23 Jul Graseby Infrared 997-0060 IR Detector, LN2 Cooled Sensor
Graseby Infrared 997-0060 IR Detector. For sale- a Graseby Infrared 997-0060 IR Detector as pictured. In very good physical condition but I have no way to test it. It would appear to need liquid nitrogen poured into the hole on top in order to operate....