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The SM4BAT FS is a compact, lightweight, single channel, full spectrum ultrasonic bat bioacoustics recorder.
Designed around the size of four D-sized batteries, the SM4 family of recorders includes the smallest and lightest, weatherproof recorders available. Molded in polycarbonate, the SM4BAT FS is less than half the weight and size of the older SM3. This custom-designed enclosure allows for multiple units to be packed into a backpack. In addition to being completely weatherproof, the enclosure has an integrated and lockable security cover.
Why a single channel for bats? Wildlife Acoustics found that many bat researchers use single channel recording for their work (e.g SM3BAT, SM2BAT/SM2BAT+ and SMZC). If you need two channels for bats, We advise you to buy two of the SM4BAT recorders. Why? The cost of two SM4BATs is not much more than the cost of an SM3BAT with an extra microphone. With two SM4BAT recorders deployed, you get more placement flexibility. Of course, you can also opt for the Song Meter Mini Bat.
How long can you deploy an SM4BAT? Featuring a new, low-power microprocessor, single-channel recording format and running on 4 D-cell batteries, the SM4BAT FS has a recording run time of 275 to 400 hours in full-spectrum depending on bat activity - assuming a 256kHz sample rate, using SanDisk Ultra flash cards and Energizer EN95 alkaline batteries and operating with an internal temperature of 20C.
Note that more than half of the power consumption of the SM4BAT system can be tied to the flash cards. Run times can vary by as much as 50% depending on the characteristics of specific brands and models of cards. We recommend using SanDisk SDHC/SDXC cards and you can buy them from our store. Other factors like the kind and quality of batteries used, how rechargeable batteries are recharged, temperature, configuration and bat activity can affect run times.
The SM4BAT FS intelligent recording triggers and noise file scrubber help maximize the number of bat echolocations recorded and minimize recordings that do not contain bat echolocations. The SMM-U2 along with the SM4BAT FS and its advanced trigger technology produces the cleanest and quietest bat recordings available.
To get you started quickly, the SM4BAT FS features easy-to-use Quick Start schedules, such as sunset to sunrise. You can also customize your schedules for specific recording needs. The free SM4 Configurator software can be used to configure settings and schedules from a computer. The SM4 Configurator software also provides a Security Lock option to prevent accidental changes to deployment and recording settings.
SM4BAT FS: 16-bit PCM .wav files or compressed .w4v files
|Sample rates||Full-Spectrum, single-channel;|
192kHz, 256kHz, 384kHz, 500kHz
|Run-time||Up to 480 hours (e.g. 48 10-hour nights), depending on bat activity|
|Power options||Internal power using 4 D-size alkaline or rechargeable NiHM batteries|
External power via optional SM3/SM4 Power Cable
|Dimensions||218mm x 152mm x 78mm|
Without batteries: 730g
With 4 D batteries: 1300g
|Enclosure Environmental Protection|
-20°C to 85°C
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