resistive load across signal COM/VT terminals |
| Continuous Cabinet Operating Temp | -40 °C to +85 °C ambient air |
| Net Unit Weight | 0.246 kg fully assembled blue die-cast aluminum housing |
| Official Compliance Standards | API 670 Rev 4, CE EMC Class A, SIL 2, ATEX/IECEx Zone 2, NEPSI China intrinsic safety |
| Dynamic Vibration Frequency Bandwidth | 5 Hz to 6,000 Hz (-3 dB) for high-speed turbomachinery monitoring |
| Minimum Target Diameter | 15.2 mm flat AISI 4140 steel target |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against OEM production logs, scan factory anti-counterfeit QR labels, inspect aluminum housing for dents, cracked spring terminal blocks, or tarnished RF connector plating.
- Live Functional Test: Mate the unit to a calibrated 9-meter 8mm XL probe stack, supply -24 V DC input, run a 24 hour continuous stability test with ambient temperature logged every 10 minutes.
- Electrical Parameter Test: Run 500 V Megger insulation resistance sweep; acceptable pass threshold reads >10 MΩ between signal terminals and mounting base ground plane.
- Firmware Verification: Well, technically this analog unit contains no firmware, but record paired 3500 rack module firmware revision and photograph spring terminal lock seating tension consistency.
- Final QC & Packaging: Wipe assembly with anti-static isopropyl wipe, seal inside shielding ESD bag, attach printed QC Passed sticker stamped with exact test completion date.
Replacement Pitfall Guide
❗ Firmware Mismatch: 3500 rack firmware Revision F cannot fully compensate capacitance drift on 9-meter transducer runs. Always upgrade rack monitor modules to Revision G before physical installation swap.❗ DIP Switch / Jumper Misconfiguration: Factory internal length calibration defaults to 1 m, not the unit’s rated 9 m; incorrect length values create permanent static offset in thrust position trending data.❗ Terminal / Cable Incompatibility: Do not pair with 11mm XL or 75 Ω NSv transducer cables; mismatched triaxial/coaxial capacitance distorts high-frequency vibration waveforms and triggers persistent channel NOT OK fault flags.❗ Power Supply Mismatch: Each full 9-meter transducer stack draws 145 mA at -24 V DC; calculate total rack power draw with a mandatory 20% load headroom to avoid low-voltage trips during equipment startup transients.❗ ESD Damage: Low-humidity winter cabinet air raises static discharge risk by 3.5x. Place a dedicated anti-static foam mat under the DIN rail before disconnecting or seating the unit’s ClickLoc RF connector.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- 330180-91-CN → All 8mm XL 3301XX & 5mm 33017XX Probes : Direct — 50 Ω triaxial impedance match, zero adapter hardware required
- 330180-91-CN → 330980 NSv Proximitor : Incompatible — 75 Ω NSv circuits cannot calibrate 5/8mm XL 9-meter cable capacitance
- 330180-91-CN → 330180-90-CN : Needs Adaptation — Panel-mount variant, separate DIN clip hardware required for cabinet installation
- 330180-91-CN ↔ 330180-91-05 : Functionally identical electrical performance;
-CNadds NEPSI certification for Chinese hazardous area plant acceptance,-05only carries global ATEX/IECEx/CSA without NEPSI
Benchmarks
- Full span linear error: ≤0.18% (9 m transducer stack, -24 V DC supply, 25 °C controlled ambient)
- RF signal attenuation: 0.028 V/m over maximum 9 m cable length
- Terminal spring cycle durability: 1,000 wire insert/remove cycles with no output resistance shift exceeding 0.10 Ω
