1/2-inch Measurement Microphone
MI Series |
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The MI series 1/2 condenser measurement microphones have a
high-sensitivity type and wide-bandwidth type for a variety of
applications, and provide higher performance in environmental
stability with regard to temperature and humidity by infixing
titanium diaphragm with laser welding.
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nMI-1235/1433:
1/2-inch Back electret-type Measurement microphone |
New!
MI-1235 |
New!
MI-1433 |
These
models are best to be used as measurement and analysis for
environmental noise, architectural acoustics, and radiated sound
from electrical/mechanical instruments. A bias power supply is not
required since it is a back electret-type microphone. There are two
types to be selected; the MI-1235, which is being designed to
emphasize on a wide frequency range of 10 Hz to 20 kHz, conforms to
IEC 61094-4 Type WS2F. The MI-1433 is a cost effective one achieving
excellent environmental resistance same as the MI-1235 with
frequency range of 20 Hz to 8 kHz. It conforms to IEC 61094-4 Type
WS2F. Both models are used with the MI-3111 and MI-3310. |
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nMI-1211 1/2-inch
Bias-type Measurement microphone |
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MI-1211
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The MI-1211, a bias-type
microphone with high sensitivity, is ideal for measurement of low
level noise. New technology of infixing titanium diaphragm with
laser welding directly makes it possible to achieve wide range, high
sensitivity and high stability. Voltage needs to be supplied as it
is a bias-type microphone. |
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Connection Diagram
Each product in the analyzer
section in the below configuration is linked to its HTML page.
Specifications
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1/2-ich back electret type |
|
Model |
MI-1235 |
MI-1433 |
MI-1234
<Discontinued>
|
MI-1432
<Discontinued>
|
|
Frequency range |
10 Hz to 20 kHz |
20 Hz to 8 kHz |
20 Hz to 20 kHz |
20 Hz to 8 kHz |
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Standard |
IEC 61094-4 Type WS2F
（Structure of the electrodes part ＜joint part with the
preamplifier＞） |
IEC 61094-1 Type LS2F
（Structure of the electrodes part ＜joint part with the
preamplifier＞） |
| Response
type |
Sound field type |
|
Bias voltage |
0V |
| Sensitivity |
- 29 ± 3 dB
(re. 1V/Pa) |
| Capacitance |
13 pF |
12.5 pF |
|
Maximum sound pressure |
143 dB or more
(MI-3310 in used) |
140 dB or more
(MI-3310 in used) |
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Intrinsic noise level |
19 dB or less (A-weighting) |
|
Static pressure
characteristics |
-0.03 dB/kPa |
- |
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Operating temperature range |
-10 to +50 °C |
|
Operating humidity range |
20 to 90%RH
(with no condensation) |
30 to 90%RH
(with no condensation) |
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Temperature characteristics |
+0.009 dB/K or less |
+0.01 dB/K or less |
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Humidity characteristics |
0.001 dB/% RH or less |
0.003 dB/% RH or less |
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Storage temperature range |
-20 to +60 °C |
|
Storage humidity range |
20 to 90 %RH (with no condensation) |
| Outer
dimension |
Φ13.2 x 13.7 mm |
Φ13.2 x 13.5 mm |
Φ13.2 x 13.7 mm |
Φ13.2 x 13.2 mm |
| Weight |
Approx. 6 g |
|
Accessories |
Instruction manual x 1, calibration chart x 1copy |
| |
1/2-ich bias type |
1/2-ich back electret type |
|
Model
|
MI-1211 |
MI-1233
＜Discontinued> |
MI-1431
＜Discontinued> |
|
Frequency range |
20 Hz to 14 kHz |
20 Hz to 20 kHz |
20 Hz to 8 kHz |
| Response
type |
Sound field type |
| Bias
voltage |
200 V |
0 V |
| Sensitivity |
-20 dB ± 1.5 dB
(0 dB=1 V/Pa) |
-29 dB ± 3 dB
(0 dB=1 V/Pa) |
| Capacitance |
12 pF ± 1 pF |
11 pF ± 2 pF |
| Max.
sound pressure |
132 dB
(when used with MI-3310 preamplifier) |
140 dB
(when used with MI-3310 preamplifier) |
|
Intrinsic noise level |
12 dB (A) or less |
19 dB (A) or less |
20 dB (A) or less |
|
Operating temperature range |
-10 to +50 °C |
|
Operating humidity range |
30 to 90%RH
(with no condensation) |
|
Temperature
characteristics |
0.007 dB/°C or less |
0.01 dB/°C or less |
0.012 dB/°C or less |
| Humidity
characteristics |
0.003 dB/% RH or less |
0.005 dB/% RH or less |
| Secular
change |
0.1 dB/year or less |
0.2 dB/year or less |
|
Storage temperature range |
-20 to +80 °C |
-20 to +60 °C |
|
Storage humidity range |
0 to 90 %RH (with no condensation) |
| Outer
dimensions |
Φ13.2 x 15.2 mm |
Φ13.2 x 13.5 mm |
Φ
13.2 x 12.9mm |
| Weight |
Approx. 5 g |
Revised: 2012/04/02
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