pred`ictive maintenance systems
PREDICTIVE
MAINTENANCE
SYSTEMS
PROTECTING
Y OUR
INVESTMENT
EDDY CURRENT PROBES FOR INDUSTRY
INDUSTRIAL EDDY
CURRENT PROBE
SYSTEMS
How Eddy Current Probes work
Eddy current probe systems are made up of a coil, embedded in
the tip of the probe, a separate driver unit and an
interconnecting ‘tuned’ length of cable.
The principle af operation, as the name implies, depends upon
the eddy currents set up in the surface of the target material.
The coil is supplied with a constant r.f current from the remote
eddy probe driver, which sets up an electro-magnetic field
between the tip and the observed surface.
Any electrically conductive material within this electro-
ELA TRF Ty ESTE TTM ESTATE TES
induced in it's surface. The energy absorbed from the electro-
magnetic field to produce these eddy currents will vary the
strength of the field, and hence the energising current, in
proportion th the probe target distance. Such changes are
sensed in the driver where they are converted to a varying
voltage signal. The whole probe, extension cable and driver
system relies for it's operation on being a tuned circuit and as
such is dependant on the system's natural frequency. Thus
each system is set up for a fixed electrical/cable length. Eddy
probe systems are usually supplied with 2,5,9 or 14 metre
total cable lengths.
SENTURION eddy current probes have been designed to be the
most robust available and are ideally suited to a vast range of
industrial applications.
y
Designed for Strength, Reliability and Accuracy
*D'
‘R’
+ Target Area ‘T’ à
Linear Measuring = '/a x Probe Tip 0 ‘D’
Range ‘R’
|
Target Area 0 ‘T’ = 2 x Probe Tip 0 ‘D’
-24 Vdc P.S
-18 Vdc P.S
Output (Volts dc)
O 10 20 30 40 50 60 70 80 %0 100 110 120
Eddy Probe Gap (mm)
aenturion probes are calibrated using a standard
target of steel. Other types of conductive material
may affect the sensitivity of the system.
7 SENSONICS
Predictive Maintenance systems
STRAIGHT MOUNT PROBES
@ Robust stainless steel threaded case in various
lengths and threads =
o Peek encapsulated tip impervious to oil or water = : OD = Hf
ingress
=> Suitable for forward or reverse mounting in
suitable bracketry (see Sensonics leaflet L134)
e Supplied with free running locknut
o Intrinsically safe options available
Probe Measurin Ti
& Choice of cable lengths with or without Type Range я Dismoter e
armouring connecting directly to driver unit or
to Extention cable PRS O2 2.5 mm 5 mm LI56
PRS O4 4 mm 8 mm L157
@ Operating temperature range, -30°C to +180°C PRS OF Sn о Lisa
REVERSE MOUNT PROBES
© Robust stainless steel threaded case with integral
locknut
® Suitable for reverse mounting into bracketry or
Sensonics probe housing E - == — e
e Peek encapsulated tip impervious to oil or water
ingress
o Intrinsically safe options available
o Choice of cable lengths with or without
armouring connecting directly to driver unit or
to extension cable Probe Measuring Tip Data Sheet
Type Range Diameter Reference
@ Operating temperature range, -30°C to +180°C E o. Ar a =
DISC PROBES
> Robust stainless steel body with 2 or 3 mounting
holes
x Peek encapsulated tip impervious to oil or water
Ingress
® Range of standard bracketry available, for
mounting (see leafiet L| 34)
© Choice of cable lengths with or without
armouring connecting directly to driver unit or
to extension cable
® Operating temperature range, -30°C to +180°C
—
O
| =r Е
O
o e= JD
Probe Measuring Disc Data Sheet
Type Range Diameter Reference
PRD 02 2.5 mm 5 mm L160
PRD O4 4 mm 8 mm Ll6|
PRD O8 8 mm 20 mm L162
PRD 12 12 mm 25 mm LI63
PRD 18 18 mm 40 mm LI64
he probes shown on this leaflet form the “Senturion” standard range.
If you do not see what you require please call the Sensonics technical sales department.
—
i
i
EXTENSION CABLES
Available in various ‘tuned’ lengths up to 18m. With or
without stainless steel overbraid armouring.
Various connectors, oversheaths and sealing glands are
available. and supplied fitted.
