Install a hinge on the side of the insulation box, swing it open then swing closed a different section that includes the thermocouples? Or just slide the insul

Install a hinge on the side of the insulation box, swing it open then swing closed a different section that includes the thermocouples? Or just slide the insulation down in front of the thermocouples when they aren't needed. I have to assume these things mostly work on radiant heat at those temperatures.