LED-TP-GA Glass Tube Thermometer Stright Form For installations where space is a factor, the glass tube industrial thermometer is recommended. This instrument is compactly designed, ruggedly constructed and of excellent readability. It meets most specifications for the general construction industry. The low cost and quality design makes it ideal for a variety of commercial application. SPECIFICATIONS Scale length: 4 1/2", 6", 6 1/2", 8" Case: Plastic/oxidized aluminum alloy /plated brass. Lens: Glass. Connection: Brass, 1/2"NPT/BSP straight form. or as customer's request Tube: Glass tube/magnifying glass tube, red or blue liquid. Options: Special ranges, connections, lenses and stem lengths. Upper Length:110,150,200mm Lower part:Brass(temperature ≤300 Celsius ) or Stainless steel or Cargon steel A3(temperature>300 Celsius)