国产高清在线观看-www.jizzjizz-久久久久久免费视频-夜夜草视频-久久久国产一区二区三区-亚洲在线看-在线观看黄色网-亚洲视频欧美-大片免费在线观看视频-伊人激情综合-亚洲大尺度视频-人体裸体bbbbb欣赏-欧美a网-韩国一区二区三区在线观看-婷婷伊人五月天-中文字幕乱轮-欧美日韩亚洲激情-亚洲激情免费视频-亚洲欧美色视频-国产ts一区-日本美女久久久-999国产精品999久久久久久-免费av的网站-韩国成人三级-刘亦菲国产毛片bd

Product Description:

The SD-12 water bath nitrogen blowing instrument is a high-precision control instrument that combines microcomputer control technology and PID control. Its working principle is to blow nitrogen quickly, continuously and controllably to the surface of the heated sample, according to the concentration of the solvent. Evaporation speed and boiling point, set heating temperature, realize rapid oxygen-free concentration of a large number of samples. The water bath nitrogen blowing instrument includes a base and a support device, a sample holder and a gas distribution system. The test tube is fixed in position by a test tube clamp with a spring and a support plate. Each sample position has a digital number; the gas reaches the gas distribution system through the flow meter, and the flexible guide tube guides the gas into the valve and stainless steel needle at each position, blowing the gas to the sample surface, so that the solvent volatilizes quickly. According to the size of the test tube and the amount of solvent, each air duct can be independently raised and lowered to a suitable height.

Features:

◆Real-time temperature display, time countdown display;

◆Adopt water bath constant temperature, good and even heat transfer, which is conducive to rapid heating and temperature control.

◆Number of samples: 12 digits, spring-loaded test tube clamps are fixed and positioned, and each sample digit has a digital code.

◆Strong compatibility, suitable for test tubes (10~29mm in diameter), conical flasks, centrifuge tubes, with a sample capacity of 1-50ml.

◆High temperature control precision, wide temperature control range, temperature numerical control digital display, easy calibration.

◆Round structure, 360 degree rotation freely, convenient for sample holder to enter and exit the water bath, easy to use and operate.

◆Built-in liquid level sensor to prevent dry burning and buzzer alarm.

◆The needle valve tube with free lifting, adjustable needle valve can control the gas flow of each sample gas needle.

◆All parts are resistant to corrosion and organic solvents, durable and easy to clean.

Product parameters: