Ultrasonic Ceramic Sensors
Ultrasonic Ceramic Sensors
(Ultrasonic Ceramic Transducers)
Type:
U/H/S/Q
Ultrasonic Ceramic Sensor consisting of a disc type/a
bimorph type piezoelectric ceramic vibrator is a sensor
for transmitting and receiving ultrasonic wave in the air.
s
Features
q
q
q
q
q
High output S.P.L.: 112 dB min. (Ex. EFRTUB40K5)
High sensitivity: Ð45 dB min. (Ex. EFRRUB40K5)
Excellent temperature and humidity durability
Small in size
Applicable to multi-function remote control system
because of its wide bandwidth
s
Recommended Applications
Ultrasonic wave transmitter and receiver for;
q
Proximity switch for burglar alarm system, parking
meter and automatic door opener
q
Remote control equipment for such as air conditioner
and garage door opener
s
Explanation of Part Numbers
1
2
3
4
5
6
7
8
9
10
11
E
F
R
Design No.
Nominal
Product Code
EFR
Ultrasonic
Ceramic Sensors
R
T
Applications
For reception use
For transmission use
U
H
Type
Standard Type
Compact Type
Temperature
Stable Type
Enclosed Type
Construction of Element
B
Bimorph Type
Frequency
25K
40K
25 kHz
40 kHz
S
Q
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð EF72 Ð
Ultrasonic Ceramic Sensors
s
Ratings and Characteristics
Type
Part No.
Item
Nominal Frequency
Sensitivity
Sound Pressure Level
Bandwidth
Application
Maximum Input Voltage
Operating Temperature Range
(Vrms)
(ûC)
Type
Part No.
Item
Nominal Frequency
Sensitivity
Sound Pressure Level
Bandwidth
Application
Maximum Input Voltage
Operating Temperature Range
(Vrms)
(ûC)
Type
Part No.
Item
Nominal Frequency
Sensitivity
Sound Pressure Level
Bandwidth
Application
Maximum Input Voltage
Operating Temperature Range
V
0 dB=1 V/Pa
VV
0 dB=2×10
Ð5
Pa
Ask factory for technical specifications before purchase and/or use.
Standard Type
EFRRUB40K5
40.0
Ð45 min.
Ñ
4.0 min.
Receiver
Ñ
EFRTUB40K5
40.0
Ñ
112 min.
4.0 min.
Transmitter
20
EFRRUB25K5
25.0
Ð45 min.
Ñ
2.5 min.
Receiver
Ñ
Ð20 to 60
Compact Type
EFRRHB40K5
40.0
Ð47 min.
Ñ
4.0 min.
Receiver
Ñ
Ð20 to 60
Enclosed Type
EFRRQB40K5
40.0
Ð55 min.
Ñ
1.0 min.
Receiver
EFRTQB40K5
40.0
Ñ
105 min.
1.0 min.
Transmitter
20
Ð20 to 60
EFRTHB40K5
40.0
Ñ
110 min.
4.0 min.
Transmitter
20
Temperature Stable Type
EFRRSB40K5
40.0
Ð50 min.
Ñ
4.0 min.
Receiver
Ñ
Ð40 to 100
EFRTSB40K5
40.0
Ñ
105 min.
4.0 min.
Transmitter
20
EFRTUB25K5
25.0
Ñ
105 min.
2.5 min.
Transmitter
20
(kHz)
(dB)
(dB)
V
VV
(kHz)
(kHz)
(dB)
(dB)
V
VV
(kHz)
(kHz)
(dB)
(dB)
V
VV
(kHz)
(Vrms)
(ûC)
Ñ
Design, Specifications are subject to change without notice.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð EF73 Ð
Ultrasonic Ceramic Sensors
s
Dimensions in mm (not to scale)
Type U
Standard Type
f
Type H
Compact Type
f
Type S
TemperatureStable Type
f
Type Q
Enclosed Type
f
13.0
±
0.5
10.0
±
0.5
13.0
±
0.5
10.0
±
1.5
Screen
Screen
f
16.0
±
0.5
f
12.6
±
0.5
f
16.0
±
0.5
f
18.0
±
0.5
12.0
±
0.5
2-
f
0.8
±
0.2
7.5
±
0.5
Amp.
12.0
±
0.5
12.0
±
0.5
21.0
±
1.0
21.0
±
1.0
2-
f
0.8
±
0.1
2-
f
1.2
±
0.1
15.6
±
1.0
2-
f
1.2
±
0.1
10.0
±
0.5
8.0
±
0.5
10.0
±
0.5
s
Test Circuits Diagram
Test Circuit Diagram for Receiver
feed
back
30cm
Ein
Osc.
Tw.
UCS
Rec.
RL
Amp.
UCS
Silent Box
SCM
Rec.
Test Circuit Diagram for Transmitter
Amp.
30 cm
Osc.
SCM
Silent Box
Freq.
Freq.
Counter
Counter
RL
UCS
SCM
Amp.
Osc.
Rec.
Tw.
