Uncooled infrared focal plane arrays are being developed for a wide range of thermal imaging applications. ULIS now offers a new type of detector for middle and long wave applications. This detector has been designed from the standard product using the same focal plane array and the same package, only the window is different in terms of spectral transmission. This device is well adapted to high temperature measurements, special industrial processes and gas detection. After some brief microbolometer technological background, we will present the interest for such detectors by comparing LWIR/MWIR detector signal to noise ratio, we will then determine the advantages for different applications. Finally, we will describe and give the main EO characteristics and performances of this Ulis product.