Brass oil sight glass,Bulls eye sight glass or Knob Type Sight Glass,Oil Sight Glass is a glass mask with copper body that installs in the drain port of the oil reservoir of pumps, gearboxes, bearing housings, air compressor, reduction box and other lubrication-critical pieces of equipment. It shows continuous fluid observing of clarity, color, sediment, and water contamination. These products enable personnel in many industries to constantly manage the condition of the oil.
work termperature: -20 to +180 DC.
Material:copper,stainless steel, aluminium alloy