- Automation & ControlView all 1,842 products
- AC Drives
- PLC & I/O Cards
- Industrial Communications
- Vibration Monitoring
- Automation Accessories
- Controllers & Data Acquisition
- Isolator & Barrier
- CCTV & Security
- Safety Switches & Guard Locking
- Encoders
- HMI Displays
- Industrial Computers
- Servo Drives
- Motor Soft Starters
- Pneumatic Cylinders
- Machine Vision
- Automation Software
- Robotics
Brand: Bently Nevada
Bently Nevada 330100-50-00 3300 Proximitor Sensor, 5 m
Description
330100-50-00: 3300 Proximitor Sensor, 5.0 m system, no approvals
The Bently Nevada 330100-50-00 is a 3300 Proximitor Sensor (the non-XL generation) for a 5.0 m (16.4 ft) proximity transducer system. It conditions the signal from a 3300 5 mm, 3300 8 mm or 3300 XL 8 mm probe and extension cable into a dc-plus-ac voltage proportional to gap, for vibration and position channels on fluid-film bearing machines.
Decoded with the 330100-AXX-BXX table, 50 is the 5.0 m system length and 00 means agency approvals are not required.
| Segment | Code | Meaning (from the ordering table) |
|---|---|---|
| 330100 | 330100 | 3300 Proximitor Sensor |
| A: total length | 50 | 5.0 m (16.4 ft) system length |
| B: agency approval | 00 | Not required |
330100-50-00 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Bently Nevada 330100-50-00 |
| Product | 3300 Proximitor Sensor (non-XL), 5.0 m system |
| Agency approval option | 00 (not required) |
| Probe input | One non-contacting 3300 5 mm, 3300 8 mm or 3300 XL 8 mm probe with extension cable |
| Supply voltage | -17.5 to -26 Vdc at 12 mA maximum; a supply more positive than -23.5 Vdc can reduce linear range |
| Supply sensitivity | Less than 2 mV output change per volt of supply change |
| Output resistance | 50 Ω |
| Linear range | 2 mm (80 mils), from about 0.25 to 2.3 mm (10 to 90 mils) |
| Recommended gap | 1.27 mm (50 mils) |
| Incremental scale factor | 7.87 mV/µm (200 mV/mil) ±6.5% typical, including interchangeability error, in 0.25 mm steps |
| Deviation from best-fit line | Less than ±38 µm (±1.5 mil) typical |
| Frequency response | 0 to 6.5 kHz, +0/-3 dB, with up to 305 m of field wiring |
| Minimum target / shaft | 15.2 mm (0.6 in) flat target; shaft 50.8 mm (2 in) minimum, 76.2 mm (3 in) recommended |
| Field wiring | Three-conductor shielded triad recommended; 305 m (1,000 ft) maximum between sensor and monitor |
| Sensor temperature | Operating and storage -51 to +100 °C (-60 to +212 °F) |
| Humidity | 100% condensing, non-submersible when connectors are protected |
| Sensor weight | 255 g (9.0 oz); integral isolation plate as base |
Principle of the 330100-50-00
The sensor sends a radio-frequency drive to the coil in the probe tip and measures how a conducting target loads that coil. Its output is a negative dc voltage proportional to gap, 7.87 mV/µm (200 mV/mil), which carries both position (the dc level) and vibration (the ac component). The 330100 includes an integral isolation plate as its base, so no separate isolator plate is needed in the mounting.
330100-50-00 as a spare for installed 3300 systems
Because this is the earlier sensor generation, the usual reason to order a 330100-50-00 is to keep an existing 3300 channel running without changing cabling, mounting or monitor configuration. The sensor accepts the same probe and extension cable family as before and keeps the known 200 mV/mil scale factor.
The probe and extension lengths must total 5.0 m, as in the 3300 XL 8 mm range: for example a 1.0 m probe with 4.0 m extension, or a 5.0 m probe on its own. If the machine is being refurbished, the XL sensor 330180-50-00 is an alternative, but the manufacturer notes that mixing XL and non-XL components limits performance to the non-XL figures.
