GRAS 26AI 1/2'' Preamplifier with Integrated Connector, Low Frequency
Freq range: 1 Hz to 200 kHz
Noise: 1.8 µV
Gain: -0.29 dB
Special feature: Low frequency applications
Technology
Introduction
GRAS26AI is a preamplifier designed for low-frequency applications in the laboratory and field and accommodates directly for all IEC 61094 standardized 1/2" externally polarized measurement microphones.
It is rugged and reliable and can handle microphone signals up to 50 Vpeak within 1 Hz to 200 kHz. The printed circuit board is made by use of thick-film substrate technology and optimized with respect to maximum suppression of microphonics and moisture rejection.
The high-quality, standard 7-pin LEMO male connector is integrated into the preamplifier and ensures that only one type of connector and cable is required for both connection and extension.
26AI is factory calibrated individually and delivered with a calibration chart stating its A-weighted and linear self-noise.
Compatibility
These preamplifiers are compatible with 1/2-inch microphones as defined in international standard IEC1094 Measurement Microphones, Part 4: Specifications for working standard microphones. The mounting thread (11.7 mm - 60 UNS-2) is compatible with other available makes of similar microphone preamplifiers.
GRAS 26AI is provided with an integrated 7-pin LEMO series 1B plug.
Specifications
Conditions: 23 °C Ambient temperature, ±60V/+120V power supply, 18 pF dummy microphone, 3 m output cable.
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Dimensions
Ordering info
Optional items
| GRAS AA0008 |
3 m LEMO 7-pin - LEMO 7-pin Cable |
| GRAS AA0020-CL |
Customized Length LEMO 7-pin - LEMO 7-pin Cable |
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1/2" Microphone Holder, POM |
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1/2" Microphone Holder, Stainless Steel |
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Swivel head |
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Tripod |
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Adapter for 1/4" microphone and 1/2" preamplifier |
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Adapter for 1" microphone and 1/2" preamplifier |
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Right-angled (90º) Adapter for 1/2" Microphone and 1/2" Preamplifier |
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20 dB Attenuator for externally polarized 1/2" microphones |
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20 pF Preamplifier-input Adapter for 1/2" preamplifiers |
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2-Channel Power Module with gain, filters and SysCheck generator |
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2-Channel Universal Power Module with signal conditioning and PC interface |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
