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

s

Dimensions in mm (not to scale)

s

Test Circuits Diagram

RL

: 3.9 kΩ

UCS : Ultrasonic Ceramic Sensor

SCM : Standard Condenser Microphone BrŸel & Kj¾r 4135

Amp. : Amplifier

BrŸel & Kj¾r 2606

Osc. : Oscillator

BrŸel & Kj¾r 1013

Rec. : Recorder

BrŸel & Kj¾r 2305

Tw. : Tweeter

UCS : Ultrasonic Ceramic Sensor

SCM : Standard Condenser Microphone BrŸel & Kj¾r 4135

Amp. : Amplifier

BrŸel & Kj¾r 2606

Osc. : Oscilator

BrŸel & Kj¾r 1013

Rec. : Recorder

BrŸel & Kj¾r 2305

Ein

: 10 Vrms.

Ultrasonic Ceramic Sensors

10.0±0.5

2-f 1.2±0.1

f 16.0±0.5

f 13.0±0.5

Screen

7.5±0.5

2-f 0.8±0.2

f 18.0±0.5

f 10.0±1.5

8.0±0.5

f 12.6±0.5

f 10.0±0.5

2-f 0.8±0.1

10.0±0.5

2-f 1.2±0.1

f 16.0±0.5

f 13.0±0.5

Screen

feed back

Osc.

Silent Box

Amp.

RL

Amp.

Rec.

30 cm

SCM

UCS

Tw.

Freq.

Counter

Test Circuit Diagram for Receiver

Silent Box

Amp.

30cm

SCM

UCS

Freq.

Counter

Test Circuit Diagram for Transmitter

Rec.

Osc.

Ein

[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

Type U

Type H

Type S

Type Q

Standard Type

Compact Type

TemperatureStable Type

Enclosed Type

[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.