R3 ? Sensor0 pages

R3α Sensor

General Purpose, 30 kHz Resonant
Frequency Acoustic Emission Sensor
Description and Features

Operating Specifications

The R3α sensor cavity is machined from a solid stainless
steel rod, making the sensor extremely rugged and reliable.
The ceramic face electrically isolates the sensor from the
structure to assure a low noise operation.

t Dynamict

Most low frequency AE sensors are relatively large. However,
the R3α sensor has the same compact size as our other Alpha
series sensors and boasts a low frequency, 30 kHz resonant
response. This feature makes it extremely useful in tight
areas that require a low frequency sensor for testing.
The Alpha series family of sensors features SMA connectors
versus the Microdot connectors found on PAC’s RXX series of
passive sensors. The Alpha series includes R3α, R6α, R15α,
R30α R50α, R80α and WSα sensors.

Peak Sensitivity V/(m/s); [V/µbar]....... 80 [-63] dB

Operating Frequency Range................ 25 - 70 kHz

Resonant Freq. V/(m/s); [V/µbar]....... 29 [140] kHz

Directionality. .................................... ±1.5 dB
.

t Environmental
t
Temperature Range.........................-65 to 175ºC
t

Shock Limit........................................... 500 g

Completely enclosed crystal for RFI/EMI immunity

t Physical
t

Dimensions. ..... 0.75” dia. x 0.88” h (19 x 22.4 mm)
.

Application

Weight. ...........................................41 grams
.

This sensor is normally selected for structural health monitoring of small to medium concrete and geologic structures
and for concrete and metal pipeline leak detection applications where there needs to be high acoustic background
noise rejection and distances between sensors can be
relatively close (tens of feet).

Case Material. ............................ Stainless Steel
.

Face Material. ....................................Ceramic
.

Connector. ............................................. SMA
.

Connector Locations..................................Side

Seal................................................... Epoxy

Sensor to Preamp Cable

(1 or 2 meters). ....1232-X-SMA
.

Ordering Information and Accessories
R3αt .................................................. R3α or R3a
Magnetic Hold-Down . .................................. MHR15A
.
Preamplifier. .......................................0/2/4, 2/4/6
.
Preamp to System Cable

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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.

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Fax: 609-716-0706

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Phone: 609-716-4000

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

TIFIED Q
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Sensors include
NIST Calibration Certificate & Warranty

195 Clarksville Road, Princeton Junction, NJ 08550
Products & Systems
Division

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C

Frequency response of the R3α. Calibration based on ASTM E1106;
Calibration based on ASTM E976.

(specify length in meters)......1234

ISO 9001

#201-04