Testo 860i Wireless Thermal Imaging Camera (0563 0860) The Testo 860i Wireless Thermal Imaging Camera is a tool for professionals needing high-precision thermal imaging for HVAC systems, building diagnostics and industrial maintenance. This smartphone-compatible thermal camera allows wireless operation via the Testo Smart App, giving seamless image analysis, reporting and documentation. It measures -20°C to +350°C with accuracy of ±3°C or ±3% of m.v., using a 256 x 192 pixel infrared resolution for clear thermal images. DeltaHeat and DeltaCool application-specific functions quickly identify Delta T variations for precise temperature measurement, and a rechargeable lithium battery gives up to 2 hours of operating time. It can be attached directly to a smartphone for one-handed operation or used wirelessly for maximum flexibility. Key Fea