350300 Dynamic Pressure Sensor
Datasheet
Bently Nevada Machinery Condition Monitoring

110M4613 Rev. DDescription
The Hydro Dynamic Pressure Sensor System consists of the 350300
Hydro Dynamic Pressure Transducer which uses piezoresistive
sensing technology and the 146824 interconnect cable. It is intended formeasuring both static and dynamic pressure in fluid machines such ashydro turbines or centrifugal pumps.
This sensor is an integral part of a Hydro Turbine or Centrifugal Pump
Condition Monitoring and Asset Management System. When utilizedwith our 3500/46M Hydro Monitor and System 1 Plant AssetManagement software, it enables trends and specialized dynamic plots
for diagnostics. The Dynamic Pressure Transducer has a robust designfor high reliability in plant environments and is designed for 50 million
cycles.
For Hydro Turbine applications this measurement can detect andmanage hydraulic phenomena such as Rough Load Zone, vortexing,and cavitation in the draft tube and head cover area, as well as
pulsations in the penstock. For centrifugal pump applications, it canhelp detect and manage cavitation and other flow instabilities that arepotentially detrimental to machinery and operations.

350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. D

Reverse polarity
protection

Specifications

Compensated-40°C to 125°C (-40°F to 257°F)
Temperature Range

350300 Dynamic Pressure Sensor
Operation outside the specified limits will result infalse or inaccurate readings.

Transducer Characteristics
Measurement
Range (static)

0 to 15/ 30/ 45/ 50/ 60/ 75/ 100/
200/ 300/ 500/ 1000/ 1500/
2000/ 3000/ 5000 psia
0 to 0.103/ 0.207/ 0.310/ 0.345/
0.414/ 0.517/ 0.68/ 1.37/ 2.07/
3.44/ 6.89/ 10.3/ 13.8/ 20.7/
34.5 MPaaProof (Over)
Pressure>3X Full Scale

Burst Pressure>4X Full Scale

Scale Factor

667 mV/psia (15 psia range)
333 mV/psia (30 psia range)
222 mV/psia (45 psia range)
200 mV/psia (50 psia range)
167 mV/psia (60 psia range
133 mV/psia (75 psia range)
100 mV/psia (100 psia range)
50 mV/psia (200 psia range)
33 mV/psia (300 psia range)
20 mV/psia (500 psia range)
10 mV/psia (1000 psia range)
7 mV/psia (1500 psia range)
5 mV/psia (2000 psia range)
3 mV/psia (3000 psia range)
2 mV/psia (5000 psia range)

Full Scale Output

10 ± 0.1 Vdc

Offset0.0 ± 0.1 Vdc

DC Output
Impedance< 200 Ω

Minimum Load
Resistance

2,500 Ω

Max. Current< 16 mA

Insulation
Resistance

100 MΩ @ 500V

Yes

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OperatingTemperature-55°C to 125°C (-67°F to 257°F)

Temperature Error(Reference 20°C)-10°C to 50°C (14°F to 122°F) ±1.0 %FS-40°C to 125°C (-40°F to 257°F)± 1.5 %FS

Non-Linearity,
Hysteresis &Repeatability(BFSL)≤ ±0.1 %FS

Frequency
response

2000 HzVibration
Sensitivity, Max<0.00667 %FS/g (15 psiarange)<0.00333 %FS/g (30 psiarange)<0.00222 %FS/g (45 psiarange)<0.00200 %FS/g (50 psiarange)<0.00167 %FS/g (60 psiarange)<0.00133 %FS/g (75 psiarange)<0.00100 %FS/g (100 psiarange)<0.00050 %FS/g (200 psiarange)<0.00033 %FS/g (300 psiarange)<0.00020 %FS/g (500 psiarange)<0.00013 %FS/g (750 psiarange)<0.0007 %FS/g (1500 psiarange)<0.0005 %FS/g (2000 psiarange)<0.0003 %FS/g (3000 psiarange)<0.0002 %FS/g (5000 psiarange)

350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. D

Physical & Environmental
Weight< 8 ozDimensions

See Figure 1 in Graphs andFigures section

Materials

316L Stainless Steel Body

PressureConnection¼-18 NPT maleElectrical
Connector

MIL-C-26482 (4 pin)

Mounting Torque15.0 N-m (11.1 lbf-ft)

Storage
Temperature-40°C to 140°C (-40°F to 284°F)

Check the chemical compatibility of the sensor’s
wetted parts (316L stainless steel) with the medium
to be measured.

