Brand: Bently Nevada

Bently Nevada 330780-91-00 3300 XL 11 mm Proximitor, 9 m DIN

Name: Bently Nevada 330780-91-00 3300 XL 11 mm Proximitor, 9 m DIN
Brand: Bently Nevada
SKU: 330780-91-00

Description

330780-91-00: 3300 XL 11 mm Proximitor Sensor, 9.0 m system, DIN mount

The Bently Nevada 330780-91-00 is the 3300 XL 11 mm Proximitor Sensor in the 9.0 m (29.5 ft) system length, prepared for DIN-rail mounting, without an agency approval option. It is the conditioning unit for the large-tip 11 mm eddy-current probe and its extension cable, and it supplies the long linear range needed on thrust position, rod position and similar measurements.

Reading the number as 330780-AA-BB, the code 91 means 9.0 m system length with DIN mount and the final 00 means that no agency approvals are required.

Segment	Code	Meaning (from the ordering table)
330780	330780	3300 XL 11 mm Proximitor Sensor
A: total length and mounting	91	9.0 m system length, DIN-rail mount
B: agency approval	00	Not required

330780-91-00 technical specifications

Parameter	Specification
Manufacturer / part number	Bently Nevada 330780-91-00
Product	3300 XL 11 mm Proximitor Sensor
System length / mounting	9.0 m (29.5 ft) including extension cable; DIN-rail 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 330780-91-00 handles a long linear range

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.

330780-91-00: why a 9.0 m DIN system is chosen

Choose this part when the sensor must sit well away from the machine, in a DIN-rail cabinet or junction box, while an 11 mm probe still reaches a thrust collar or compressor rod. The 9.0 m total includes the extension cable, so a 1.0 m probe takes the 8.0 m extension (330730 code 080), or a 9.0 m probe is used alone. Five-metre probes are meant only for 5 m sensors.

The DIN version shares the thin body that lets many sensors share one rail, and the SpringLoc terminals accept field wire without special tools. On the 9 m system the ASF and DSL tolerances quoted in the datasheet apply to the whole chain, so do not substitute probes or cables from other families.

Related parts and family overview for 330780-91-00

Siblings are 330780-50-00, 330780-51-00, 330780-90-00 and 330780-91-05. The matching probes are 330701/330702 (1/2-20 UNF), 330703/330704 (M14 x 1.5), 330707/330708 (5/8-18 UNF), 330709/330710 (M16 x 1.5) and the reverse-mount 330705/330706, with extension cable 330730. 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 330780-91-00

Confirm the probe is a 3300 XL 11 mm type with 1.0 m or 9.0 m length (not 5.0 m)
Confirm the extension cable is 330730 with 8.0 m if the probe is 1.0 m
Confirm DIN-rail mounting; panel mounting uses 330780-90-00
Confirm no hazardous-area approval is needed (option 05 is separate)
Check the monitor channel is set for 100 mV/mil (3.94 V/mm)
Confirm the target diameter is at least 30.5 mm and the shaft is large enough

Installation, commissioning and maintenance of the 330780-91-00

Clip the sensor to the rail, wire the supply, common and signal in the SpringLoc strip and join the ClickLoc connectors hand-tight. Connector protectors are recommended on every install, and silicone tape is included with each extension cable as an alternative where oil exposure is not expected.

For thrust position, set the gap near the recommended 2.5 mm (100 mils) at mid-travel, then move the shaft and confirm the output follows 3.94 V/mm. When using a 3500 monitor, the datasheet notes an updated configuration software version lists the 3300 XL 11 mm system as a compatible option.

Keep probe-to-probe separation of at least 64 mm for axial and 58 mm for radial positions on a 76.2 mm shaft to hold cross-talk below 50 mV
Replacement DIN-mount mounting pad is 138493-01
Use the test pin adapters 01609137 and 01609138 with the 40971-04 cable for checks at the terminal strip
Record gap voltage at commissioning for trending
Do not mix sensors from other probe families on an 11 mm probe

Typical applications in Oman and the GCC

The 330780-91-00 fits large compressors, steam turbines and reciprocating machines in Oman and the GCC where thrust position, ramp differential expansion or rod drop is needed. In gas gathering plants, power stations and desalination blocks the long run to a cabinet in a cooled room is common, which makes a 9 m DIN-rail unit attractive. Only the probe and extension cable have to survive the machine environment, while the sensor itself stays in the cabinet.

Information to send with an RFQ for 330780-91-00

Part number 330780-91-00 and quantity
Probe part number and extension cable length (total 9.0 m)
Measurement type: thrust, differential expansion, rod position or keyphasor
Target material if not AISI 4140 steel
Delivery location in Oman or the GCC and required date

Documents and quotation

The manufacturer datasheet for the 330780-91-00 is attached on this page under Documents, so wiring, ordering options and environmental limits can be checked before you order.

The datasheet also lists the 146255 user guide and the 144979 performance specification, which can be requested through us for installation planning. 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.

Datasheets & Documents

Datasheet Bently Nevada 330780-91-00 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 330780-91-00 3300 XL 11 mm

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

01What does 330780-91-00 mean?

It follows the 330780-AA-BB pattern. Code 91 means 9.0 m system length with DIN-rail mounting, and 00 means no agency approval option.

02What is the output of the 330780-91-00?

The output is 3.94 V/mm (100 mV/mil) ±10% over a 4.0 mm (160 mil) linear range, with a recommended gap of 2.5 mm (100 mils).

03Which probe and cable length work with a 9 m sensor?

Probe plus 330730 extension cable must total 9.0 m, for example a 1.0 m probe with an 8.0 m extension, or a 9.0 m probe. Five-metre probes are only for the 5 m sensor.

04What are the power requirements?

It needs -17.5 to -26 Vdc at 12 mA maximum without barriers. With barriers use -23 to -26 Vdc, since the extended range does not apply with zener barriers.

05What applications is the 11 mm system used for?

The datasheet lists axial thrust position, ramp differential expansion on steam turbines, rod position on reciprocating compressors, tachometer and zero speed and Keyphasor signals.