328ER250

Transducer, Receiver, Ultrasonic, Receiver, 113 dB

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: PROWAVE
Product type: Piezo Transducers
Product Range: 328Ex250
Sound Level SPL: 113dB
Resonant Frequency: 32.8kHz
Transducer Function: Receiver
Sound Level Distance: 30cm

Delivery and price
Units per pack	50
Price	15.25 €
Current stock	10+
Lead time	30 days

Datasheet

Electra House, 32 Southtown Road Great Yarmouth, Norfolk NR31 0DU, England 

Telephone +44 (0)1493 602602 Fax +44 (0)1493 665111 Email:sales@midassensors.com www.midassensors.com 

## **PROWAVE** 

## **Air Ultrasonic Ceramic Transducers** 

## **328ET/R250** 

## **Dimensions:** dimensions are in mm 

## **Impedance/Phase Angle vs. Frequency** 

## **Specification** 

Tested under 1Vrms Oscillation Level 328ER250 Impedance 328ER250 Phase 328ET250 Impedance 328ET250 Phase 

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100000 90<br>75<br>60<br>ee 45<br>10000 attdt i 3015<br>SGneeeget 0<br>6 ———= -15<br>1000 -30<br>-45<br>MN -60<br>100 2a | -75-90<br>28 29 30 31 32 33 34 35 36 37 38<br>Frequency (Khz)<br>Sensitivity/Sound Pressure Level<br>Tested under 10Vrms @30cm<br>-50 130<br>-55 PET TET ET EET Ey ty yyy 125<br>-60 PP ETT eye yy eT 120<br>-65 ptt TT PAWN TET TT TT 115<br>-70 PIT TIAL IAIN 110<br>-75 105<br>Peet] TTT<br>-80 p= 72aes| | | NAT I 100<br>-85 Pit | 95<br>-90 PET eTTeyyeeye T e y terE y etPREet 90<br>28 29 30 31 32 33 34 35 36 37 38<br>Frequency (Khz)<br>Impedance (Ohm)<br>Phase Angle (Degree)<br>SPL (dB)<br>Sensitivity (dB)<br>**----- End of picture text -----**<br>


|**328ET250**<br>**328ER250**<br>**Center Frequency**<br>**Bandwidth**(-6dB)<br>328ET250|Transmitter<br>Receiver<br>32.8±1.0Khz<br>1.0Khz|
|---|---|
|328ER250|1.0Khz|
|**Transmitting Sound Pressure**|113dB min.|
|**Level**<br>at 32.8Khz; 0dB re 0.0002µbar<br>per 10Vrms at 30cm||
|**Receiving Sensitivity**<br>at 32.8Khz 0dB = 1 volt/µbar<br>**Capacitance**at 1Khz±20%<br>**Max. Driving Voltage**(cont.)<br>**Total Beam Angle**<br>-6dB|-67dB min.<br>2400 pF<br>20Vrms<br>33°typical|
|**Operation Temperature**|-30 to 80°C|
|**Storage Temperature**|-40 to 85°C|



## **Sensitivity/Sound Pressure Level** 

Tested under 10Vrms @30cm 

**Beam Angle** : Tested at 32.8Khz frequency 

All specification taken typical at 25 ° C Closer frequency tolerance can be supplied upon request. 

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 0<br> 330  30<br>upon request. Af  0 -6  \»<br> 300 -12   60<br>CP IA<br>Model available: -18 -24<br> 270 [Taa e stan -30  a 90<br> 240 W\ \ KZ AN a asae J  120<br>1 328ET/R250 Aluminum Housing<br> 210  150<br>2 328ET/R25B Black Alum. Housing  180<br>**----- End of picture text -----**<br>


**Air Ultrasonic Ceramic Transducers** 

**PROWAVE** 

**328ET/R250** 

## **328ER250 Receiver** 

## **328ET250 Transmitter** 

## **Sensitivity Variation vs. Loaded Resistor** 

## **SPL Variation vs. Driving Voltage** 

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-40<br>-45<br>-50<br>-55<br>-60<br>-65<br>-70<br>-75<br>-80<br>1K 3.9K 10K 39K 100K 390K<br>Loaded Resistor (Ohm)<br>Sensitivity (dB)<br>**----- End of picture text -----**<br>


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130<br>125<br>120<br>115<br>110<br>Max. Driving Voltage (Cont.) 20Vrms<br>105<br>100<br>95<br>90<br>0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30<br>Vrms<br>SPL (dB)<br>**----- End of picture text -----**<br>


## **Center Frequency Shift vs. Loaded Resistor** 

## **Center Frequency Shift vs. Driving Voltage** 

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5.0<br>4.0<br>3.0<br>2.0<br>1.0<br>0.0<br>-1.0<br>-2.0<br>-3.0<br>-4.0<br>-5.0<br>1K 3.9K 10K 39K 100K 390K<br>Loaded Resistor (Ohm)<br>Sensitivity Variation vs. Temperature<br>-40<br>-45<br>-50<br>-55<br>-60<br>-65<br>-70<br>-75<br>-80<br>-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100<br>Temperature (Degree C)<br>Fc Variation %<br>Sensitivity (dB)<br>**----- End of picture text -----**<br>


## **Sensitivity Variation vs. Temperature** 

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0.0<br>-1.0<br>-2.0<br>-3.0<br>-4.0<br>Max. Driving Voltage (Cont.) 20Vrms<br>-5.0<br>-6.0<br>-7.0<br>0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30<br>Vrms<br>SPL Variation vs. Temperature<br>130<br>125<br>120<br>115<br>110<br>105<br>100<br>95<br>90<br>-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100<br>Temperature (Degree C)<br>Fc Variation %<br>SPL (dB)<br>**----- End of picture text -----**<br>


## **SPL Variation vs. Temperature** 

## **Center Frequency Shift vs. Temperature** 

## **Center Frequency Shift vs. Temperature** 

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5.0 5.0<br>4.0 4.0<br>3.0 3.0<br>2.0 2.0<br>1.0 1.0<br>0.0 0.0<br>-1.0 -1.0<br>-2.0 -2.0<br>-3.0 -3.0<br>-4.0 -4.0<br>-5.0 -5.0<br>-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100<br>Temperature (Degree C) Temperature (Degree C)<br>Fc Variation % Fc Variation %<br>**----- End of picture text -----**<br>

Updated at February 9, 2023

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