3300 XL High Temperature Proximity
SystemDatasheet

Bently Nevada Machinery Condition Monitoring

141623 Rev. G

Description
Gas and steam turbines can produce temperatures hotenough to damage or destroy conventional proximity
probes. The 3300 High Temperature Proximity System (HTPS)
is designed to withstand the extreme temperatures foundinside gas turbines, steam turbines and other types ofrotating machinery. The HTPS measures vibration, thrustposition, differential expansion and other parameters inside
the hot areas of these machines. High temperature
installations include:llllllll

Near a labyrinth seal in steam turbines
Differential expansion in steam turbines
When probe cables are routed through struts that
support the bearing housing of a gas turbine
When probe cables are routed out through the exhaust
path of a gas turbine
Monitoring a troublesome bearing in a hightemperature area
Mode shape analysis at the mid-span location on
steam and gas turbines for online machinery
diagnostics
Interstage radial and axial seal clearance
measurements at the mid-span location of multistage steam turbines to minimize seal rubs
Most hot bearing locations that can destroy
conventional proximity probes

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

High temperature transducer witha rugged designtemperature environments. It is a viable option
for your most challenging test problems.
The Bently Nevada 3300 XL High Temperature
Proximity System is an advanced transducer
designed for making proximity measurements
at hot bearing locations in your machine. Thistransducer delivers dependable service insevere environments and is an ideal solution
when using proximity probes at elevatedtemperatures.

The 3300 XL High Temperature Proximity System
can be used for proximity measurements athot locations with excellent results. Customer
benefits include:
lllllll

Proximity probe with integral hardline
cable rated for +350°C (+662°F)
continuous service in extreme conditions
4 mm (160 mils) of linear range for mostmeasurements in the hot sections of themachine
Hermetically-sealed ceramic probe tip
seals out moisture and contaminants foradded durability
Ceramic tip and stainless steel
construction resists heat, moisture andcorrosion
Threaded and smooth case styles forvarious types of probe mounting
Hardline cable available in lengths of 1, 2and 5 metres for routing cable throughhot sections of the machine
3.94 V/mm (100 mV/mil) signal output
compatible with virtually all new andexisting Bently Nevada monitors anddiagnostic equipment

Because of its thick hardline cable, the HTPS
probe can be difficult to gap using a traditional
threaded probe and bracket. Therefore, we
recommend using smooth case probes,
particularly if ordering a longer (2-metre or 5metre) probe. The smooth case probes comewith a clamp style mounting bracket to allow
the probe to be gapped without turning.

Mode shape analysis
The 3300 XL High Temperature Proximity System
is used to protect and manage criticalmachines in your facility for increased safetyand efficiency. It is also used for mode shapeanalysis when measurements are taken at theturbine mid-span location. Mode shapeanalysis is important for research anddevelopment of a new steam or gas turbine
design or when troubleshooting an existing
design. Mode identification probes provide
lateral mode shape information which isextremely valuable for balancing rotatingmachinery and identifying faults such as shaft
cracks, bearing failures, rotor-to-stator rubs
and other machine problems.
For test and measurement applications, theHTPS will meet or exceed most requirements formaking proximity measurements in high2/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Extension Cable dc ResistanceSpecifications
Unless otherwise noted, the following
specifications are for a a 3300 XL 16 mm HTPS
Proximitor Sensor, matched extension cableand probe at 22 +4.4°C (72 +8°F) at a maximum
altitude of 2000m, with a -24 Vdc power supply,
a 10 kΩ load, a Bently Nevada supplied AISI 4140steel target that is 31 mm (1.2 in) diameter orlarger, and a probe gap of 2.5 mm (100 mils).
The system accuracy and interchangeability
specifications do not apply when using atransducer system calibrated to any target
other than a Bently Nevada AISI 4140 steeltarget.

Length ofExtension
Cable (m)(ohms)

Electrical
Proximitor
SensorInput

Accepts one noncontacting
3300 XL HTPS 16 mm Proximity
Probe with matched Extension
Cable.

PowerRequires -19.6 Vdc to -26 Vdc at12 mA maximum consumption.
Operation at a more positive
voltage than -23.5 Vdc canresult in reduced linear range.

SupplySensitivity

Less than 13 mV change in
output voltage per volt changein input voltage.

