  Ground-based whole sky imagers are popular for monitoring cloud formations,
which is necessary for various applications. We present two new Wide Angle
High-Resolution Sky Imaging System (WAHRSIS) models, which were designed
especially to withstand the hot and humid climate of Singapore. The first uses
a fully sealed casing, whose interior temperature is regulated using a Peltier
cooler. The second features a double roof design with ventilation grids on the
sides, allowing the outside air to flow through the device. Measurements of
temperature inside these two devices show their ability to operate in Singapore
weather conditions. Unlike our original WAHRSIS model, neither uses a
mechanical sun blocker to prevent the direct sunlight from reaching the camera;
instead they rely on high-dynamic-range imaging (HDRI) techniques to reduce the
glare from the sun.
