Products

PROBE MICROPHONE ICP®

Model 377B26

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Units in Stock	Lead Times
More on the way	Lead Time for 1-5 is 5 Wks.

Probe Microphone ICP®

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Frequency Range: (+2.2/-4.9dB)2 to 20000 Hz
Inherent Noise: 44 dB(A) re 20 µPa
Dynamic Range: (3% Distortion Limit)165 dB re 20 µPa

Specification Notes

[1] Typical.
[2] Individually calibrated with 20mm probe tip.
[3] Individually calibrated with 20mm probe tip (20 Hz to 20 kHz).
[4] 20mm probe tip.
[5] 25mm probe tip.
[6] G.R.A.S. data derived from 40SC Product Manual, Revision 31 07 2007.
[7] Bruel & Kjaer data derived from 4182 Product Datasheet, BP 0659-15 95/04.
[8] Information based on published specifications of G.R.A.S. and Bruel & Kjaer at time of posting
[1] Typical.
[9] With heat sink.
[10] Probe microphone body.
[11] At probe tip end
[12] Prepolarized
[1] Typical.
[13] See PCB Declaration of Conformance PS076 for details.

	English:	SI:
Performance
Sensitivity (±2dB)(at 250 Hz) )	-53.35 dB re 1 V/Pa	-53.35 dB re 1 V/Pa	[2]
Sensitivity (at 250 Hz)	2.15 mV/Pa	2.15 mV/Pa	[2]
Frequency Range (+2.2/-4.9 dB)	2 to 20000 Hz	2 to 20000 Hz	[3]
Frequency Response.	See Graph	See Graph	[4] [5] [6] [7] [8]
Lower Limiting Frequency (-3 dB)	0.25 to 3.0 Hz	0.25 to 3.0 Hz
Inherent Noise	44 dB(A) re 20 µPa	44 dB(A) re 20 µPa	[1]
Dynamic Range(3% Distortion Limit)	165 dB re 20 µPa	165 dB re 20 µPa	[1]
Environmental
Temperature Range (Operating)	-40 to +158 °F	-40 to +70 °C	[10]
Temperature Range (20mm Probe Tip)	-40 to +752 °F	-40 to +400 °C	[11]
Temperature Range (40mm Probe Tip)	-40 to +1472 °F	-40 to +800 °C	[9] [11]
Temperature Range (80mm Probe Tip)	-40 to +1472 °F	-40 to +800 °C	[9] [11]
Temperature Range (160mm Probe Tip)	-40 to +1472 °F	-40 to +800 °C	[9] [11]
Influence of Axial Vibration (0.1g (1 m/s²))	62 dB re 20 µPa	62 dB re 20 µPa	[1]
Electrical
Polarization Voltage	0 V	0 V	[12]
Excitation Voltage	20 to 32 VDC	20 to 32 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	+/-8 Vpk	+/-8 Vpk
Output Impedance	<50 Ohm	<50 Ohm
Physical
Housing Material	Stainless Steel	Stainless Steel
Probe Material	Stainless Steel	Stainless Steel
Electrical Connector	BNC Jack	BNC Jack
Size - Diameter	0.5 in	12.7 mm
Size - Length	4.4 in	111 mm
Weight	1.9 oz	55 gm	[1]

* All specifications are at room temperature unless otherwise specified.

Accessories


Supplied
012A10	Low-cost, black coaxial cable (RG58/U), 10-ft, BNC plug to BNC plug	1
100-11129-30		1
100-11509-90		1
51606-01		1
51607-01		1
51607-02		1
53434-01		1
53434-02		1
53434-03		1
53434-04		1
54073-01		1
55103-01		1
55454-01		1
55455-01		1
56508-01		1
ACS-42	Calibration of a Series 377 (Type 1) microphone & preamp, as mated pair	1