I.Introduction

 GD-2801G Penetrometer  is designed and made as per the requirements about penetrometer and its accessories stipulated in the National Standard GB/T 4985 “Test Methods for Needle Penetration of Wax”.

1. The needle penetration of wax is expressed as the depth that a standard needle of 100 g vertically penetrates into a wax sample without any measurable friction in 5 s at 25 °C.

2. The test temperature for wax penetration is 25 °C in general.

3. Each wax penetration is 0.1 mm. It is directly shown on display.

II . Technical parameters:

1. Timing selection: 5, 8, 10, 12, 30 or 60 s;

2. Timing error: less than ±0.1 s;

3. Penetration accuracy: ±0.1 penetration;

4. Maximum penetration: 600 penetrations;

5. Standard needle: 2.5±0.05 g;

6. Constant temperature bath: made of harden glass;

7. Mold: 25×32×3mm, a brass cylinder;

8. Brass board: 65×40×6.5mm;

9. Heating power: 220 W.