Excellent PLC
| Company Information | ||||||||
| sales@xmjzjsgs.com | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Overview
The Bently Nevada 330850-51-05 is part of the 3300 XL 25 mm Proximitor Sensor system, designed to monitor differential expansion (DE) in mid-to-large steam turbines. It offers a linear measurement range of 12.7 mm (500 mils) and delivers 0.787 V/mm (20 mV/mil) output for precise monitoring of axial movement between the rotor and stator.
Key Applications
-
Differential expansion monitoring in steam turbines
-
Suitable for high-temperature environments
-
Used in turbine generators for axial movement detection
-
Ideal for machines with collar or ramp-type DE targets
Product Advantages
-
Wide linear range (12.7 mm) with stable output
-
High durability in extreme environments (up to 250 °C short term)
-
ClickLoc and FluidLoc technologies for connector reliability and moisture resistance
-
Interchangeable with legacy 7200 series systems
-
CE compliant and certified for hazardous environments
Technical Specifications
| Parameter | Value |
|---|---|
| Output Signal | 0.787 V/mm (20 mV/mil) nominal |
| Linear Range | 12.7 mm (500 mils) from 0.63 mm to 13.33 mm |
| System Length | 5.0 meters |
| Operating Temperature (Probe) | -35°C to +200°C |
| Short-term Temp. Tolerance | Up to 250°C (max 24 hours) |
| Operating Temp. (Proximitor) | -51°C to +100°C |
| Frequency Response | 0 to 2.7 kHz (+0, -3 dB typical) |
| Recommended Target Size | ≥61 mm (2.4 in) diameter |
| Environmental Resistance | 100% condensing humidity, IP rated with protected connectors |
| Total Weight | 0.255 kg (Proximitor Sensor only) |
| Probe Cable Length | 5.0 m |
| Mounting Type | DIN or panel mount |
| Material (Sensor Housing) | A380 aluminum |
| Compliance | CE, FCC, ATEX, IECEx, RoHS |
Frequently Asked Questions (FAQ)
Q1: What is the purpose of the 330850-51-05 sensor?
A1: It measures differential expansion in steam turbines by tracking relative axial movement between the rotor and stator.
Q2: What type of signal does the sensor output?
A2: It outputs 0.787 V/mm (20 mV/mil), which provides a linear response over its 12.7 mm range.
Q3: Can it replace older Bently Nevada 7200 series sensors?
A3: Yes, it is designed to be fully compatible as a drop-in replacement.
Q4: What’s the maximum temperature the probe can withstand?
A4: It operates up to 200°C continuously, with short-term tolerance up to 250°C.
Q5: How is the system installed on machinery?
A5: Using optional sliding brackets, the system can be mounted and adjusted for optimal alignment and measurement.
Q6: Is the sensor certified for hazardous areas?
A6: Yes, it has CSA, ATEX, and IECEx certifications for use in Class I/Zone 0 and Zone 2 hazardous locations.
Q7: How accurate is the sensor?
A7: It maintains a deviation from best-fit line within ±0.31 mm and remains within ±0.92 mm over extended temperature ranges.
Q8: Does it require any special tools for wiring?
A8: No, the SpringLoc terminal strips eliminate the need for special tools and make wiring easier.
Q9: What materials are used in the sensor’s construction?
A9: The probe is stainless steel with a PEEK tip, and the sensor housing is A380 aluminum.
Q10: Can this be used for ramp-type DE targets?
A10: Yes, it supports collar and ramp configurations for DE measurement.
Related Models (Same Series or Function)
| Model Number | Description | Output Signal | Probe Length | Total Weight |
|---|---|---|---|---|
| 330851-01-000-020 | 25 mm probe, threaded 1¼-12 | 20 mV/mil | 2.0 in | ~230 g |
| 330851-04-000-015 | Smooth rear exit probe, 1.06 in | 20 mV/mil | 1.5 in | ~230 g |
| 330850-91-05 | 9.0 m Proximitor Sensor, DIN mount | 20 mV/mil | 9.0 m | ~0.255 kg |
| 330854-040-24-00 | 4.0 m Extension Cable, High Temp | N/A | 4.0 m | ~180 g |
| 330854-080-24-00 | 8.0 m Extension Cable, High Temp | N/A | 8.0 m | ~360 g |
| 330853-01-01 | Sliding Bracket, Single DE, 1¼-12 Adapter | N/A | Adjustable | ~580 g |
Popular Bently Nevada Models
| Model Number | Description | Application | Weight | Mount Type |
|---|---|---|---|---|
| 330100-50-00 | 8 mm Proximity Probe | General Machinery Vibration Monitoring | ~85 g | Threaded |
| 330104-00-10-10-02 | 3300 XL Proximitor Sensor | Proximity Monitoring | ~250 g | Panel Mount |
| 330400 | Velomitor Piezo-Velocity Sensor | Vibration Monitoring | ~300 g | Stud Mount |
| 3500/42M | Proximitor Seismic Monitor | Shaft Vibration & Position | ~500 g | Rack Module |
| 330980-50-05 | High Temp Proximity Transducer System | Turbine Applications | ~280 g | DIN Mount |
| 146031-01 | TDI Module for 3500 System | Data Interface | ~400 g | Rack Mount |
