Brand: Bently Nevada

Bently Nevada 330780-50-00 3300 XL 11 mm Proximitor, 5 m Panel

Name: Bently Nevada 330780-50-00 3300 XL 11 mm Proximitor 5m Panel
Brand: Bently Nevada
SKU: 330780-50-00

Description

330780-50-00: 3300 XL 11 mm Proximitor Sensor, 5.0 m system, panel mount

The Bently Nevada 330780-50-00 is the 5.0 m (16.4 ft), four-hole panel-mount version of the 3300 XL 11 mm Proximitor Sensor, with no agency approval option. It conditions the signal from an 11 mm probe and extension cable and is the usual choice when an existing backplate or enclosure already carries the panel hole pattern.

Under the 330780-AA-BB ordering table, 50 is the 5.0 m panel-mount system and 00 is not required for agency approval.

Segment	Code	Meaning (from the ordering table)
330780	330780	3300 XL 11 mm Proximitor Sensor
A: total length and mounting	50	5.0 m system length, panel mount
B: agency approval	00	Not required

330780-50-00 technical specifications

Parameter	Specification
Manufacturer / part number	Bently Nevada 330780-50-00
Product	3300 XL 11 mm Proximitor Sensor
System length / mounting	5.0 m (16.4 ft) including extension cable; panel mount
Agency approval option	00 (not required)
Probe input	One non-contacting 3300 XL 11 mm probe with extension cable
Supply voltage	-17.5 to -26 Vdc at 12 mA maximum without barriers; -23 to -26 Vdc with barriers
Supply sensitivity	Less than 2 mV output change per volt of supply change
Output resistance	50 Ω
Linear range	4.0 mm (160 mils), from about 0.5 to 4.5 mm (20 to 180 mils), roughly -1 to -17 Vdc
Extended linear range	About 0.5 to 5.0 mm (20 to 200 mils), -1 to -19 Vdc; not applicable with zener barriers
Recommended gap	2.5 mm (100 mils)
Incremental scale factor	3.94 V/mm (100 mV/mil) ±10% including interchangeability error, in 0.5 mm (20 mil) steps over the 4.0 mm range
Deviation from best-fit line	Less than ±0.10 mm (±4 mils) standard range; less than ±0.15 mm (±6 mils) extended range
Frequency response	0 to 8 kHz, +0/-3 dB typical, with up to 305 m of field wiring
Field wiring	0.2 to 1.5 mm² (16 to 24 AWG), three-conductor shielded triad recommended, up to 305 m (1,000 ft)
Target size	Flat target 30.5 mm (1.2 in) minimum diameter; shaft 152 mm (6.0 in) recommended minimum
Sensor operating temperature	-52 to +100 °C (-62 to +212 °F); storage -52 to +105 °C
Humidity	100% condensing, non-submersible when connectors are protected; damp heat tested to IEC 68-2-3
Sensor material and weight	A380 aluminum; 255 g (9 oz)

How the 330780-50-00 scales gap into voltage

The 3300 XL 11 mm Proximitor Sensor excites the large 11 mm probe coil with a radio-frequency signal and converts the damping caused by the target into a negative dc voltage. Because the tip is bigger, the output is 3.94 V/mm (100 mV/mil) instead of 7.87 V/mm, and the linear range stretches to 4.0 mm (160 mils) compared with 2 mm on the 8 mm system. The datasheet describes the dc part as position and the ac part as vibration up to 8 kHz.

330780-50-00 on a panel mount: practical points

A panel mount uses four 6-32 UNC thread-forming screws (04310310, supplied with 3300 XL panel-mount housings) and the base is isolated, which avoids a separate isolator plate. A replacement panel mounting pad is listed as 138492-01.

Because the system length is 5.0 m, the combination of probe and extension must equal 5.0 m. A 1.0 m probe with a 4.0 m 330730 extension is the usual build, while a 5.0 m probe works with no extension. The datasheet mentions 330701-00-10-10-02-00 and 330701-00-20-10-02-00 among commonly stocked probes.

