CH15I0 pages

CH15I Sensor

Medium Frequency & Low Noise
Integral Preamp Acoustic Emission Sensor

Description and Features

Operating Specifications

The CH15I sensor is a medium frequency, resonant, acoustic

t Dynamict

emission sensor with an integral, low noise, filtered, 40 dB
preamplifier that can drive up to 1000 feet of cable. The
sensor comes standard with PAC’s unique “Auto Sensor Test”

Peak Sensitivity, Ref V/(m/s); Ref [V/µbar].............109 [-22] dB
Operating Frequency Range. ............................ 100 – 200 kHz
.
Resonant Frequency Ref V/(m/s); Ref [V/µbar]....... 75 [150] kHz
Directionality. .................................................... ±1.5 dB
.

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(AST*) function.
The CH15I features a strong, insulated, lightweight, aluminum alloy, integrated body structure that is color-coded blue
to identify the sensor model. This sensor’s outside shell is
anodized, providing a nonconductive finish to prevent any
possible electric shorts from metal testing structures. It
is the same size and has the same frequency response and
sensitivity as the R15I sensor, but the EMI shielding ability of
the CH15I has been improved by more than 300% compared
with previous versions.

Applications
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Metalst

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Cranes

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Compressed gas cylinderst

Gain.
...................................................................40 dB
Power Requirements..............................16 - 30 Vdc @ 25 mA
Dynamic Range..................................................... >80 dB
Output Voltage....................................... 20 V peak to peak
Noise Level (RMS rti)............................................. <2.4 µV
Output Drive Impedance. ...........................................50 Ω
.
Sensor Drive Capability......................... up to 1000 ft (300 m)
AST Pulse. .......................... 24 V, 3 microseconds into crystal
.
Grounding................Case grounded, isolated from sensing face

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Temperature Range. ......................................... -35 to 75ºC
.
Shock Limit........................................................... 500 g
Completely enclosed crystal for RFI/EMI immunity

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Pressure vessels

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Bucket truckst

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Structures

Dimensions. ......................1.13” dia x 1.28” h (29 x 32.6 mm)
.
Weight............................................................ 51 grams
Case Material................... Blue color, anodized aluminum alloy
Face Material..................................................... Ceramic
Connector.............................................................. BNC
Connector Locations................................................. Side
Seal................................................................... Epoxy
Matching Cable. ................................................... 1234-X
.

Ordering Information and Accessories
Cable (specify cable length).............................................1234 - X
Magnetic Hold-Down . .................................................... MHR15I
.
Amplifier....................................................................... AE2A
Sensors include
NIST Calibration Certificate, Auto Sensor Test Function & Warranty

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Due to continuing improvement, MISTRAS Group, Inc. reserves the right to amend specifications without notice.
Copyright © 2010 MISTRAS Group Inc. All Rights Reserved.

MANA

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Fax: 609-716-0706

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T S YS T E

Phone: 609-716-4000

Email: sales.systems@mistrasgroup.com www.mistrasgroup.com

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Products & Systems
Division

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195 Clarksville Road, Princeton Junction, NJ 08550

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Frequency response of the CH15I. Calibration based on ASTM
E1106; Calibration based on ASTM E976.

* AST — Auto Sensor Testing feature allows AE systems to control the sensor as a pulser
and a receiver at the same time. It can therefore characterize its own condition as well
as send out a simulated acoustic emission wave that other sensors can detect, so the
condition of the nearby sensors also can be tested.

ISO 9001

R#117403