The electret ultrasonic tower microphone TM20 was specially designed for mounting in the tower wall of large wind turbines for the qualitative detection of bat activity at the level of the lower rotor tips. While the focus of the tower microphone TM10 was on having the smallest possible diameter, the TM20 includes a 40kHz test signal speaker in addition to the microphone. As for the microphone discs for nacelles, this speaker is used to play a daily 40kHz test tone for checking and logging the microphone sensitivity during a continuous long-term monitoring. With a microphone diameter of only 20mm, the required diameter of the mounting hole of 22mm is still extremely small. For mounting in the tower wall, the optional TM20 - Mounting-Kit is available. The tripod of the Mounting-Kit slides along a rod, which is fixed to the microphone. Thus, the microphone can be easily fixed in tower walls with different wall thicknesses up to 450mm and allows a defined positioning of the microphone tip. The tripod is mounted on the tower inner wall using either magnetic feet, adhesive pads or screws (see the Drilling Plan - TM20 in Product Attachment). To prevent the ingress of rainwater through the mounting hole it can be drilled slightly sloping into the tower wall. To further increase the reliability of the microphone in adverse weather conditions, the TM20 integrates a microphone heater, which reduces condensation on the microphone. Due to the M3 mounting bolt on the back of the microphone, the microphone is also ideal for alternative measuring situations, such as on measuring masts, in addition to the use in the tower of wind turbines. Like all other microphones, the TM20 is compatible with BATmode 2S and BATmode 2S+ as well as the UltraSoundGate 116Hnbm and 416Hnbm from Avisoft Bioacoustics.
Note : To reduce electromagnetic interferences, we recommend to place the BATbox with the detection system as close as possible to the microphone hole and as far away as possible from interference sources such as power and control cables. For this the microphone is delivered with a 3m connection cable. In principle, it is also possible to install the BATbox on the tower base and to use an extended microphone cable. However, this may cause a significant reduction in recording quality.
Main features
- Knowles FG - Microphone capsule
- 40kHz test signal speaker
- Integrated microphone heating
- ∅ 20mm / Length 55mm
- M3 mounting bolt
- Tower wall mounting with TM20 - Mounting Kit available separately
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 / 25mA provided by UltraSoundGate xx16Hnbm
- Connector: male XLR-5 plug
- ∅ 20mm / Length 55mm
- Required bore hole ∅: 22mm
- M3 mounting bolt
- Cable length: 3m
- Tripod TM20-Mounting Kit optionally available for tower wall mounting
Shipping charges are calculated at checkout stage based on the total weight of your order, the type of product and delivery postcode. We aim for next working day delivery on all UK mainland orders received before 2:30pm.
Prices quoted below exclude VAT.
UK mainland delivery starts at £7.92. Pallet deliveries vary depending on your postcode.
Highlands and Islands delivery starts at £25. For larger orders and pallet loads you will need to contact us for a quote. The following postcodes and areas are considered to be Highlands and Islands:
AB36-38, AB55-56, FK17-21, HS all postcodes, IV all postcodes, KA27-28, KW1-17, PA20-78, PH19-50, ZE1-3
Channel Islands, Isle of Wight, Isle of Man, Scilly Isles
Northern Ireland delivery starts at £20 rising to £90 for orders up to 60kg. Please contact us for a quote for larger or palletised orders.
Europe: For European orders please visit www.wildcare.eu call us T. 04 65 65 00 05 or alternatively email us on ventes@wildcare.eu
How quickly will I get my order?
We aim for next working day delivery on all UK mainland orders received before 2.30pm. Where products need to be made to order or are not a regular stock item, or during busy times of year, despatch times may be longer.
Typical delivery times are:
- 1 to 3 working days within the UK.
- 3 to 5 working days within Europe.
- 7 to 14 working days for the rest of the world.
If delivery is likely to take longer than this we will let you know as soon as we become aware of the delay.
If you need an item by a particular date please tell us when you place the order - it if is urgent, we recommend you call us on 01451 833181 to place your order.
How will I know when my order has been dispatched?
We will email you confirmation after your order has been despatched. You might not receive this confirmation email if you made a spelling mistake when you entered your email address. Login and check your registered email address. Spam filters in your email program may also block this type of email. Please check your junk mail folders.
Will I receive online tracking information?
We send parcels of all shapes and sizes so we use several different couriers and haulage companies. Some of these make tracking information available online, and where this is the case you will receive notification by email or text. If you need to track your parcel urgently then please contact us.
What happens if my order doesn't arrive?
If you do not receive your goods within 5 working days for UK orders, or 2 weeks for international orders, please contact us for tracking information.
If your goods do not arrive within 30 days of your order being accepted, please contact us within 40 days and you can opt for a full refund or for us to make good the non-delivery.
Items that are lost will be replaced or refunded by us.
What happens if my order arrives damaged?
Please contact us within 5 working days of receiving your order. You may need to obtain a Returns Number, and return the goods to us; parcels without a Returns Number may be refused. By prior agreement, we will refund the costs of return shipping by Royal Mail first class recorded delivery, or will arrange a collection for items over 2kg. Once we have received the damaged goods we will despatch a replacement or refund you in full.
How will my order be sent?
We will always use a reputable courier company. Smaller items are usually shipped using Royal Mail or Interlink, and larger items are sent usingTNT or Tuffnells. Palletised deliveries are with Hacklings.
A signature will always be required, so please ensure that someone is available to sign for your parcel. Please also ensure you either check the item for damages before signing, or sign for the goods as unchecked. If you need to arrange delivery for a specific time please contact us. There is usually an additional charge for timed delivery.
What countries do you ship to?
We can deliver to anywhere in the world, but you may need to contact us for a quote. You can purchase online if your order is being delivered to Austria, Belgium, Denmark, France, Germany, Ireland, Luxembourg and the Netherlands. Outside these countries you will need to place your order by phone or email.
If you are outside of the EU you may be liable for import taxes.
Important Information About Backorders
At Wildcare there are times when items are only available on a backorder basis, either due to high demand or if the item is a special order item. We refer to these as ‘backorder items.
Backorder items are clearly listed on our website as ‘Order To Reserve Stock (Backorder)’. Items that are in stock and ready to be shipped immediately are listed as ‘In Stock’.
When you place an order for a back order item or an order that includes back order items, a member of our team will be in contact within 48 hours of your order to confirm the lead time for delivery. For any queries before then, please call us on: 01451 833 181
Avoiding Disappointment
We cannot guarantee that a backordered item will come back into stock or be delivered for a specific date, however we will always do our best to keep you informed and updated.
If your back order is urgent or required within a specific time frame we suggest to call us on 01451 833 181 so we can keep your requirements in mind throughout the waiting period.
Returns
If you receive damaged items or the wrong goods, please let us know straight away so that we can arrange for them to be returned to us and replaced as quickly as possible.
You will need to obtain a Returns Number - please call us on 01451 833 181 or email support@wildcare.co.uk
Please return goods, WITH THE RETURNS NUMBER MARKED ON THE PARCEL to: Wildcare, Eastgate House, Moreton Road, Longborough, GL56 0QJ
We may ask for a photograph any damaged items before we agree to replace them.
