Microphone Disc GM50 for BATmode systems
Electret Ultrasonic Microphone Disc with Test Signal Speaker for mounting in the nacelle floor of wind turbines or on a tripod.
The GM50 microphone disc from Avisoft Bioacoustics is a very versatile microphone. With the built-in ultrasonic capsule Knowles FG-23629-P16, the integrated microphone heater and preamplifier as well as a 40kHz test signal speaker, it offers all the features of the bigger microphone GM90 in terms of frequency response, directional characteristics, noise level, condensation avoidance and microphone sensitivity logging. In addition, due to the removable mounting plate, the microphone disc can not only be used for mounting in the floor of wind turbine nacelles, but also with the optional tripod for alternative measurements (not on wind turbines). However, due to the lack of a wind protection ring and the changed dimensions compared to the GM90, the GM50 microphone disc is not compatible with the software tool Probat for calculating shutdown times.
To protect against weather and environmental conditions, all electronic components in the aluminum made microphone disc are splash-proof.
Main features
- Knowles FG - Microphone capsule
- 40kHz test signal speaker
- Integrated microphone heating
- Removable mounting plate
- ∅ 50mm (outer diameter) / ∅ 90mm (mounting plate)
- Installation in the floor of the nacelle of wind turbines via 55mm drill-hole
- Alternative use (not on wind turbines) with optional tripod
Specifications
- Knowles FG - Microphone capsule
- 40kHz test signal speaker
- Microphone heating
- Approximate input-referred self-noise level (bandwidth: 30-50 kHz): 26 dB SPL
- Approximate sensitivity: 500mV / Pa
- Power supply: 5V, 25 mA (provided by UltraSoundGate x16Hnbm)
- Microphone / heating connector: male XLR-5 plug
- Test signal speaker connector: male XLR-4 plug
- ∅ 50mm (without mounting plate) / ∅ 90mm (with mounting plate)
- Nacelle floor installation with 55mm drilling-hole and included mounting plate
- Alternative use with optional tripod
- Length cable set: 2m
Delivery & Returns
Shipping is calculated at checkout based on order weight, product type and delivery postcode. Prices exclude VAT.
Delivery times
| UK mainland | 1 to 3 working days for orders placed before 2pm |
| Scotland, Northern Ireland & UK offshore areas | 2 to 5 working days for orders placed before 2pm |
| Europe | 3 to 5 working days for orders placed before 2pm |
| Rest of world | 7 to 14 working days for orders placed before 2pm |
Delivery costs
UK mainland: delivery starts from £7.92.
Highlands and Islands: delivery starts from £25.
Northern Ireland: delivery starts from £20, rising to £90 for orders up to 60kg.
Larger orders, pallet deliveries and some offshore or international deliveries may require a quote.
For European orders, please visit wildcare.eu, call +33 (0)4 65 65 00 05 or email [email protected].
Need it by a certain date?
Please tell us when ordering. For urgent orders, call 01451 833181.
Returns
If your order arrives damaged or incorrect, please contact us within 5 working days.
A Returns Number may be required before sending goods back. Call 01451 833181 or email [email protected].
Please see our full returns policy for more information.
