Works from infrasound to ultrasound with high sensitivity and low noise. The RG-50 microphone is an affordable choice for acoustic measurements. It can be used with any instrument that has an IEPE constant current supply. It meets the Class 1 WS3F IEC 61094-5 specification.
The RG-50 IEPE microphone is perfect for engineers and technicians in many fields, including industrial acoustics, automotive testing, and aerospace. It’s perfect for capturing frequencies from 5 Hz to 30 kHz.
We believe that the RG-50 measurement microphone, with its high sensitivity of 50 mV/Pa, is the only 1/4″ ultrasonic microphone currently available on the market.
Technical data: | Free-field |
|---|---|
Transducer type | Electrete pressure transducer |
Class 1 | WS3F according to IEC 61094-5 |
Polar pattern | Omni |
Frequency range | 5 Hz – 30 kHz (meets Type 1 free field limits) |
Sensitivity @ 1 kHz | 50 mV/Pa ± 0.5 dB |
Max. SPL for 1% THD at 1 kHz | 130 dB Peak |
Inherent noise | 26 dB(A) |
Output impedance | <50 Ohm |
Current consumption | 2-6 mA |
Power supply | 18 V DC to 30 V DC |
Bias: | 12.5 Volt |
Temperature range, operation | -20°C to +80°C |
Heat resistant | up to 110 °C |
Diameter | 7 mm ± 0.05 mm |
Length | 93 mm |
Weight | 23 g |
Connector | BNC (fem.) |
Applications:
- Ultrasound
- Product noise
- Ambient noise
- Acoustic camera
- Sound power
RG-50SW Splash Proof IP55
The RG-50SW microphone is designed with splash water protection so that it can be used for measurement campaigns in wet or humid weather.
A water-repellent sealing of the membrane at the sound inlet, prevents the damage of the electret capsule by water.
The IEPE microphones with splash water protection, also MI21 and MI17SW, have proven themselves, among others, at brake manufacturers, who mount the microphone in the wheel housing to record disturbing brake noises.
- Price: 588 $
RG-50 Frequency Response Up to 30 kHz
Comparison of ultrasonic microphones
In the following we present a comparative measurement of the 1/4-inch ultrasonic microphones RG-50 and MM310.
The measurement is made with a 2-channel high-performance RME ADI-2/4 PRO SE transducer and the two-channel IEPE power supply type MC102A.
The NVH FFT analysis software controls the RME high-performance transducer via the ASIO interface with a sampling rate of 384 kHz and is calibrated with a microphone calibrator before the measurement.
The compressed air from a compressor is used as the ultrasonic sound source.
Model | Description | Price |
|---|---|---|
 | ROGA Instruments products are free from planned obsolescence, technically accessible, durable and repairable. | |
POM-MI1921 | MI19 and MI21 microphone sleeve adapter from 1/4″ inner diameter to 1/2″ outer diameter. POM material to ensure galvanic isolation to prevent ground and earth loops | 24 $ |
POM-MI17RG50 | MI17 and RG-50 microphone sleeve adapter to 1/2″ outer diameter. POM material to ensure galvanic isolation to prevent ground and ground loops | 24 $ |
MicCAL | Microphone Calibration Fee for ROGA Instruments microphones MI15 | MI17 | MI18 | MI19 | MI21| RG-50 | MP30| MP40 After successful factory calibration, the microphone is returned to the customer with our factory calibration certificate. | 155 $ |
MicREP | Microphone Repair Fee for ROGA Instruments microphones MI15 | MI17 | MI18 | MI19 | MI21| RG-50 After successful repair and factory calibration, the microphone is returned to the customer with our factory calibration certificate. | 225 $ |
WS-RG-40 | 1/4″ microphone windscreen Ø 40 mm | 38 $ |
MI19 | MI19; ¼” electret microphone for industrial applications Sensitivity 50 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 20 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 30 dBA SPL Max 130 dB HS Code 85181000 | 385 $ |
MI19SW | IP55 splash water resistant ¼” electret microphone for industrial applications Sensitivity 50 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 20 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 30 dBA SPL Max 130 dB HS Code 85181000 | 455 $ |
RG-50HL | High SPL Microphone e.g. shooting noise WS3F Free-field IEC 61094-5 Total length: 95 mm Sensitivity 10 mV/Pa constant current Supply 2-20 mA BNC connection Polar pattern: omnidirectional Frequency response: 5 Hz – 4 kHz: ± 1 dB 4 kHz – 30 kHz: ± 1.5 dB factory calibration certificate included measuring range up to SPL 144 dBRMS / 150 dB peak HS Code 85181000 | 1275 $ |
MK342 E + MV310 Set | 1/4″ microphone with constant pressure frequency response WS3P according to IEC 61094-4 Pressure 3.5Hz to 70kHz 60dB(A) to 186dB pre-polarized HS Code 85181000 | 1480 $ |
MI21 | MI21; ¼” electret condenser microphone Splash Water Proof IP55 Sensitivity 50 mV/Pa / ± 1.0 dB CCP IEPE supply 2-6 mA BNC connector Polar pattern: omnidirectional Frequency response IEC 61094-5 20 Hz – 4 kHz: ± 0.5 dB 4 kHz – 20 kHz: ± 1.5 dB corresponds to class 1 Calibration sheet included Sensitivity & Frequency Response Inherent noise 26 dB(A) SPL Max 130 dB HS Code 85181000 | 588 $ |
MI17 | MI17; 1/4″ IEPE microphone, Sensitivity 50 mV/Pa, constant current supply 2-8 mA BNC connection Class 1 frequency response in accordance with IEC 61672 20 Hz – 20 kHz free field including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 30 dB (A) HS Code 85181000 | 425 $
|
MI17SW | MI 17SW; 1/4″ IEPE microphone Splash Water Proof IP55 Sensitivity 50 mV/Pa, constant current supply 2-8 mA BNC connection Frequency response: 20 Hz – 20 kHz: free field Class 1 frequency response in accordance with IEC 61672 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 30 dB (A) HS Code 85181000 | 495 $
|
RG-50 | RG-50; 1/4″ IEPE free field microphone Sensitivity 50 mV/Pa constant current supply 2- 20mA BNC connection Frequency response 5 Hz – 4 kHz: ± 0.5 dB 4 kHz – 30 kHz: ± 1.5 dB free field, corresponds to class 1 IEC 61094-5 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 26 dB (A) HS Code 85181000 | 543 $ |
RG-50SW | RG-50SW; 1/4″ IEPE Free-field microphone Sensitivity 50 mV / Pa constant current supply 2- 20mA BNC connection Splash Water Proof IP55 Frequency response 5 Hz – 4 kHz: ± 0.5 dB 4 kHz – 30 kHz: ± 1.5 dB free field, corresponds to class 1 IEC 61094-5 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 26 dB (A) HS Code 85181000 | 588 $ |
