What line do you choose for black and white photography?

CWG-32-600H intrinsically safe infrared thermometer of Fushun Branch of General Institute of Coal Science can measure the surface temperature of objects and is explosion-proof. Can be used in gas stations, mines and other places. I often use it in our company, and I feel quite accurate. As for the information, you can contact the manufacturer and ask them to send it to your mailbox. They should be very happy.