:
:
:
:
:
:
:
3.9 kΩ
Ultrasonic Ceramic Sensor
Standard Condenser Microphone
Amplifier
Oscillator
Recorder
Tweeter
Brel
Brel
Brel
Brel
&
&
&
&
Kj¾r
Kj¾r
Kj¾r
Kj¾r
4135
2606
1013
2305
UCS
SCM
Amp.
Osc.
Rec.
Ein
:
:
:
:
:
:
Ultrasonic Ceramic Sensor
Standard Condenser Microphone
Amplifier
Oscilator
Recorder
10 Vrms.
Brel
Brel
Brel
Brel
&
&
&
&
Kj¾r
Kj¾r
Kj¾r
Kj¾r
4135
2606
1013
2305
[Sensitivity]
Output voltage of the specimen shall be measured in
accordance with the specified Test Circuit and the
specified test conditions. The output voltage shall be
expressed in decibeles (dB), where 1 V/Pa is 0 dB.
[Sound Pressure Level]
Maximum sound pressure level from the specimen shall
be measured in accordance with the specified Test Circuit
and the specified test conditions. The output sound
pressure shall be expressed in decibeles (dB), where
2
×
10
Ð5
Pa is 0 dB.
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð EF74 Ð
24.5
±
1.0
9.5
±
0.5
Ultrasonic Ceramic Sensors
s
Typical Characteristics
Frequency Characteristics (Sensitivity)
Type U / H
Frequency Characteristics (Sound Pressure Level)
Type U / H
Ð40
Sensitivity (dB)
Ð45
Ð50
Ð55
TypeS
Output S.P.L. (dB)
115
110
105
100
TypeQ
TypeS
TypeQ
35
40
Frequency (kHz)
45
35
40
Frequency (kHz)
45
EFRRUB25K
Ð35
Output S.P.L.(dB)
Ð40
Ð45
Ð50
Ð55
115
110
105
100
95
EFRTUB25K
Sensitivity (dB)
20
25
Frequency (kHz)
30
20
25
Frequency (kHz)
30
Directivity
Type U/H/S
0 dB= Ð41 dB
ft
Le
Type Q
R
ig
ht
0û
15û
15û
30û
0
30û
ft
e
L
15¡
30¡
0
15¡
R
ig
h
t
30¡
45û
45û
45¡
0
45¡
60û
-10
-20
60û
60¡
75û
75¡
Ð10
Ð20
Ð30
Ð40
60¡
75û
-30
-40
75¡
90û
0 Ð10
Ð30
Ð50
Ð30
Ð10
0
90û
90¡
0
Ð10
Ð30
Attenuation (dB)
Ð50
Ð30
Ð10
0
90¡
Attenuation (dB)
Characteristic Change vs. Load Resistance
Type U/H/S
(40 kHz)
Ω
Sensitivity (dB)
Type Q
100 k
Sensitivity (dB)
Ð30
Ð35
Ð40
Ð45
Ð50
Ð55
10 k
Ω
Ω
1 k
Ð30
100 k
Ð35
10 k
Ð40
Ð45
Ð50
Ð55
Ω
3.9 k
Ω
Ω
Ω
3.9 k
1 k
Ω
35
40
Frequency (kHz)
45
35
40
Frequency (kHz)
45
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð EF75 Ð
Ultrasonic Ceramic Sensors
Application Notes
Because the Ultrasonic Sensors are designed for
use in the air, they can not be used under the
water or others liquid.
1. Design Engineering Notes
1. Application of DC voltage
DC voltage shall not be applied to the
Ultrasonic Sensors because insulation
resistance may deteriorate.
2. Maximum Input Voltage
The Ultrasonic Sensors shall not be operated
beyond the specified ÒMaximum Input VoltageÓ
in the catalog or the specifications.
3. Characteristics change owing to load
impedance
Center frequency and sensitivity change in
accordance with load impedance.
Therefore, the load characteristics chart shall
be taken into consideration in designing
circuit.
4. In the Design of Transmitting Circuits
It shall be noted that the impedance of the
device is as low as 500
Ω
(approximately) at
the resonance frequency.
2. Mounting Notes
1. Installation
It is recommended to hold the Ultrasonic
Sensors by means of rubber
V
sheets or cushions
for absorption of mechanical stresses such as
shock and vibration.
VExcept
sulfurated rubber
2. Soldering
Soldering of the lead terminals shall be done
at a position of 2.5 mm or more apart from
bottom plain of the devices.
3. Bending force to the Terminals
Abnormal bending force shall not be applied
to the terminals of the Sensors, otherwise
holding parts of the terminals may be easily
broken, resulting in failures and damages of
the devices.
4. Directivity
Please be cafeful enough in deciding facing
position of the sensor because of directivity.
3. Storage Notes
1. Environmental Conditions
The Ultrasonic Sensors shall not be operated
and/or stored under following environmental
conditions;
a) To be exposed directly to water or salt
water.
b) Under conditions of dew formation or frost.
c) Under conditions of corrosive atomosphere
such as hydrogen sulfide, sulfurous acid,
chlorine and ammonia.
2. Long Term Storage
The Ultrasonic Sensors shall not be stored
under severe conditions of high temperature
and high humidity. Store them indoors under
40 ¡C max. and 75 %RH max. Use them within
one year and check the solderbility before
use.
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð EF76 Ð