Outputresistance50 Ω

Probe dc Resistance
Probe
Length (m)Resistance from the Center
Conductor to the Outer
Conductor (RpROBE) (°hms)

1.0

5.06

2.0

5.82

5.0

8.11

Resistancefrom
CoaxialResistance fromCenterConductor Conductor
toto Center
CoaxialConductor
Conductor(RCORE) (ohms)(rjacket)

3/22

4.0

0.88

0.26

7.0

1.62

0.498.0

1.840.55

Extension cablecapacitance

69.9 pF/m (21.3 pF/ft)
typicalField wiring

Maximum length of
305 metres (1,000 feet)between the 3300 XLHTPS Proximitor
Sensor and themonitor. See thefrequency responsegraph for signal rolloff
at high frequencies
when using longer
field wiring lengths.

Linear Range

4.0 mm (160 mils).
Linear range begins atapproximately 0.5mm (20 mils) fromtarget and is from 0.5
to 4.5 mm (20 to 180mils) (approximately-2 to -18 Vdc).

Recommended Gap
Setting

2.5 mm (100 mils)

3300 XL High Temperature Proximity System
Datasheet

Incremental Scale
Factor (ISF)

3.94 V/mm (100mV/mil) ±9.65%
includinginterchangeabilityerror when measured
in increments of 0.5mm (20 mils) over the4.0 mm (160 mil) linear
range.

Deviation from best fit
straight line (DSL)

Less than ±78 |xm(±3.1 mils).

System performanceover extended
temperatures

Over a probe
temperature range of
22oCto+350°C(72oFto+662oF) the ISF
remains within ±30%
of 3.94 V/mm (100mV/mil), the DSL
remains within ±0.51
mm (±20 mils).

Frequency Response

0 to 6 kHz: +0, -3 dB
typical, with up to 305
metres (1000 feet) of
field wiring.

Recommended
Minimum Target Size

30.5 mm (1.2 in)diameter (flat target)

Recommended
Minimum Shaft
Diameter

152 mm (6.0 in)

141623 Rev. G

Measurements on shaft diameters
smaller than 76 mm (3.0 in) usuallyrequire close spacing of radialvibration or axial positiontransducers with the potential for
their electromagnetic emitted fields
to interact with one another (crosstalk), resulting in erroneous
readings. Care should be taken to
maintain minimum separation oftransducer tips, generally at least 64mm (2.5 in) for dual axial position
measurements or 54 mm (2.1 in) forradial vibration measurements toprevent cross talk. Radial vibrationor position measurements on shaft
diameters smaller than 152 mm (6.0in) will generally result in a change
in scale factor due to the curvatureof the shaft surface. Consult
Performance Specification 159132 foradditional information.

Effects of 60 Hz Magnetic Fields Up to 300
Gauss
Output voltage in mil pp/gauss
Gap

ProximitorProbeSensor

Ext. Cable

0.5 mm(20 mil)0.0020

0.00300.0011

2.5 mm(100 mil)

0.00420.00340.0046

4.5 mm(180 mil)

0.00960.00700.0157

ElectricalClassification

4/22

Complies with theEuropean CE mark.

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

MechanicalProbe

117 g/m (1.26 oz/ft) ofhardline cable + 12 g/cm
(1.07 oz/in) of case

ExtensionCable

45 g/m (0.5 oz/ft)

Probe Tip
Material

Ceramic

Probe Case
Material

AISI 316L stainless steel (SST).

Probe Cable

1, 2 or 5 metre length of AISI
304L SST hardline cable.

ArmoredExtension
Cable

140 g/m (1.5 oz/ft)

Extension
Cable Material

75 Q triaxial, fluoroethylene
propylene (FEP) insulated.

Proximitor
Sensor

255 g (9 oz)

Proximitor
Aluminum with epoxy
Sensor Material powder coat finish.
System Length

Environmental Limit:

9 metres including extension
cable

Extension
Cable Armor(optional)

Flexible AISI 302 SST with FEP
outer jacket.

TensileStrength(maximumrated)

289 N (65 pounds) probe toextension cable.

Connector
material

Stainless steel

Probe casetorque(maximumrated)

81 N.m (720 in.lb)

Probe Temperature Range
Operating-34°C to+350°C (-30°F toand Storage+662°F)
Temperature
Extension Cable Temperature Range
Operatingand Storage 52°C to +177°C (-60°F to +351 °F)
Temperature
Proximitor Sensor Temperature Range-52°C to +100°C (-60°F toOperating+212°F)
Temperature
Storage-52° C to +105°C (-60°F toTemperature +221°F)

Connector-to-connector Torque
Recommended
Finger tight + 1/8 turntorqueMaximum
torque0.565 N.m (5 in.lb)

Minimum Bend
Radius (with orwithout SSTarmor)

25.4 mm (1.0 in)

System Weight (typicaI)5/22

Probe
Relative
Humidity

100% condensing, submersible
when connectors areprotected.

