Jiakang Liquid Level Control Devices
Jiakang Liquid Level Control Devices

Jiakang Liquid Level Control Devices

Jiakang Liquid Level Control DevicesThe transducer generates an ultrasonic pulse, which is reflected by the liquid surface and detected by the same sensor. The distance between the sensor and the liquid surface is determined using the duration between the acoustic wave’s emission and reception. Because of the use of non-contact measurement, the ultrasonic level meter may be widely used to measure the height of both liquid and solid materials, regardless of the kind of media.

Main Parameters

Part Number UA3S30
Size φ40～φ4100mm
Beamwidth 12 ± 1°
Capacitance 2000 ～8000F
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Main Materials

Electrical Data Symbol Main Materials
P-659 P-660 P-663 P-664 P-666 P-667 P-668 P-669 P-672 P-673 P-676 P-678 P-679 P-690
Piezo-electric coupling coefficient kp 0.58 0.70 0.67 0.67 0.78 0.10 0.68 0.62 0.70 0.68 0.7 0.72 0.65 0.74
k31 0.32 0.39 0.38 0.37 0.42 0.39 0.35 0.41 0.39 0.45 0.42 0.38 0.40
k33 0.60 0.73 0.70 0.70 0.78 0.70 0.68 0.72 0.70 0.80 0.72 0.70 0.75
kt 0.42 0.46 0.45 0.45 0.50 0.45 0.46 0.44 0.46 0.46 0.50 0.47 0.46 0.48
Relative dielectric constant εT33 / ε0 1100 3200 2200 2800 4500 180 2300 1400 3400 2200 6000 2750 1600 3800
Piezo-electric charge constant

d33×10-12C/N

 280 700 400 480 780 70 430 250 600 430 850 540 320 710

d31×10-12C/N

 -120 -350 -200 -350 -230 -130 -280 -230 -420 -260 -150 -360
Mechanical quality factor Qm 100 60 80 500 60 2500 90 1000 80 90 60 80 1000 70
Frequency constant

fr·d     kHz·cm

 230 190 200 220 180 200 230 190 200 180 190 230 190

fr·t     kHz·cm

 210 200 200 225 200 225 200 200
Temp charac-teristics

| TKfr | (-20℃~80℃)
×10-6 / ℃

 100 260 300 120 400 30 150 100 300 100 400 200 100 260

| TKCT | (-20℃~80℃)
×10-6 / ℃

 1500 4500 5000 2500 6000 1800 1500 4000 2000 6000 3000 1500 4000
Curie Temp.

Tc

 

 320 220 220 230 180 450 355 340 230 325 140 280 330 210
Dielectric loss

tgδ（%）

 1.20 1.80 2.00 0.50 2.60 0.70 2.00 0.30 2.30 2.00 2.60 1.50 0.40 1.80
Dielectric loss tgδ（400V/mm，%） 1.00 1.00