In its "Ultimate Contractor Collection Giveaway," Testo Inc. will give a group of products valued at more than $6,000 to one winner. To qualify, process engineers and technicians in North America must complete an online survey on the Sparta, N.J.-based toolmaker's website about their diagnostic tool buying and using experiences.

The prizes awarded to one winner include Testo’s Model 875i-1 thermal imager, Model 320 combustion analyzer, Model 570 digital refrigeration system analyzer and Model 435 HVAC performance test kit.

To enter and for complete contest rules, visit www.testousa.com/thermal. Survey and giveaway entries will close on May 31, 2013.