Testo 0560 1805 805i smartprobe bluetooth infra red thermometer testo 0560 1805 p the testo 805i infra red thermometer in conjunction with a smartphone or tablet functions as a compact ir thermometer for wall temperatures as well as surface and component temperatures in many measurement applications the measuring point is marked clearly with a laser circle made up of eight dots so you always know precisely where the measurement point is p p you can read off your measurement values co