The Bat Conservation Trust is running an introductory bat detector workshop in Pontyberem on 6th August.
From the page: “This introductory bat detector workshop involves an evening classroom session followed by a practical field session starting around dusk. Bat sounds are broken down into four elements in order to train people’s sonic memory and aid species identification using a heterodyne bat detector in the field. The focus is on pipistrelles, noctule, serotine and Daubenton’s bat as these illustrate a range of different bat sounds. The workshop will be led by Steve Lucas.”
See here for full venue and cost info: https://bats.eventhq.co.uk/introductory-bat-detector-workshop-carmarthenshire-august-2015