I. Purpose 
      This instrument is designed and manufactured in accordance with the technical requirements for penetration and its accessory properties specified in the national standard GB/T4985 "Petroleum Wax Penetration Test Method".
1. Under the condition of a standard needle with a load of 100 grams at 25°C, the depth of vertical penetration into the paraffin sample within 5 seconds without significant friction is referred to as the paraffin penetration, used to determine the hardness of paraffin.
2. The test temperature for paraffin penetration is generally 25°C.
3. Paraffin penetration is measured in units of 0.1 mm and can be directly read on the display.

II. Technical Parameters
　1. Time control device: Selectable 5, 8, 10, 12, 30, and 60 seconds.
   2. Time control error: Less than ±0.1 second.
   3. Penetration accuracy: ±0.1 penetration unit.
   4. Maximum penetration: 600 penetration units.
   5. Standard needle: 2.5±0.05g.
   6. Constant temperature bath: Made of hard glass cylinder.
   7. Molding device: 25X32X3mm, brass cylinder. 
   8. Brass plate: 65X40X6.5mm.  
   9. Heater power: 220W. 
   
III. Instrument Set
Main instrument unit
Power cord (250V 6A)
Standard needle
Weight (50g)
Needle connecting rod
Sample container
Thermometer 0~50°C  0.1 division
Glass water bath
Brass plate
Round glass
Fuse 1A (Ф5×20)