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intrinsically safe 378b02 microphone and preamplifier, atex, iecex, etl, anzex, approved

ICP MICROPHONE SYSTEM

Model EX378B02

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Intrinsically safe 378B02 microphone and preamplifier, ATEX, IECEx, ETL, ANZEx, approved

INDUSTRY EXCLUSIVE 1/2" prepolarized condenser microphone system. It is Hazardous Locations & Explosive Atmospheres compliant and can safely be employed in gaseous hazardous environments where standard microphones may cause a spark and fire.

The EX378B02 includes a 1/2" Free-field microphone cartridge, preamplifier, and system calibration, compliant with Intrinsic Safe

Nominal Microphone Diameter: 1/2"
Frequency Response Characteristic: Free-Field
Frequency Range: (±2dB)3.75 to 20000 Hz (3.75 to 20000 Hz)
Inherent Noise: 15.5 dB(A) re 20 µPa
Dynamic Range: 137 dB re 20 µPa

Specification Notes

[1] Typical.
[2] re 250 Hz
[1] Typical.
[2] re 250 Hz
[3] Prepolarized
[1] Typical.
[4] Venting through Preamp.
[5] See PCB Declaration of Conformance PS172 for details.

	English:	SI:
Performance
Nominal Microphone Diameter	1/2"	1/2"
Frequency Response Characteristic (at 0° incidence)	Free-Field	Free-Field
Sensitivity (±1.5 dB)	-26 dB re 1 V/Pa	-26 dB re 1 V/Pa	[2]
Sensitivity	50 mV/Pa	50 mV/Pa	[2]
Frequency Range (±2 dB)	3.75 to 20000 Hz	3.75 to 20000 Hz
Frequency Range (±1 dB)	7 to 10000 Hz	7 to 10000 Hz
Lower Limiting Frequency (3)	1.0 to 3.0 Hz	1.0 to 3.0 Hz
Inherent Noise	15.5 dB(A) re 20 µPa	15.5 dB(A) re 20 µPa	[1]
Dynamic Range (3% Distortion Limit)	137 dB re 20 µPa	137 dB re 20 µPa	[1]
Environmental
Temperature Range (Operating)	-40 to +176 °F	-40 to +80 °C
Temperature Coefficient of Sensitivity (+14 to +158°F (-10 to +70°C))	0.005 dB/°F	0.009 dB/°C	[1] [2]
Static Pressure Coefficient	-0.013 dB/kPa	-0.013 dB/kPa	[1] [2]
Humidity Coefficient of Sensitivity (0 to 100%, non-condensing)	±0.001 dB/%RH	±0.001 dB/%RH	[2]
Influence of Axial Vibration (0.1g (1 m/s²))	63 dB re 20 µPa	63 dB re 20 µPa	[1]
Electrical
Polarization Voltage	0 V	0 V	[3]
Excitation Voltage	20 to 30 VDC	20 to 30 VDC
Constant Current Excitation	2 to 20 mA	2 to 20 mA
Output Bias Voltage	10 to 14 VDC	10 to 14 VDC
Maximum Output Voltage	±7 Vpk	±7 Vpk
Output Impedance	<50 Ohm	<50 Ohm
Physical
Housing Material	Stainless Alloy	Stainless Alloy
Venting	Rear	Rear	[4]
Electrical Connector	BNC Jack	BNC Jack
Mounting Thread (Grid)	0.5 - 60 UNS	0.5 - 60 UNS
Size - Diameter (with grid)	0.52 in	13.2 mm
Size - Diameter (without grid)	0.50 in	12.7 mm
Size - Height (with grid)	4.02 in	102.1 mm
Size - Height (without grid)	3.99 in	101.2 mm
Weight	1.87 oz	53 gm	[1]