Sennheiser Electronic Corp.
Operating Principle In the optical microphone, light from an LED is directed onto a reflective diaphragm via an optical-fibre cable (transmitter optical waveguide). The membrane reflects part of the light into a receiver optical waveguide. If the diaphragm is moved by sound signals, a displacement of the reflected light beam occurs, with the result that more or less light is coupled into the receiver waveguide. At the end of the receiver waveguide, a photodiode converts the light intensity variations into electric signals. The system complies with the requirements regarding intrinsically safe optical radiation according to EN 60079-0:2004 and EN 60079-28:2007. It also meets the requirements of the ATEX Directive on explosion protection, which was documented with the Type Examination Certificate TUV 07 ATEX 553824 and TUV 07 ATEX 553825X. This certification allows the IAS MO 2000 SET to be used in potentially explosive atmospheres of Zone 1 (e.g. gas processing plants). The IAS MO 2000 SET has the degree of protection IP 54 (5= protection against dust deposits, 4= protection against splashing water from all directions) and is therefore ideally suited for outdoor applications. Advantages The optical principle is the only microphone principle in which the microphone head and the electronics can be located far away from each other. The component parts of the MO 2000 H acoustic-optical microphone head (external diameter 1/2") are made of a plastic material that is suitable for use in areas with aggressive substances (gases, salts, humidity) and radiation. All components of the microphone head, including the optical waveguides, are free of metal; no electric current flows. Applications These advantages make it possible to use the optical microphone in areas in which other microphones are not suitable. For example, the optical microphone can be used in potentially explosive atmospheres, such as for the acoustic monitoring of gas drying plants in natural gas production (IAS MO 2000 SET). In this case, the microphone can "hear" slow leaks, which, due to their small size, cause neither a pressure loss nor an alarm message in the other monitoring systems. In medical applications, the microphone is ideal for use in magnetic resonance imaging (MRI), for example to maintain communication with the patient during MRI scans or to achieve active noise cancellation in MRI.
Delivery includes:
1 optical microphone with MO 2000 H optical cable (3 m)
1 MO 2000 CU central unit
1 power supply with various adapters (EU, UK, US)
1 carrying case
1 operating instructions
1 MZWW 2000 weather protection incl. assembly accessories
1 GA 2 rack adapter
Sennheiser Electronic Corp.
Operating Principle
In the optical microphone, light from an LED is directed onto a reflective diaphragm via an optical-fibre cable (transmitter optical waveguide). The membrane reflects part of the light into a receiver optical waveguide. If the diaphragm is moved by sound signals, a displacement of the reflected light beam occurs, with the result that more or less light is coupled into the receiver waveguide. At the end of the receiver waveguide, a photodiode converts the light intensity variations into electric signals.
The system complies with the requirements regarding intrinsically safe optical radiation according to EN 60079-0:2004 and EN 60079-28:2007. It also meets the requirements of the ATEX Directive on explosion protection, which was documented with the Type Examination Certificate TUV 07 ATEX 553824 and TUV 07 ATEX 553825X. This certification allows the IAS MO 2000 SET to be used in potentially explosive atmospheres of Zone 1 (e.g. gas processing plants). The IAS MO 2000 SET has the degree of protection IP 54 (5= protection against dust deposits, 4= protection against splashing water from all directions) and is therefore ideally suited for outdoor applications.
Advantages
The optical principle is the only microphone principle in which the microphone head and the electronics can be located far away from each other.
The component parts of the MO 2000 H acoustic-optical microphone head (external diameter 1/2") are made of a plastic material that is suitable for use in areas with aggressive substances (gases, salts, humidity) and radiation. All components of the microphone head, including the optical waveguides, are free of metal; no electric current flows.
Applications
These advantages make it possible to use the optical microphone in areas in which other microphones are not suitable.
For example, the optical microphone can be used in potentially explosive atmospheres, such as for the acoustic monitoring of gas drying plants in natural gas production (IAS MO 2000 SET). In this case, the microphone can "hear" slow leaks, which, due to their small size, cause neither a pressure loss nor an alarm message in the other monitoring systems.
In medical applications, the microphone is ideal for use in magnetic resonance imaging (MRI), for example to maintain communication with the patient during MRI scans or to achieve active noise cancellation in MRI.
- Delivery includes:
- 1 optical microphone with MO 2000 H optical cable (3 m)
- 1 MO 2000 CU central unit
- 1 power supply with various adapters (EU, UK, US)
- 1 carrying case
- 1 operating instructions
- 1 MZWW 2000 weather protection incl. assembly accessories
- 1 GA 2 rack adapter
