Bently Nevada 330525 Specifications

330525 Velomitor XA Piezo-velocity
Sensor

Datasheet

Bently Nevada Machinery Condition Monitoring

Description

The Velomitor XA (eXtended Application) Sensor is a
ruggedized version of Bently Nevada's 330500 Velomitor
Sensor. Its 316L stainless steel case and unique, weatherproof
connector and cable assembly permit mounting without a
housing. The Velomitor XA Sensor cable assembly is suitable
for use in moist environments, and the Velomitor XA Sensor
design meets the requirements of IP-65 and NEMA 4X dust
ratings when properly installed with a mating extension
cable.

If you are measuring a machine housing to determine
where to install transducers, consider what kinds of
data you need to obtain. Most common machine
malfunctions (imbalance, misalignment, and so forth)
originate at the rotor and cause a change in rotor
vibration. The location you select on the housing must
accurately conduct rotor vibration to the transducer.

Install the transducer carefully. If you don't, the
transducer may not accurately detect vibrations and
can transmit invalid data. Bently Nevada provides
engineering services to accurately measure machine
housings and to install transducers.

141633 Rev. M

330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Specifications

Parameters are specified from +20 to +30 °C
(+68 to +86 °F) and 100 Hz unless otherwise
indicated.

Operating the unit outside the
specified limits may result in false
readings or loss of machine
monitoring.

Sensitivity 3.94mV/mm/s (100 mV/in/s)

±5%.

Frequency
Response

Temperature
Sensitivity

Velocity
Range

Transverse
Sensitivity

Amplitude
Linearity

Mounted
Resonant
Frequency

Broadband
Noise Floor
(4.5 Hz to 2
kHz)

4.5 to 2,000 Hz (270 to 120,000
cpm) ±3.0 dB,

6.0 to 1,000 Hz (360 to 60,000
cpm) ±0.9 dB.

-14% to +7.5% typical over the
operating temperature range.

1270 mm/s (50 in/s) peak.

Less than 5% of sensitivity.

±2% to 152 mm/s (6 in/s) peak.

Greater than 12 kHz.

0.004 mm/s (160 min/s) rms,
nominal.

Broadband
Noise Floor

Grounding Case isolated

Maximum
cable length

Less than 0.004 mm/s (160
µin/s)

305 metres (1,000 feet) of
cable, BN part number
02173007 with no degradation
of signal.

Environmental Limits

Operating
Temperature
Range

Shock
Survivability

Relative
Humidity

Magnetic
Field
Susceptibility

Operating
Temperature
Range

Shock
Survivability

Relative
Humidity

Magnetic
Field
Susceptibility

-55 °C to +121 °C (-67°F to
+250°F)

5000 g peak, maximum

To 100% non-submerged; case
is hermetically-sealed.

<51 min/s/gauss (50 gauss, 50­60 Hz)

-55 °C to +121 °C (-67°F to
+250°F)

5000 g peak, maximum

To 100% non-submerged; case
is hermetically-sealed.

<51 min/s/gauss (50 gauss, 50­60 Hz)

Physical Description

Power
Requirements

Output Bias
Voltage

Dynamic
Output
Impedance

DC Voltage: -22 to -30 V

Bias Current: 2.5 to 6.0 mA

-12 ± 3.0 VDC, Over
Temperature Referenced to
Pin A

Less than 2400 Ω

DC

Weight 156 g (5.5 oz), typical

Diameter 28 mm (1.1 in)

Height 73.1 mm (2.88 in)

Case
Material

Connector 2-pin Mil-C-26482 hermetically-

2/10

316L stainless steel

sealed, 316L stainless steel shell.

330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Mounting

45 N-m (33 ft-lb) maximum

Torque

Polarity Pin A goes positive with respect

to pin B when the sensor case
motion is toward the connector.

Cable Bend

1.5-in minimum bend radius.

Radius

Operating the unit outside the
specified limits may result in false
readings or loss of machine
monitoring.

Before installing and using this product, read
the 330500, 330525, and 330530 Velomitor
Sensors User Guide (document 100076).

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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Class I, Div 1, Groups A, B, C, D;

Compliance and

Class II, Groups E, F, G
Class III

Certifications

Install per drawing 167536

FCC

This device complies with part 15 of the
FCC Rules. Operation is subject to the
following two conditions:

l This device may not cause harmful

interference.

l This device must accept any

interference received, including
interference that may cause
undesired operation.

EMC

Intrinsically
Safe and
Non­Incendive

T4 @ -40 °C ≤ Ta ≤ +100 °C
(-40 °F ≤ Ta ≤ +212 °F)

Ex nL IIC T4
Class I, Division 2, Groups A, B, C
and D

AEx nA T4
Class I, Division 2, Groups A, B, C
and D

Install per drawing 167536

T4 @ -40 °C ≤ Ta ≤ +100 °C
(-40 °F ≤ Ta ≤ +212 °F)

EMC Directive 2014/30/EU

RoHS

RoHS Directive 2011/65/EU

Maritime

330400and 330425 only

ABS 2009 Steel Vessels Rules

1-1-4/7.7,4-8-3/1.11.1,4-9-7/13

Hazardous Area Approvals

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

CSA/NRTL/C

190501 (Agency Approval Options 01
through 04)

Intrinsically
Safe

Ex ia IIC T4:
Class I, Div 1, Groups A, B, C, D.
Class II, Group E, F and G
Class III

