Offering through-the-lens and laser sighting methods, Marathon MM covers temperature range of -40 to +3,000°C and provides video surveillance and documentation capabilities. Housed in sealed NEMA 4 enclosure, thermometer has electro-optical design, digital electronics, and push-button operator interface. Optical resolution up to 300:1 enables targets with spot size as small as 0.6 mm to be measured from distance of 150 mm with response time of 2 ms.