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MX Series Infrared Thermometer - Noncontact Temperature Measurement, features temperature range: -30° to 900°C （-25° to 1600°F）, accuracy: （assumes ambient operating temperature of 23ºC （73ºF）） ±0.75% of reading or ±1ºC （±2ºF） whichever is greater. Response Time: 250 m Sec （95% of reading）; Spectral Response: 8 to 14µm, thermopile detector; Distance to Spot （D:S）: 60:1 （50:1 with Close Focus Option）. Minimum Measurement Diameter: 19mm （.76"） （6mm （0.24"） with Close Focus Option）. Display Resolution: 0.1ºC of reading up to 900ºC （0.2ºF up to 999.8ºF）. Temperature Display: ºC or ºF selectable. Ambient Operating Temperature: 0 to 50ºC （32 to 120ºF ）. Repeatability: less than ±0.5 of reading or less than ±1ºC （±2ºF）, whichever is greater. Storage Temperature: -20 to 50ºC （-25º to 122ºF）. Broad temperature range, superior optics and the True Spot™ double-bright circular laser sighting system make the MX series the most advanced portable thermometer in the industry. The MX series featuring the True Spot™ coaxial laser sighting is the only thermometer designed with precise infrared beam tracking, resulting in more accurate measurement. True Spot™ is a coaxial circular laser sighting system that profiles the infrared beam at all distances, allowing the laser circle to consistently show the measurement area. This advanced coaxial system uses an extra bright 635nm, 16 point laser circle to clearly highlight the targeted area. The Close Focus （CF） option lets you accuray measure very small areas at the Focus Point where the IR beam narrows. Paired with the advanced coaxial laser sighting, extremely small objects 6 mm （.24 in） can be easily measured.