AEx ia IIC T4:

330400,
330425

330500 Ex ia IIC T4

330525 Ex ia IIC T4

Ex ia IIC T4
AEx ia IIC T4
Class I, Div 1 Groups A, B, C and D
Class II, Groups E, F, and G
Class III

T4 @ -40°C ≤ Ta ≤ 100°C
Install per dwg 167538

AEx ia IIC T4
Class I, Division 1, Groups A, B, C
and D Class II, Groups E, F, G
Class III

Install per dwg 167537
T4 @ -40°C ≤ Ta ≤ 100°C

Ex nL IIC T4
AEx nA IIC T4
Class I, Div 2, Groups A, B, C, D

Install per dwg 167537
T4 @ -40°C ≤ Ta ≤ 100°C

AEx ia IIC T4
Class I, Division 1, Groups A, B, C
and D Class II, Groups E, F, G
Class III


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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

T4 @ -40°C ≤ Ta ≤ 100°C

Ex nL IIC T4
AEx nA IIC T4
Class I, Div 2, Groups A, B, C, D

Install per dwg 167539
T4 @ -40°C ≤ Ta ≤ 100°C

ATEX/IECEx

190501, 330400, 330425, 330500, 330525

190501











Entity
Parameters



II 1 G

Ex ia IIC T4 Ga


II 3 D

Ex na IIC T4 Gc
Ex tc III T130°C Dc

T4@ Ta = -55°C to 121°C


Zone 0/1 Zone 2

Ui= 30V Ui= 30V

Ii= 200mA Ii= 200mA

Pi= 0.84W Pi= 1.26W

Ci-10.8nF 

Li= 0 

330400, 330425,
330500, 330525









Entity
Parameters

Pi= 0.75W Pi= 1.14W

Ci-27.2nF 

Li= 0 

II 1 G

Ex ia IIC T4 Ga


II 3 D

Ex na IIC T4 Gc
Ex tc III T130°C Dc

T4@ Ta = -55°C to 121°C


Zone 0/1 Zone 2

Ui= 28V Ui= 28V

Ii= 150mA Ii= 150mA

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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Hazardous Area Conditions of Safe Use

ATEX/IECEx

Zone 0/1:

Equipment must be connected to equipment,
which meets the abovelisted entity parameters.

The cables type A or B (in compliance with EN
60079-25) must respect the cable parameters
listed with the entity parameters.

Zone 2 :

The supply electrical parameters shall not
exceed the values mentioned in the tables
above.

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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Accessories

Ordering Information

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

330525-AA

A: Agency Approval Option

0 0 None Required

0 1 CSA/NRTL/C

0 2 SIRA/CENELEC

106765-AA Interconnect Cable

A: Length (in meters)

Minimum
length

Maximum
length

Order in increments of 3 meters.

1 meter(3.3 feet)

25 meters (82 feet)

100076 330500/330525 Velomitor

Sensor and Velomitor XA
SensorUser Guide

02173007 Bulk cable; two-conductor

twisted, shielded. 22 AWG cable
without connectors or terminal
lugs. Specify length in feet.

103537-01 Terminal Mounting Block.

Provides simple field wiring
connection and can be
mounted inside any standard
Proximitor Sensor housing. One
terminal mounting block is
needed for each Velomitor XA
Sensor connection.

03839144 Splash-resistant boot cover for

interconnect cable assembly.
The boot is made from
fluorosilicone elastomer. Boot
color is blue.

03839142 Bottom clamp used to secure

the boot to the Velomitor XA
Sensor case.

03839143 Top clamp used to secure the

boot to the interconnect cable
assembly.

Terminal Housing

Terminal Housing for terminating Velomitor XA
Sensor cable to bulk cable listed above. The
Terminal Housing provides local connection of
the Velomitor XA Sensor signal wires to the
monitor field wiring. Each Terminal Housing
can accommodate up to 2 Velomitor XA
Sensor Cables.

106769-AA

A: Conduit Fitting Option

0 0 No fittings supplied

0 1 One ¾ NPT fitting

0 2 Two ¾ NPT fittings





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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Graphs and Figures

1. Splash-resistant boot with clamps 5. “A” (white)

2. Stainless steel armor over cable 6. “B” (black)

3. 0.382 mm2 (22 AWG) 7. “SHLD” (green)

4. Clear shrink tubing 8. Overall length ± 200 (7.8)

Figure 1: Dimensions for 106765 Cable

Dimensions are in millimeters (inches)

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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

1. MIL-C-26482 receptacle

2. 25.4 (100) hexagonal

3. 1/4-18 NPT

Figure 2: Dimensions for 330525 Velomitor XA Piezo-Sensor

Dimensions are in millimeters (inches)

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330525 Velomitor XA Piezo-velocity Sensor
Datasheet 141633 Rev. M

Copyright 2020 Baker Hughes Company. All rights reserved.

Bently Nevada, Orbit Logo, Velomitor, Proximitor and System 1 are registered trademarks of Bently Nevada, a Baker
Hughes Business, in the United States and other countries. The Baker Hughes logo is a trademark of Baker Hughes
Company. All other product 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.

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make any representation as to the accuracy or completeness of the information and makes no warranties of any
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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 the
information, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to make
changes 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 to
change 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 be
covered by one or more patents. See Bently.com/legal.



1631 Bently Parkway South, Minden, Nevada USA 89423

Phone: [phone] or 1.800.227.5514 (US only)

Bently.com

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