This instrument is designed and manufactured in accordance with the requirements specified in the People's Republic of China standard GB/T 508 "Determination of Ash Content in Petroleum Products", and is suitable for determining the ash content of petroleum products according to the method specified in GB/T508. However, this instrument is not suitable for the determination of ash content in petroleum products containing raw ash additives (including certain phosphorus containing compounds), lubricating oils containing lead, and used engine crankcase oils.

1、 Main technical features
1. This instrument consists of three parts: a high-temperature heating furnace, a temperature control console, and an electric heating furnace. The instrument has a small volume and occupies less space.
2. The heating furnace adopts an integral structure, special refractory materials, and heating devices, with short heating time, long service life, and beautiful overall design.
3. The temperature control console adopts an adjustable digital display controller, which has small temperature overshoot and stable and accurate temperature control,
4. The size of the heating plate of the electric furnace is Φ 85mm, and the box shell steel plate is stamped, which is small, beautiful, and durable.

2、 Main technical parameters and indicators
（1） High temperature heating furnace
1. Rated power: 2500W；
2. Rated voltage: AC (220 ± 10%) V, 50Hz;
3. Temperature control: (775±25)℃；
4. Empty furnace heating time: ≤ 50 min；
5. Furnace temperature uniformity: ≤ 15℃；
6. Furnace dimensions: 200mm x 120mm x 80mm (length x width x height);
7. Dimensions: 490mm x 450mm x 450mm (length x width x height);
8. Weight: Approximately 35kg.
（2） Temperature control console
1. Rated controllable power: 5000W；
2. Working voltage: AC (220 ± 10%) V, 50Hz;
3. Maximum control temperature: 1200℃；
4. Supporting temperature controller: digital temperature controller;
5. Dimensions: 320mm x 315mm x 245mm (length x width x height);
6. Weight: Approximately 5kg.
（3） Electric stove
1. Rated power: 1500W；
2. Rated voltage: AC (220 ± 10%) V, 50Hz;
3. Rated temperature: 400℃；
4. Power regulation: continuously adjustable from 1 to 6 levels;
5. Environmental temperature: 5℃～40℃；
6. Relative humidity: not exceeding 80%;
7. Heating plate size: Φ85㎜；
8. Dimensions: 280mm x 250mm x 90mm (length x width x height).