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. ■ Features ● ● ● ● ● ■ Recommended Applications 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 Ultrasonic wave transmitter and receiver for; ● Proximity switch for burglar alarm system, parking meter and automatic door opener ● Remote control equipment for such as air conditioner and garage door opener ■ Explanation of Part Numbers 1 2 3 4 5 6 7 8 9 10 11 E F R Design No. Nominal Product Code EFR Applications Type Ultrasonic R For reception use U Standard Type Ceramic Sensors T For transmission use H Compact Type S Q Design, Specifications are subject to change without notice. 25K 25 kHz 40K 40 kHz Temperature Stable Type Enclosed Type 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 Frequency Construction of Element B Bimorph Type Ultrasonic Ceramic Sensors ■ Ratings and Characteristics Type Part No. Item Nominal Frequency (kHz) Sensitivity (dB) Sound Pressure Level (dB) Bandwidth ✽ ✽✽ (kHz) Application Maximum Input Voltage (Vrms) Operating Temperature Range EFRRUB40K5 EFRTUB40K5 EFRRUB25K5 EFRTUB25K5 40.0 40.0 25.0 25.0 Ð45 min. Ñ Ð45 min. Ñ Ñ 112 min. Ñ 105 min. 4.0 min. 4.0 min. 2.5 min. 2.5 min. Receiver Transmitter Receiver Transmitter Ñ 20 Ñ 20 (ûC) Type Part No. Item Nominal Frequency (kHz) Sensitivity (dB) Sound Pressure Level (dB) Bandwidth ✽ ✽✽ (kHz) Application Maximum Input Voltage (Vrms) Operating Temperature Range Ð20 to 60 Compact Type Item Nominal Frequency (kHz) Sensitivity (dB) Sound Pressure Level Bandwidth (dB) ✽ ✽✽ (kHz) Application Maximum Input Voltage Operating Temperature Range (Vrms) (ûC) Temperature Stable Type EFRRHB40K5 EFRTHB40K5 EFRRSB40K5 EFRTSB40K5 40.0 40.0 40.0 40.0 Ð47 min. Ñ Ð50 min. Ñ Ñ 110 min. Ñ 105 min. 4.0 min. 4.0 min. 4.0 min. 4.0 min. Receiver Transmitter Receiver Transmitter Ñ 20 Ñ 20 (ûC) Type Part No. ✽ 0 dB=1 V/Pa Standard Type Ð20 to 60 Ð40 to 100 Enclosed Type EFRRQB40K5 EFRTQB40K5 40.0 40.0 Ð55 min. Ñ Ñ 105 min. 1.0 min. 1.0 min. Receiver Transmitter Ñ 20 Ð20 to 60 ✽✽ 0 dB=2×10Ð5 Pa 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 EF73 Ð Ultrasonic Ceramic Sensors ■ Dimensions in mm (not to scale) Type U Standard Type 13.0 ± 0.5 f Type S TemperatureStable Type 10.0 ± 0.5 13.0 ± 0.5 f f 10.0 ± 1.5 f 18.0 ± 0.5 12.0 ± 0.5 9.5 ± 0.5 2-f 0.8 ± 0.1 12.0 ± 0.5 16.0 ± 0.5 f 12.6 ± 0.5 21.0 ± 1.0 12.0 ± 0.5 f 15.6 ± 1.0 16.0 ± 0.5 24.5 ± 1.0 Screen Screen f Type Q Enclosed Type 21.0 ± 1.0 f Type H Compact Type 2-f 1.2 ± 0.1 2-f 1.2 ± 0.1 2-f 0.8 ± 0.2 8.0 ± 0.5 10.0 ± 0.5 10.0 ± 0.5 7.5 ± 0.5 ■ Test Circuits Diagram Test Circuit Diagram for Transmitter Test Circuit Diagram for Receiver feed back 30cm Amp. 30 cm Amp. SCM Ein Rec. Osc. Osc. Tw. UCS Silent Box Rec. RL SCM UCS Amp. 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 [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. Design, Specifications are subject to change without notice. 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 [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 × 10Ð5Pa is 0 dB. 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 Ultrasonic Ceramic Sensors ■ Typical Characteristics Frequency Characteristics (Sound Pressure Level) Frequency Characteristics (Sensitivity) Type U / H Type U / H Sensitivity (dB) Output S.P.L. (dB) TypeS Ð40 Ð45 Ð50 Ð55 TypeQ 35 40 115 TypeS 110 105 100 TypeQ 35 45 40 EFRRUB25K EFRTUB25K 115 Output S.P.L.(dB) Ð35 Sensitivity (dB) 45 Frequency (kHz) Frequency (kHz) Ð40 Ð45 Ð50 Ð55 20 25 110 105 100 95 20 30 25 30 Frequency (kHz) Frequency (kHz) Directivity Type U/H/S Type Q 0 dB= Ð41 dB ft Le R ig ht 0û 15û 15û 30û ft e L 30û 0 45û 15¡ 0 30¡ 45û 60û -20 0 Ð10 Ð30 Ð50 75û 75¡ Ð30 Ð10 75¡ Ð30 Ð40 90û 0 60¡ Ð20 -40 90û 45¡ Ð10 60¡ -30 75û R ig h t 0 45¡ -10 60û 15¡ 30¡ 90¡ Attenuation (dB) 0 Ð10 Ð30 Ð50 Ð30 Ð10 0 90¡ Attenuation (dB) Characteristic Change vs. Load Resistance Type U/H/S Type Q (40 kHz) Ω 10 k Ð35 Ω Sensitivity (dB) Sensitivity (dB) 100 k Ð30 Ω 3.9 k Ð40 Ð45 Ω 1 k Ð50 Ð30 100 k Ð35 10 k Ð40 Ω Ω Ω Ω 3.9 k Ð45 1 k Ð50 Ð55 Ð55 35 40 35 45 Design, Specifications are subject to change without notice. 40 Frequency (kHz) Frequency (kHz) 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 45 Ultrasonic Ceramic Sensors Application Notes 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. 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✽ sheets or cushions for absorption of mechanical stresses such as shock and vibration. 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. ✽Except sulfurated rubber 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