Related parts and family overview for 330100-50-00
The ordering table for the 3300 Proximitor Sensor has only two length codes, 50 and 90, and two agency codes, 00 and 05. Matching parts are the 3300 XL 8 mm probes (330101 to 330106 families), 3300 5 mm probes (330171, 330172) and the 3300 XL extension cable 330130. The XL Proximitor Sensor, 330180, is described as electrically and mechanically interchangeable with this non-XL sensor and recommended as best available technology, but mixing XL and non-XL parts limits performance to the non-XL specification.
| Part number | System length | Agency option |
|---|---|---|
| 330100-50-00 | 5.0 m (16.4 ft) | Not required |
| 330100-50-05 | 5.0 m (16.4 ft) | Multiple approvals |
| 330100-90-00 / 330100-90-05 | 9.0 m (29.5 ft) | Not required / multiple approvals |
Selection and ordering checklist for 330100-50-00
- Read the nameplate of the installed sensor and confirm it is 330100-xx-xx before ordering
- Confirm the 5.0 m total length and that the probe is a 3300 5 mm, 3300 8 mm or 3300 XL 8 mm type
- Confirm approvals are not required (otherwise 330100-50-05)
- Check whether an XL replacement is preferred and whether monitor settings change
- Confirm the supply is -24 Vdc nominal and within the allowed range
- Check for existing barriers, which change how supply voltage is set
Installation, commissioning and maintenance of the 330100-50-00
Mount the sensor on its isolating base in the same footprint as the unit being replaced, land the field wires and join the extension cable. The probe system is interchangeable, so no bench calibration is required, but the scale factor is set to AISI 4140 steel unless ordered otherwise.
Verify after replacement by measuring gap voltage at the monitor, which should sit near the original value, and by performing a simple shaft movement test.
- Store spare sensors dry and away from vibration
- Record the original gap voltage before replacement
- Keep tip-to-tip probe spacing at about 40 mm axial and 74 mm radial for the non-XL system to hold cross-talk down
- Connector-to-connector torque is finger tight; do not use tools on XL gold connectors
- Probe and cable must not be pulled beyond rated tensile strength
Typical applications in Oman and the GCC
In Oman and the GCC the 330100-50-00 is mostly encountered as a maintenance spare on 3300-based machinery protection systems in oil and gas plants, power stations, desalination units and petrochemical facilities. These plants often run original 3300 channels installed years ago, and keeping the same sensor model avoids loop re-engineering.
Information to send with an RFQ for 330100-50-00
- Part number 330100-50-00 and quantity
- Nameplate photo of the installed sensor
- Probe model and extension cable length
- Monitor or system type
- Delivery location in Oman or the GCC and required date
Documents and quotation
Send the part number 330100-50-00 and we will confirm which manufacturer documents are available for it.
Ask us whether the 3300 XL 8 mm datasheet, which covers the electrically interchangeable XL sensor, would be useful for reference. Seven Star LLC is an independent supplier based in Muscat; submit the part number, quantity and delivery location and we reply with availability and a quotation.
Other Models in the 3300 Proximitor 330100 Range
Seven Star LLC supplies models from the 3300 Proximitor 330100 range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Bently Nevada 330100-50-00 3300 Proximitor Sensor, 5 m | Vibration Monitoring | You are viewing this model |
| Bently Nevada 330100-50-05 3300 Proximitor Prox, 5 m, Approvals | Vibration Monitoring | View details |
Datasheets & Documents
- Datasheet Bently Nevada 3300 Proximity Transducer System Specifications and Ordering Information (141605-01) Download
Reviews (0)
About brand
Bently Nevada is the American machinery protection and condition monitoring brand behind the 3500 rack, the 3300 XL proximity probe and the System 1 software. It was founded in 1961 in Minden, Nevada, and is today a Baker Hughes business.
Seven Star LLC is an independent supplier in Muscat. We list Bently Nevada monitors, I/O modules, probes, proximitors, velocity transducers and transmitters for rotating equipment in Oman and the GCC, and source them by full part number.
Bently Nevada company profile
| Established | 1961, Minden, Nevada, USA, by Donald E. Bently. The business started earlier as Bently Scientific in Berkeley, California (1956). |
|---|---|
| Known for | The first commercial eddy-current proximity transducers for measuring shaft vibration and position on high-speed turbomachinery |
| Ownership | Acquired by GE Energy in 2002; part of Baker Hughes since GE Oil & Gas combined with Baker Hughes in 2017 |
| Rack generations | 5000 series (from 1965), 3300 series (from 1988), 3500 series (from 1995), Orbit 60 (current platform) |
| Product families | Machinery protection racks, proximity probes and proximitors, Keyphasor sensors, velocity and acceleration transducers, 2-wire vibration transmitters, general-purpose monitors, portable analyzers, wireless sensors and System 1 condition monitoring software |
| Typical machines | Steam and gas turbines, centrifugal and reciprocating compressors, pumps, motors, generators, fans and gearboxes |
Milestones
- 1956: Donald E. Bently starts Bently Scientific in Berkeley, California.
