Rodent hair and urine will fluoresce under long wave ultra violet light. Rodent hair will fluoresce ‘blue-white’ and hence can easily be seen on sacking material or when it becomes mixed with say wheat grains. On the other hand rodent urine will fluoresce blue-white to yellow-white when dry.
When fresh it is more predominantly blue. Since rodents usually urinate while in motion, they make a characteristic droplet pattern which is distinguishable from other fluorescent material.
Long wave UV inspection lamps are also widely used to detect the possible Aflatoxin contamination in agricultural commodities. At UVMAN we offer a choice of long wave [365nm or UV-A] UV inspection lamps from the Spectroline range for any number of applications.