Extension
Cable andProximitor
SensorRelative
Humidity

100% condensing, nonsubmerged when connectors
are protected.

3300 XL High Temperature Proximity System
Datasheet

Probe
Pressure

141623 Rev. G

3300 XL High Temperature
Probes are designed to sealdifferential pressure between
the probe tip and case. Probes
are not pressure tested prior toshipment. Contact our custom
design department if you
require a test of the pressure
seal for your application.

It is the responsibility of the customer
or user to ensure that all liquids andgases are contained and safely
controlled should leakage occur froma proximity probe. In addition,
solutions with high or low pH values
may erode the tip assembly of theprobe causing media leakage into
surrounding areas. Bently Nevada
does not be held responsible for any
damages resulting from leaking 3300
high temperature proximity probes. Inaddition, 3300 XL High Temperature
Proximity probes will not be replaced
under the service plan due to probeleakage.

6/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Compliance andCertifications
FCC
This device complies with part 15 of theFCC Rules. Operation is subject to thefollowing two conditions:llThis device may not cause harmfulinterference.
This device must accept any
interference received, includinginterference that may cause
undesired operation.

RoHS
RoHS Directive 2011/65/EU

7/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G50

Ordering Information

D: Total Length Option:

For the detailed listing of country andproduct specific approvals, refer tothe Approvals Quick Reference Guide(108M1756) available from Bently.com.

Note: Extension cable is included
with the proximity probe.
903300 XL High Temperature Probe,
3/4-16 UNF threads

A: Unthreaded Length Option

Length configurations

0.0 inExample012 = 1.2 in

B: Overall Case Length Option:
Order in increments of 0.1 inThreaded length configurations
Maximum caselength6.5 inMinimum caselength1.1 inExample0 6 0 = 6.0 in

C: Hardline Length Option:10

1.0 metre (3.3 feet)20

2.0 metres (6.6 feet)

Without stainless steelarmor

01

With stainless steel armor

00

Order in increments of 0.1 in

Minimumunthreaded
length00

F: Agency Approval Option:

Unthreaded length must be at least
1.1 inch less than the case length.

5.4 in9.0 metres (30 feet)

E: Extension Cable Armor Option:

330301-AAA-BBB-CC-DD-EE-FF

Maximum
unthreaded
length

5.0 metres (16.4 feet)

8/22

Not required

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. G

3300 XL High Temperature Probe,
M18 x 1.5 threads

E: Extension Cable Armor Option:
00

Without stainless steel armor

330302-AAA-BBB-CC-DD-EE-FF

01

With stainless steel armor

F: Agency Approval Option:

A: Unthreaded Length Option:

00

Unthreaded length must be at least
30 mm less than the case length.
Order in increments of 10 mm
Length configurations
Maximum
unthreaded 130mm
lengthMinimum
unthreaded 0.0 mm
lengthExample050 = 50 mm

B: Overall Case Length Option:
Order in increments of 10 mm
Threaded length configurations
Maximumcase length

160 mmMinimumcase length

30 mm

Example130 = 130 mm

C: Hardline Length Option:10

1.0 metre (3.3 feet)20

2.0 metres (6.6 feet)50

5.0 metres (16.4 feet)

D: Total Length Option:
Extension cable is included with theproximity probe.
90

9.0 metres (30 feet)

9/22

Not required

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. G

3300 XL High Temperature Probe,
Smooth Case

3300 XL 16mm High Temperature
Proximitor Sensor

330303-AAA- BB-CC-DD-EE

330380-AA-BB (replaced 330300)

A: Overall Case Length Option:

A: Total Length and Mounting Option

Mounting bracket is included withthe proximity probe.
Order in increments of 0.1 in (2.54 mm)

9 meter, panel mount91

9 meter, DIN mount92

9 meter, no mounting hardware

B: Agency Approval

Threaded length configurations

00

Maximum
9.9 in (251.5 mm)case length

Not required

Accessories

Minimum
0.6 in (15.2 mm)case length
Example900 6 0 = 6.0 in (152.4 mm)

B: Hardline Length Option:

125M6030

3300 XL 16mm High Temperature
Proximity System User Guide

159132

Performance Specification
Mounting bracket for 330303
smooth case probe (spare).

