LDT1-028K PIEZO SENSOR w/ Leads Attached SPECIFICATIONS Piezoelectric Polymer Multi-purpose Vibration Sensing Impact Sensing Laminated Dual Wire Lead Attached The LDT1-028K is a multi-purpose, piezoelectric DIMENSIONS sensor for detecting physical phenomena such as vibration or impact. The piezo film element is laminate to a Dimensions in mm inches 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 easy connection to a circuit or monitoring device to process the signal. FEATURES Minimum Impedance: 1 M Preferred Impedance: 10 M and higher Output Voltage: 10 mV-100 V depending on force and circuit impedance Storage Temperature: -40C to +70C -40F to 60F Operating Temperature: 0C to +70C 32F to 160F APPLICATIONS Sensing direct contact force Recording time of an event Counting number of impact events Measuring impact related events Sensing vibration using a cantilevered beam Wakeup switch Motion detection SENSOR SOLUTIONS /// LDT1-028K Piezo Sensor Rev 1 9/2015 Page 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 area to vibrate up and down. Add a small weight to the end of the sensor if greater sensitivity to lower frequencies is desired. 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 (part number 1- 1000288-0) is a fully shielded sensor that is related to 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 should 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. ORDERING INFORMATION Total Film Cap Model Number Part Number Film Electrode Film Electrode Thickness Thickness (nF) ( m ) LDT1-028K/L w/rivets 1-1002910-0 28 m .64 (16) .484 (12) 1.63 (41) 1.19 (30) 157 1.38 52 m .64 (16) .484 (12) 1.63 (41) 1.19 (30) 181 .740 LDT1-052K/L w/rivets 2-1002910-0 28 m LDT2-028K/L w/rivets 1-1003745-0 .64 (16) .484 (12) 2.86 (73) 2.42 (62) 157 2.85 LDT2-052K/L w/rivets 2-1003745-0 52 m .64 (16) .484 (12) 2.86 (73) 2.42 (62) 181 1.55 28 m .86 (22) .740 (19) 6.72 (171) 6.13 (156) 157 11.00 LDT4-028K/L w/rivets 1-1002405-0 52 m LDT4-052K/L w/rivets 2-1002405-0 .86 (22) .740 (19) 6.72 (171) 6.13 (156) 181 5.70 NORTH AMERICA EUROPE ASIA Measurement Specialties, Inc., MEAS France SAS Measurement Specialties (China), Ltd., a TE Connectivity Company a TE Connectivity Company a TE Connectivity Company 1000 Lucas Way 26 Rue des Dames No. 26 Langshan Road Hampton, VA 23666 78340 Les Clayes-Sous-Bois, France Shenzhen High-Tech Park (North) Sales and Customer Service Tel: +33 (0) 130 79 33 00 Nanshan District, Shenzhen 518057 China Tel: +1-800-745-8008 or Fax: +33 (0) 134 81 03 59 Tel: +86 755 3330 5088 +1-757-766-1500 cs.lcsb meas-spec.com Fax: +86 755 3330 5099 Fax: +1-757-766-4297 pfg.cs.asia meas-spec.com Technical Support Email: piezo meas-spec.com TE.com/sensorsolutions Measurement Specialties, Inc., a TE Connectivity company. Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivitys obligations shall only be as set forth in TE Connectivitys Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. 2015 TE Connectivity Ltd. family of companies All Rights Reserved. SENSOR SOLUTIONS /// LDT1-028K Piezo Sensor Rev 1 9/2015 Page 2