Piezo-electric accelerometers Piezo-electric accelerometers based on ferro electric ceramics first surfaced in the late 40's as means of collecting data on the dynamic behaviour of airframes and a variety of military and avionic hardware, supplanting the heavier, less robust velocity transducer. Early devices comprised a piezo-ceramic disc sandwiched between a reaction mass and a cylindrical base (the means of attachment to the test object), and this manner of construction features in several manufacturers products today. However the art has moved on ; disadvantages inherent in this compression disc design, namely high strain sensitivity and cross axis error, preclude their use for many applications and have directly led to several innovations whereby the acceleration/charge conversion is accomplished by means of a shear couple applied to a piezo-ceramic plate or tube. Specifically, our KONIC design (UK pat 1507251), comprising a truncated hollow piezo-ceramic cone, spigot, and concentric reaction mass, provides virtual isolation of the sensing element from mounting induced strain, with the further benefit of minimal cross axis error deriving from its radial symmetry. In addition, the KONIC sensing element is mechanically preloaded, temperature constraint imposed by use of adhesives is eliminated. The various configerations outlined above are clarified in fig 1. KONIC accelerometers are produced in sizes from 1.5gm, weight, 2pC/g sensitivity upwards, maximum 90gm., 300pC/g. Piezo-ceramic shear plate technology is employed at the periphery of the KONIC range as offering miniaturisation advantages, and sensitivity enhancement by virtue of parallel plate construction.		Type Sensitivity Weight grammes Resonant Frequency (KHz) Temperature Range Min/Max oc Connector M: Microdot T: TNC Mounting A: M5 B: 10/32UNF C: ¼UN D: \M4 MONO-AXIAL, CHARGE OUTPUT A/28/E 0.3/0.6 pC/g 0.25 45 -50/+200 L8 side entry adhesive A/25/E 1.3/2.7 pC/g 1.5 60 -50/+200 L5 side entry adhesive A/23/E 6/10 pC/g 4.5 50 -50/+250 M side entry adhesive A/23/TE 6/10 pC/g 4.5 50 -50/+250 M top entry adhesive A/23/S 6/10 pC/g 5.2 50 -50/+250 M side entry integral stud A A/23/TS 6/10 pC/g 5.2 50 -50/+250 M top entry integral stud A A/23/SIT 6/10 pC/g 8.3 30 -50/+250 isolated M top entry integral stud A A/23/IT 6/10 pC/g 8 50 -50/+250 isolated M top entry adhesive A/23-3 6/10 pC/g     -50/+250   tapped base A/23/SI 6/10 pC/g 10 30 -50/+250 isolated M side entry integral stud B A/26/E 8/12 pC/g 6,7 50 -50/+250 M side entry adhesive A/26/S 8/12 pC/g 7 50 -50/+250 M side entry integral stud A A/24/E       -50/+250     A/124/E       -50/+125     A/22 20/32 pC/g 12 20 -50/+250 M side entry through hole A/20 28/42 pC/g 17 28 -50/+250 M side entry tapped base B A/20/T 28/42 pC/g 17 28 -50/+250 M top entry tapped base B A/20/TC 28/42 pC/g 27 23 -50/+250 T top entry tapped base B A/29 100 pC/g 46 15 -50/+250 M side entry tapped base B A/29/T 100 pC/g 46 15 -50/+250 M top entry tapped base B A/29/TC 100 pC/g 50 15 -50/+250 T top entry tapped base B A/21 300/420 pC/g 95 