Related parts and family overview for 330780-50-00

Direct siblings are 330780-51-00 (5.0 m DIN), 330780-90-00 (9.0 m panel), 330780-91-00 (9.0 m DIN) and 330780-91-05 (9.0 m DIN with multiple approvals). The ordering table for the 330780 sensor offers six length and mounting codes (50, 51, 52, 90, 91, 92) and two approval codes (00 and 05). Codes 52 and 92 are the versions supplied without mounting hardware. The sensors shown below are the ones commonly requested.

Part number	System length	Mounting	Approval option
330780-50-00	5.0 m (16.4 ft)	Panel mount	None
330780-51-00	5.0 m (16.4 ft)	DIN mount	None
330780-90-00	9.0 m (29.5 ft)	Panel mount	None
330780-91-00	9.0 m (29.5 ft)	DIN mount	None
330780-91-05	9.0 m (29.5 ft)	DIN mount	Multiple approvals (05)

Selection and ordering checklist for 330780-50-00

Confirm panel mounting and four-hole backplate in the enclosure
Confirm 5.0 m total system length
Choose a probe case thread and armor option
Confirm the approval option (00 here, no approval)
Check the supply is -17.5 to -26 Vdc, at most 12 mA
Confirm the monitor range matches 3.94 V/mm

Installation, commissioning and maintenance of the 330780-50-00

Fix the sensor with four screws, land the field wires in the SpringLoc strip and connect the cable ends. The sensor body does not need an external insulator plate because the mounting base is isolated.

Set the gap around 2.5 mm (100 mils), verify with a slow shaft movement, and log the gap voltage. The 3500 configuration software lists the 3300 XL 11 mm system as an option only in updated versions, so check the monitor software revision before commissioning.

Test pin adapters 01609137 and 01609138 allow BNC checks at the terminal strip
Keep a spare sensor; one part covers all 5 m panel-mount 11 mm channels
Silicone tape is not recommended where turbine oil may reach the joint
Check connector protectors during outages
Mount away from high-temperature surfaces: sensor limit is +100 °C

Typical applications in Oman and the GCC

In Oman and the GCC the 330780-50-00 is commonly found on compressor thrust position, steam turbine differential expansion ramps and reciprocating compressor rod position at oil and gas, power and petrochemical sites. A panel-mount sensor in a field junction box or machine-side enclosure is easy to swap during turnaround without disturbing the rail layout.

Information to send with an RFQ for 330780-50-00

Part number 330780-50-00 and quantity
Probe model and extension cable for the 5.0 m total
Measurement duty and machine type
Enclosure or backplate details if retrofitting
Delivery location in Oman or the GCC and required date

Documents and quotation

The manufacturer datasheet for the 330780-50-00 is attached on this page under Documents, so wiring, ordering options and environmental limits can be checked before you order.

Mounting screws and replacement pads are listed in the datasheet accessory table. 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 3300xl Proximitor 11mm Range

Seven Star LLC supplies models from the 3300xl Proximitor 11mm 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 330780-91-00 3300 XL 11 mm Proximitor, 9 m DIN	Vibration Monitoring	View details
Bently Nevada 330780-51-00 3300 XL 11 mm Proximitor, 5 m DIN	Vibration Monitoring	View details
Bently Nevada 330780-50-00 3300 XL 11 mm Proximitor, 5 m Panel	Vibration Monitoring	You are viewing this model

Datasheets & Documents

Datasheet Bently Nevada 330780-50-00 Datasheet Download

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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 330780-50-00 3300 XL 11 mm

Answers from our engineering team on installation, compatibility and integration.

01What does 330780-50-00 mean?

It follows the 330780-AA-BB pattern. Code 50 selects a 5.0 m system with panel mount, and 00 means no agency approval option.

02How is the panel version mounted?

With four 6-32 UNC thread-forming screws (04310310). A replacement panel-mount pad is listed as 138492-01 and the base is isolated.

03What are the system accuracy figures?

The scale factor is 3.94 V/mm (100 mV/mil) ±10%, with best-fit-line deviation under ±0.10 mm (±4 mils) over the standard range.

04Is the extended range available?

An extended linear range of about 0.5 to 5.0 mm exists, but the datasheet states it does not apply when zener barriers are used.

05What temperature can the sensor take?

Operating -52 to +100 °C and storage -52 to +105 °C for the Proximitor Sensor itself.