Kestrel
Kestrel Meters are manufactured by NK (Nielsen-Kellerman)—An American company known for speciality products NK® Rowing & Paddling, Kestrel® Pocket Weather Meters, and Blue Ocean® Audio products. The Nielsen-Kellerman Company designs, manufactures and distributes waterproof instruments for active lifestyles and many technical applications. All products are made in Boothwyn, PA, USA.