10 -50/+250 M side entry tapped base B A/21/T 300/420 pC/g 95 10 -50/+250 M top entry tapped base B A/21/TC 300/420 pC/g 102 10 -50/+250 T top entry tapped base B A/600 900/1300 pC/g 110 8 -50/+250 M side entry tapped base B A/600/T 900/1300 pC/g 110 8 -50/+250 M top entry tapped base B A/600/TC 900/1300 pC/g 110 8 -50/+250   tapped base B A/800 7000/11000 pC/g 400 4 -50/+150 M side entry tapped base C A/800/T 7000/11000 pC/g 400 4 -50/+150 M top entry tapped base C A/800/TC 7000/11000 pC/g 407 4 -50/+150 T top entry tapped base C MONO-AXIAL, INTEGRAL ELECTRONICS A/123/E 6/10 mV/g 5 50 -50/+125 M side entry adhesive isolated A/123/S 6/10 mV/g 5.5 50 -50/+125 M side entry integral stud A A/123/TS 6/10 mV/g 5.5 50 -50/+125 M top entry integral stud A A/123/TE 6/10 mV/g 5.2 50 -50/+125 M top entry adhesive A/122/V 10/31.6/100 mV/g 16 20 -50/+125 M side entry through holes A/120/V 10/31.6/100 mV/g 18 28 -50/+125 M side entry tapped base B A/120/VT 10/31.6/100 mV/g 18 28 -50/+125 M top entry tapped base B A/120/VTC 10/31.6/100 mV/g 32 23 -50/+125 T top entry tapped base B A/120/VI 10/31.6/100 mV/g 18 28 -50/+125 isolated M side entry tapped base B A/120/VTI 10/31.6/100 mV/g 18 28 -50/+125 isolated M top entry tapped base B A/121/V 100/316/1000 mV/g 90 9 -50/+125 M side entry tapped base B A/121/VI 100/316/1000 mV/g 90 9 -50/+125 isolated M side entry tapped base B TRI-AXIAL, CHARGE OUTPUT A/38 0.3/0.6 pC/g 0.9/1 32/36 -50/+200 L8 through holes/adhesive (isolated) A/38-1 0.3/0.6 pC/g 0.9/1 32/36 -50/+200 L8 through holes/adhesive (isolated) A/32 1.3/2.7 pC/g 8 30/35 -50/+200 L5 through holes/adhesive (isolated) A/31 5/9 pC/g 18 25/28 -50/+220 M through holes/adhesive (isolated) A/34 5/9 pC/g 19 25/28 -50/+220 M through holes/adhesive (isolated) A/33 5/9 pC/g 38 15 -50/+220 (+800) M through holes/adhesive (isolated) A/30 20/30 pC/g 38 13/15 -50/+220 M through holes/adhesive (isolated) A/30-1 20/30 pC/g 38 13/15 -50/+220 M through holes/adhesive (isolated) TRI-AXIAL, INTEGRAL ELECTRONICS A/131/V 10 mV/g - 100 mV/g 19 25/28 -50/+125 M through holes/adhesive (isolated) A/134/V 10 mV/g - 100 mV/g 19 25/28 -50/+125 M through holes/adhesive (isolated) A/130/V 100 mV/g 40 13/15 -50/+125 M through holes/adhesive (isolated) MONO-AXIAL, INDUSTRIAL A/53/F 10/15 pC/g 20 15 -50/+300 integral hardline cable through holes A/53/F/HT 1.7/2.6 pC/g 20 15 -50/+400 integral hardline cable through holes A/52/F 90/110 pC/g 100 12 -50/+300 integral hardline cable through holes A/52/F/HT 10/13 pC/g 100 12 -50/+400 integral hardline cable through holes A/81/F 210/260 pC/g 150 10 -50/+300 integral hardline cable through holes A/81/F/HT 25/45 pC/g 150 10 -50/+400 integral hardline cable through holes A/107/F 80/110 pC/g 80 18 -50/+300 2 pole, 7/16 UNF thd. through holes A/107/F/HT 10 pC/g 80 (55) 18 -50/+400 2 pole, 7/16 UNF thd. through holes A/301/F 190/250 pC/g 150 8 -50/+300 2 pole, 7/16 UNF thd. through holes A/301/F/HT 23/31 pC/g 150 8 -50/+400 2 pole, 7/16 UNF thd. through holes A/172/VF 100 mV/g 130 11 -50/+125 2 pole, 7/16 UNF thd. through holes