10

1.0 metre (3.3 feet)

134835-01

20

2.0 metres (6.6 feet)50

5.0 metres (16.4 feet)

Spare Extension Cable
330330-AAA-BB-CC

C: Total Length Option:

A: Cable Length Option:

Extension cable is included with theproximity probe.
90

The 3300 XL 16 mm HTPS extension
cable is matched to the probe. If you
lose or damage an extension cable,a replacement cable can betrimmed to the same capacitanceas the original. A probe serial
number will be required whenordering a spare extension cable formatching.

9.0 metres (30 feet)

D: Extension Cable Armor Option:
00

Without stainless steel armor

01

With stainless steel armor

E: Agency Approval Option:
00

Not required040

4.0 metres (13.1 feet)070

7.0 metres (23.0 feet)080

8.0 metres (26.3 feet)

B: Armor Option:

10/22

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. G00

Without stainless steel armor

Field Wiring Cable

01

With stainless steel armor

132501-AA

C: Agency Approval Option:00

1.0 mm2 (18 AWG), 3 conductor twisted,shielded cable for connections between
Proximitor sensor and monitor. Terminal ringlugs are installed at each end, including an
extra shield ring lug at the monitor end.

Not requiredArmor Length
Cable
LengthOptionArmor Length ±0.05 m (0.17 ft)

040

1.9 metres (6.25 ft)

070

5.6 metres (18.4 ft)

080

6.6 metres (21.7 ft)

A: Cable Length Option in Feet:
Order in increments of 1.0 foot (0.3 metres)

11/22

Minimumlength2 feet (0.6 metres)

Maximumlength99 feet (30 metres)

Example15 = 15 feet (4.6 metres)3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Graphs and Figures

Figure 1: Typical 3300 XL HTPS Performance with System at High Temperature

12/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. GFigure 2: Typical 3300 XL HTPS Performance with System at Low Temperature

13/22

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. GFigure 3: Typical 3300 XL HTPS Performance with Probe at High Temperature

14/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Figure 4: Typical 3300 XL HTPS Performance with Proximitor Sensor at High Temperature

15/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. GFigure 5: Typical 3300 XL HTPS Performance with Proximitor Sensor at Low Temperature

16/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. GFigure 6: Typical 3300 XL HTPS Amplitude Frequency Response with Cable Attached

Figure 7: Typical 3300 XL HTPS Phase Frequency Response with Cable Attached17/22

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. GFigure 8: 330301 and 330302 HTPS Probe, English and Metric Threaded Versions

Figure 9: 330303 HTPS Smooth Case Probe

18/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. GFigure 10: Mounting Clamp for 330303 Smooth Case Probe

19/22

3300 XL High Temperature Proximity SystemDatasheet

141623 Rev. G

Figure 11: 330380 HTPS Proximitor Sensor (see drawing of same number)

Figure 12: Spare Extension Cable, Part Number 330330

20/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Notes:
1. All dimensions on figures are in millimetres (inches) unless otherwise noted.
2. Letters inside quotation marks on figures refer to probe ordering options.
3. Stainless steel armor is supplied with FEP outer jacket.

21/22

3300 XL High Temperature Proximity System
Datasheet

141623 Rev. G

Copyright 2022 Baker Hughes Company. All rights reserved.

Bently Nevada, M2, Proximitor and Orbit Logo are registered trademarks of Bently Nevada, a Baker Hughes business, inthe United States and other countries. The Baker Hughes logo is a trademark of Baker Hughes Company. All otherproduct and company names are trademarks of their respective holders. Use of the trademarks does not imply any
affiliation with or endorsement by the respective holders.
Baker Hughes provides this information on an “as is” basis for general information purposes. Baker Hughes does notmake any representation as to the accuracy or completeness of the information and makes no warranties of any
kind, specific, implied or oral, to the fullest extent permissible by law, including those of merchantability and fitness
for a particular purpose or use. Baker Hughes hereby disclaims any and all liability for any direct, indirect,
consequential or special damages, claims for lost profits, or third party claims arising from the use of theinformation, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to makechanges in specifications and features shown herein, or discontinue the product described at any time without
notice or obligation. Contact your Baker Hughes representative for the most current information.
The information contained in this document is the property of Baker Hughes and its affiliates; and is subject tochange without prior notice. It is being supplied as a service to our customers and may not be altered or its content
repackaged without the express written consent of Baker Hughes. This product or associated products may becovered by one or more patents. See Bently.com/legal.

1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 (US) or Bently.com/support
Bently.com

22/22