LDT1-028K Piezo Sensor
w/ Lead Attachment
Piezoelectric Polymer
Multi-purpose
Vibration Sensing
Impact Sensing
Laminated
Dual Wire Lead Attached
The LDT1-028K
is a multi-
purpose, piezoelectric sensor for
detecting physical phenomena
such as vibration or impact. The
piezo film element is laminate to a
sheet of polyester (Mylar), and
produces a useable electrical
signal output when forces are
applied to the sensing area. The
dual wire lead attached to the
sensor allows a circuit or
monitoring device to process the
signal.
dimensions
Dimensions in mm [inches]
FEATURES
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Minimum Impedance:
1 MΩ
Preferred Impedance:
10 MΩ and
higher
Output Voltage:
10 mV-100V
depending on Force and Circuit
Impedance
Storage Temperature: -40°C to +70°C
[-40°F to 160°F]
Operating Temperature: 0°C to
+70°C[32°F to 160°F]
APPLICATIONS
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Sensing Direct Contact Force
Recording Time of an Event
Counting Number of Impact Events
Measuring Impact Related Events
Sensing Vibration using Cantilevered
Beam
Wakeup Switch
Motion Detection
www.meas-spec.com
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05/12/2009
LDT1-028K Piezo Sensor Rev 1
LDT1-028K Piezo Sensor
w/ Lead Attachment
instructions
Direct Impact Sensing:
Using an adhesive (such as double sided tape) adhere the sensor area to
a pliable pad to absorb impact with the full length protective laminate on the impact face. Apply the
force (such a finger touch or hammer blow) to the sensor area.
Vibration and Motion Sensing:
Mount the element in a cantilever arrangement, allowing the
sensing are to vibrate up and down. Add a small weight to the end of the sensor if the greater
sensitivity is required.
The direct adherence of the LDT1-028K to the vibrating body can detect vibration, but another piezo
film sensor configuration (SDT1-028K) is available and designed for this application. The SDT1-028K
is a fully shielded form of the LDT1-028K.
Bending:
A cantilever arrangement will allow the piezo element to be deflected and this can be used
to detect a striking object when the element is flexed. It is essential that the film not be in the neutral
axis of the beam. Otherwise signal cancellation can result, minimizing signal.
The LDT1-028K device is unshielded by design. If
shielding
is required, the sensor can be enclosed in
a proper environment. Metallized tapes can be used to cover the sensor but these may impede motion
and subsequent output. Wire leads can be twisted or covered. Other piezo film devices such as SDT1-
028K are available and are shielded.
The LDT1-028K is designed to cover a wide range of sensing applications. Specific sensors requiring
wider dynamic range, more or less sensitivity, different area coverage, different shapes, extended life,
resistance to sharp objects, and higher temperature range, etc., can be constructed to fit the
applications as special orders.
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Furthermore, this information does not
convey to the purchaser of such devices any license under the patent rights to the manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice
to any product herein. Measurement Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation
consequential or incidental damages. Typical parameters can and do vary in different applications. All operating parameters must be validated for each customer application by
customer’s technical experts. Measurement Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
ordering information
Description
LDT1-028K w/leads
SDT-028K w/leads
North America
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
Sales and Customer Service
Tel: +1-800-745-8008 or
+1-757-766-1500
Fax: +1-757-766-4297
Technical Support
Email: piezo@meas-spec.com
LDT1-028K Piezo Sensor Rev 1
Part Number
1-1002910-0
1-1000288-0
Europe
MEAS Deutschland GmbH
Hauert 13
44227 Dortmund
Germany
Sales and Customer Service
Tel: +49 (0)231 9740 21
Technical Support
Tel: +49 (0)6074 862822
Email: piezoeurope@meas-spec.com
www.meas-spec.com
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Asia
Measurement Specialties (China), Ltd.
No. 26 Langshan Road
Shenzhen High-Tech Park (North)
Nanshan District
Shenzhen, China 518107Sales and
Customer Service
Tel: +86 755 3330 5088
Technical Support
Email: piezo@meas-spec.com
05/12/2009
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