They are normally used for general purpose, and they are sorted in two types as mercury and organic liquid. Mercury-in-glass thermometers' measuring range is between -50 to 600 degree C, and organic liquid-in-glass thermometers' range is between -100 to 200 degree C coding with red or blue color. The length could be varied according to customers' requirements. Place of Origin: China Features: 1)V-shaped case (outside-scale). Straight form or 90 degree angle form. 2)Thermometer fluid: Mercury, blue or red organic liquid. 3)Themperature range: -60 to 600 Celsius or Fahrenheit. 4)Upper part: Aluminum die easting gold anodised. 5)Upper Length: 110, 150, 200mm 6)Lower part: Brass(temperature less 300 Celsius ) or Stainless steel or Cargon steel A3(temperature>300 Celsius) 7)The lower part: 30 to 500mm 8)Thread: 1/2" BSP, NPT, BSP or M20X1.5 etc, or as customer's request .