Skip to product information
1 of 1


Hydromoth with Underwater Case

Hydromoth with Underwater Case


Regular price $149.00 USD
Regular price Sale price $149.00 USD
Sale Sold out

Limit 5 per customer, no bank/wire transfers


HydroMoth is the latest product from the AudioMoth range and offers everything needed to start recording underwater sound for extended periods of time at depths of 30-60m. HydroMoth hardware is directly compatible with all AudioMoth firmware, meaning you can use the device in any number of underwater applications, from scheduled recording in coral reefs, to triggering recordings by amplitude or frequency in freshwater ponds. HydroMoth has improved LED visibility and more accurate time keeping for long deployments. It also has an in-built magnetic reed switch, which enables recordings to be started and stopped in wet conditions without opening the case. HydroMoth is sold with the AudioMoth Underwater Case as standard, with the option to add a waterproof magnetic key chain fob to make use of the magnetic reed switch.



EFM32 Gecko processor
Capable of recording uncompressed audio to micro SD from 8k to 384k samples/second
Records uncompressed WAV files to SD card
Powered by 3 x AA batteries
Analog MEMS microphone acts as contact hydrophone
Analog pre-amplifier with adjustable gain
Configurable USB interface
Onboard real-time clock keeps track of time in UTC
Improved 32.768 kHz MEMS oscillator to reduce clock drift
Tested to a depth of 30m for 2 months


Hydromoth Underwater Case (Clear)

The AudioMoth Underwater Case is designed specifically for the HydroMoth and AudioMoth version 1.2.0 (without the 3.5mm socket). Other versions of AudioMoth will fit inside the case, but we recommend version 1.2.0 to minimize self-noise in recordings. The case is made from injection-molded polycarbonate and comes with an adjustable velcro strap, which makes securing AudioMoth simple and easy. Unlike the original AudioMoth case, this does not have the acoustic membrane. The case is compact and highly resilient and will house AudioMoth for extended periods of time at depths of 30-60m.

View full details