- 1961: The company moves to Minden, Nevada, as Bently Nevada.
- 1965: The 5000 series monitoring system is introduced.
- 1988: The 3300 series follows.
- 1995: The 3500 machinery protection system is launched.
- 2002 and 2017: GE Energy acquires Bently Nevada; it becomes part of Baker Hughes in 2017.
Bently Nevada product series
| Series | Type | What it does |
|---|---|---|
| 3500 | Machinery protection rack | Continuous online protection with alarm and danger relays. Modules include the 3500/15 power supply, 3500/20 rack interface, 3500/25 Keyphasor, 3500/42M proximitor/seismic, 3500/50 tachometer, 3500/60 temperature, 3500/33 relay and 3500/92 communication gateway |
| 3500 recip modules | Reciprocating compressor monitoring | 3500/70M impulse velocity, 3500/72M rod position and 3500/77M cylinder pressure |
| Orbit 60 | Protection and monitoring platform | The current Bently Nevada platform for protection, condition monitoring and data integration with System 1 |
| 3300 XL 8 mm | Proximity transducer system | Probe, extension cable and proximitor sensor for radial vibration, thrust position and Keyphasor reference on fluid-film bearing machines; also 5 mm and 25 mm versions |
| 330500 Velomitor, 190501 Velomitor CT | Piezo-velocity sensors | Casing velocity on rolling-element bearing machines and low-speed cooling tower fans |
| 990 and 991 | 2-wire transmitters | 4-20 mA vibration (990) and thrust position (991) signals straight into a PLC or DCS, without a monitor rack |
| 1900/65A, 2300 | Compact monitors | Protection for balance-of-plant pumps, fans and motors where a full 3500 rack is not justified |
A proximity probe measures the gap to the shaft, so it sees shaft movement inside a fluid-film bearing directly. A velocity or acceleration sensor sits on the casing and suits rolling-element bearing machines. Critical turbomachinery usually carries two X-Y probes per bearing, two axial probes for thrust position and a Keyphasor probe for speed and phase.
Where Bently Nevada systems are used
In Oman and the GCC, Bently Nevada racks and probes protect gas turbines, compressors and steam turbines in gas processing, LNG, refining, petrochemical, power and desalination plants. Many installations are 3500 racks that have run for years, so most requests are for like-for-like module, probe, extension cable and proximitor replacements, plus upgrades to newer monitors.
Ordering and replacement: what we need
For probes and proximitors, send the full part number with all option digits (for example 330101-00-27-10-02-05). The digits set the probe length, cable length, connector and approvals, and the probe, cable and proximitor must match in total system length. For 3500 modules, send the module and I/O part numbers from the rack and say whether the I/O is internal or external termination, or barrier type. If a module is obsolete, we quote the replacement that Bently Nevada names and point out any configuration or firmware change.
Facts checked against Baker Hughes Bently Nevada pages and published company history, October 2026.
Browse Bently Nevada products by category: Vibration.
FAQ
Questions about the Bently Nevada 330100-50-00 3300 Proximitor Sensor,
Answers from our engineering team on installation, compatibility and integration.
01What does 330100-50-00 mean?
It follows the 330100-AXX-BXX pattern. A = 50 means 5.0 m system length; B = 00 means agency approval not required.
02Is the 330100-50-00 the same as the 330180-50-00?
No. The 330100 is the non-XL 3300 Proximitor Sensor; the 330180 is the 3300 XL version, which the manufacturer lists as electrically and mechanically interchangeable but with better performance.
03Which probes work with the 330100-50-00?
The sensor accepts one 3300 5 mm, 3300 8 mm or 3300 XL 8 mm probe with extension cable, with total system length 5.0 m.
04What are the range and scale factor?
The linear range is 2 mm (80 mils), from 0.25 to 2.3 mm, with an incremental scale factor of 7.87 mV/µm (200 mV/mil) ±6.5% typical.
05What supply does it need?
-17.5 to -26 Vdc at a maximum of 12 mA. Operation more positive than -23.5 Vdc can reduce the linear range.
Reviews
There are no reviews yet.