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Large merchant ships, exploration vessels, and warships often store, transport, and use a variety of fuel and engine oils, especially when these vessels provide supplies for aircraft or other surface ships. Although the potential quality and pollution problems at sea may not be greater than on land, safety and economic issues are much more serious.

Once a main engine on a ship fails, it will have catastrophic consequences. Another deadly threat comes from the failure of the aircraft engine on the deck. Through testing, it can be found that the cause of these two faults is mainly due to the contamination of the fuel they use. There are two main reasons for fuel pollution:

The first reason is the incompatible pollution of the engine fuel. For example, if diesel is contaminated with gasoline, it will reduce the lightning temperature of the fuel, causing destructive pre-ignition or engine explosion. If the turbine fuel is contaminated, it will significantly change the shape of the flame inside the turbine ignition band, which can cause damage to the turbine blades and engine stall.

The second reason is the contamination of engine oil. Wear occurs during normal engine use, and it is inevitable that a small amount of fuel will leak and cause oil contamination in the engine. This contamination reduces the ability of the lubricant to protect the bearings and other moving parts, resulting in increased wear. Contaminated fuel in the lubricating oil will greatly reduce its flash point temperature.

Both of these contaminations can be detected by flash point testing.

There are many flash point test methods to choose from, and the most common method requires 50-75ml samples. During sample processing, the technician needs to pour the measured flammable liquid into the sample cup with the lid. This cover needs to be opened continuously or intermittently throughout the test. If the sample overflows or splashes, it is easy to ignite the tester or other sources of ignition and cause a fire. At sea, the hull's unpredictable oscillations due to waves greatly increase this risk. Therefore, the traditional flash point test method is not suitable for use in offshore laboratories and requires a better test method.

Grabner produced MINIFLASH provides the highest level of security for marine flash point testing. The flammable liquid sample is completely enclosed throughout the test and thus greatly reduces the risk of leakage and spillage. This closed cup test is especially meaningful in mobile environments such as hulls. In addition, MINIFLASH requires only 1 ml of test sample, which further reduces potential hazards associated with fire during sample handling and testing.

In addition, the operation and maintenance of MINIFLASH is very simple, just a short training for the user. In short, the perfect combination of safety and ease of use makes MINIFLASH popular with national naval defense organizations and companies represented by the US Navy.

Example: Determination of diesel content leaking into engine oil

Prepare samples of different dilutions (mass percentage or volume percentage) and determine the flash point. The test conditions are as follows:

  Dilution curve

For more information, please call the person and the instrument consultation hotline: 400-820-0117

Dome Fixed Focus Camera

We may have heard of the Dome Fixed Focus Camera/ Fixed Focus Dome Camera/ Fixed Focus Dome cameras/ Fixed Focus Digital Dome Camera/ Fixed Focus Dome Camera Amazon/ Fixed Focus Dome Camera CCTV, so what is the Dome Fixed Focus Camera? We know that the dome refers to the camera shape, so what about the Fixed Focus? Actually, the Fixed Focus refers to a type of the camera lens. Today let me introduce the camera lens for you.

Last time, I have introduced the camera lens and one classification for you. Today please let me introduce the 2nd classification for you---the classification according to the occasions.

1. The standard lens
The lens with the angle of view at about 50°(which is also the angle that a person can see without turning his head and eyes), is called the standard lens. The focal length of the 5mm camera's standard lens is mostly 40mm, 50mm or 55mm. The focal length of the 120 camera's standard lens is mostly 80mm or 75mm. The larger the CCD chip is, the longer the focal length of the standard lens will be.

2. The wide-angle lens
The wide-angle lens has the angle of view at above 90 degrees, which is suitable for shooting close and large-scale scenery, and can deliberately exaggerate the foreground to show a sense of perspective. The typical wide-angle lens of the 35mm camera has a focal length at 28mm and an angle of view at 72°. The 50mm, 40mm lens of the 120 camera is equivalent to the 35mm, 28mm lens of the 35mm camera.

3. The long focal length lens
The long focal length lens is suitable for shooting distant subjects. The small depth of field can easily make the background blurred and the subject stand out, but it is bulky and the difficult to focus on the dynamic subjects. The long focal length lenses of the 35mm camera are usually divided into three levels, 135mm or less is called the medium focal length, 135-500mm is called the long focal length, and above 500mm is called the super long focal length. The 150mm lens of the 120 camera is equivalent to the 105mm lens of the 35mm camera. The long focal length lens has the telephoto lens design because it is too bulky, that is, a negative lens is added to the lens behind , and the main plane of the lens is moved forward, then a shorter lens body can be used to obtain the long focal length effect.

4. The reflective telescope lens
The reflective telescope lens is another design of the super telescope lens, which uses a reflecting mirror to form an image. However, due to the design, the aperture can't be installed, and the exposure can be adjusted only through the shutter.

5. The Macro lens
The Macro lens can not only do the close-up macro photography, but also do the telephoto.

Dome Fixed Focus Camera

In conclusion, we can choose rake the angle of the view into consideration according to our needs, when we choose a Dome Fixed Focus Camera.


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