Power Supply
PowerSupply
Voltage

13 - 42 Vdc

SupplyVoltageEffects<0.005 %FS/V

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350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. D

Compliance and Certifications
FCC
This device complies with part 15 of the FCCRules. Operation is subject to the following twoconditions:llThis device may not cause harmfulinterference.
This device must accept any interference
received, including interference that may
cause undesired operation.

EMC
EN 61326-1: 2013
CISPR 11: 2009 + A1: 2010
55011: 2009 + A1: 2010
EMC Directive 2014/30/EC

PED
PED Directive 2014/68/EU

RoHS
RoHS Directive 2011/65/EU

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350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. DAAAA
OrderingOption

Ordering Information
For the detailed listing of country and productspecific approvals, refer to the Approvals Quick
Reference Guide , Document 108M1756, at

Dynamic Pressure
Range (3500/46M)1

Static Pressure
Range2

Psi pkPsia

KPa pkKPaa

1 Dynamic pressure ranges are expressed in peak

amplitude units, half of the full peak-to-peak pulsation
amplitude.

Bently.com.

2 Static pressure ranges are in absolute pressure (Psia,350300 Dynamic Pressure Sensor

KPaa), so static pressure requirements stated as gaugepressures (Psig, KPag) may necessitate a numericallyhigher absolute pressure full-scale range.

350300-AAAA-BB (All transducers have a 1/4 18 NPT male thread)

B: Approvals Option
A: Pressure Range Options
00

Select an option from the chart below(0015 to 5000) that meets both static anddynamic pressure range requirements.
Note that the static pressure range must
accommodate the dynamic pressure(pulsation) amplitude that will ride on topof (overshoot) the static pressure.

No Approvals

146824 Interconnect Cable
146824-AAAA
A: Length Option
0010

10 ft (3 m)

Dynamic Pressure
Range (3500/46M)1

Static Pressure
Range20025

25 ft (7.6 m)

Psi pk

KPa pk

Psia

KPaa

0050

50 ft (15.2 m)

0015

6

41

15

103

0100

100 ft (30.5 m)

0030

12

82.5

30

206

0200

200 ft (61.0 m)

0045

18

124

45

310

0300

300 ft (91.4 m)

0050

20

138

50

344

0400

400 ft (121.9 m)

0060

24

165

60

413

0500

500 ft (152.4 m)

0075

30

206

75

517

1000

1,000 ft (304.8 m)

0100

40

280

100

690

0200

80

560

200

1380

Associated 3500 Monitors Spares

0300

125

861

300

2068

3500/46M

0500

200

1380

500

3450

10004002757

1000

6894

1500

575

3964

1500

10342

2000

800

5515

2000

13789

3000

1350

9307

3000

20684

5000

2000

13789

5000

34500

AAAA
Ordering
OptionHydro Monitor with Multimode
Positive Input I/O ModuleSpares

5/8

176449-06

3500/46M Hydro Monitor

169715-01

Multimode Positive Input I/O Modulewith Internal
Terminations

350300 Dynamic Pressure Sensor
Datasheet

169715-02

110M4613 Rev. D

Multimode Positive Input I/O Modulewith External Terminations

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350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. D

Graphs and Figures

Figure 1: 350300 Dynamic Pressure Sensor Dimensions and Pinout

Figure 2: 146824-AAAA Cylinder Pressure Cable

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350300 Dynamic Pressure Sensor
Datasheet

110M4613 Rev. D

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1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 or 1.800.227.5514 (US only)
Bently.com

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