Chauvin Arnoux CA 1864 [P01651813] Infrared Thermometer,  – 50 °C to + 1,000 °C. The Chauvin Arnoux CA 1864 infrared thermometer measured temperature range up to 1000 °C. The pistol-shaped casing makes them very comfortable to handle. All the functions are accessible one-handed. With the easy-to-use laser sight, users can point at the centre of any target with no risk of error.