Ordering details appear on relevant probe data sheets
DRIVER UNITS
= Compact design either baseplate or DIN rail
mounted.
2000 ® Robust connector supplied for convenient
2 | fh A TI TL 8 connection/disconnection
= Electrically isolated case
a Four connections per box required
(-24V, OV, Signal and OV)
® Operating temperature, -30°C to +90°C
Ordering details appear on relevant probe data sheets
PROBE HOLDER
Enables the replacement of probes without recalibration.
e Available in aluminium alloy or stainless steel
enclosure
@ Internal adjustment of probe insertion depth
9 Sealed at both cable and probes entry points
® Up to 300mm maximum insertion depth
For details refer to data sheet LI65
DRIVER HOUSING
e ® Sheet steel enclosure with removable gland
plates and lockable door
# Sealed to IP65
t
о 7 ealed to
TT © Capacity for 2, 4, 6 or 9 drivers
TT & Fully wired with terminals fitted
LT Housing No of Size of
| LITE Type Drivers Enclosure
[] Lo] DH2 2 240 x 240 mm
E DH 4 4 240 x 360 mm
DH 6 6 480 x 360 mm
DH 9 9 480 x 480 mm
For details refer to data sheet L166
¢ SENSONIGS
Predictive Maintenance systems
STANDARD FEATURES
OF SENTURION
EDDY CURRENT PROBES
® Rugged Industrial Design
e Conforms to API 670
® Operating temperature, -30”C to |80”C, PROBE
® Operating temperature, -30°C to 90°C, DRIVER
a DIN rail mounted driver units available
® _ Wide power supply tolerance (-18 ro 30Vdc)
@ | Sealed to IP 65, (PROBES)
@ _ Frequency range DC - |0kHz
o Stainless steel case
=. Radiation resistant
= Calibration adjustment + 5%
® Temperature sensitivity < 5% at 120°C (PROBE)
® Temperature sensitivity < 5% at 90°C (DRIVER)
& Output impedance less than 50 ohms
a Effect of target magnetism, less than 5% at | 10ut
@ Suinless steel overbraid on cable
@ Interchangeability, less than 5% error
Ancillary Equipment
Sensonics can offer a full range of bracketry, glands and other
installation aids, as well as an install and commission service.
Please call for details,
NB
Due to Sensonics’ policy of constant improvement. designs may be subject to alteration
without notification.
Shaft axial position
measurement.
thrust wear,
differential expansion
Shaft radial vibration,
eccentricity, relative
vibration, X & Y
monitoring
Speed, zero speed
Phase reference
angle, reverse
rotation
Tapered shaft
axial position,
(4, 2 & single
probe systems)
Shaft axial position
using triangulation
patterns
Alignment
Reciprocating
comp ressor
Rod Drop
monitoring
PREDICTIVE
MAINTENANCE
SYSTEMS
KEEPING
INDUSTRY
TURNING
In a commercial environment of increasingly
OTHER PRODUCTS IN THE SENSONICS RANGE stringent regulations on processes, tighter
® Velocity Transducers budget constraints combined with increased
® Accelerometers quality controls, closer government serutiny oí
® LVDT's & RVDT's operations and ever-more fierce competition
9 Portable predictive maintenance systems from many corners of the globe, there has
9 Signal conditioning systems never been a more appropriate time for
9 On line vibration monitoring industry to adopt systems, procedures and
@ Seismic Sensors policies that ensure the competitive advantage
as well as conformity to the wide array of
SENSONICS CAN ALSO UNDERTAKE ter
® Feasibility studies Sensonics predictive maintenance technology
@ Installation and commissioning (turnkey projects) should be a vital part of your company’s
@ System integration strategy to enable your operations to meet the
@ Condition monitoring surveys and contracts challenges of the next decade - and beyond.
9 Diagnostic services
Local Representation:
re] № со Telephone:
Northbridge Road “4 (0)1442 676833
Berich d Facsimile:
erkhamste +44 (0) 1442 876477
Hertfordshire Email:
HP4 IEF sales(Dsensonics.co.uk
England WWW.Sensonics.net
3 _
i you are at all unsure about any application of Eddy Current Probes please do not hesitate
to call our technical sales department, wha will be delighted to offer advice without
sbiarión
Cert No. FM269720
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