Quatrosense Environmental Ltd. (QEL) 5935 Ottawa Street, Box 749 , Richmond , Ontario K0A 2Z0 Canada About Solutions products services Downloads Companies Quatrosense Environmental Ltd. (QEL) Services Customer Support Customer Support 0 Share Clients and contractors can call QEL Customer Support from 8:30 am – 5 pm EST. Our factory-trained technicians will provide immediate assistance on how to install and operate all QEL equipment. Most popular related searches Customer reviews No reviews were found for Customer Support. Be the first to review! Add your review Publish your review Great! review successfully added!