THC in urine test detection: Information about kits and services to detect THC in Urine. Test options range from single to 13 panel kits. Saliva testing is an alternative to THC urine test kits and are available in our One-Stop-Shop. Instead of using instant drug testing kits, you can perform a THC in urine test onsite or offsite. Testing location is the customer’s choice. We can either come to your location or you can choose any collection site in our vast network.