LONGER LK1 90% Pre-Assembled 3D Printer with Large Build Size 300x300x400mm, Full Touch Screen, Filament Detector, Resume Printing, Full Metal Frame (Red)

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LONGER LK1 90% Pre-Assembled 3D Printer with Large Build Size 300x300x400mm, Full Touch Screen, Filament Detector, Resume Printing, Full Metal Frame (Red)

  • 【EXTRA LARGE BUILD PLATFROM】This 3d printer comes with one of the largest build spaces available. At 300*300*400mm, you can print models that 90% of other printers could not. The unique High-precision nozzle of 0.4mm hot-end with straight-through design reduces the weight on the X-axis which delivers better performance even on very tall prints.
  • 【RECOVER PRINTING FUNCTION】Not like traditional printer, LK1 has the ability to resume printing even after a power outage or lapse occurs; And built-in filament sensor, when the filament runs out, it will stop printing, and will continue once there are filament. So you do not need to print from the beginning again, which can help you save a lot of material and time.
  • 【EASY TO ASSEMBLE AND USE】Full metal body, stable and durable; and only 15 minutes to assemble. Easy to operate, 2.8-inch touch screen with brand new friendly UI to preview model and printing process on screen, offline printing.
  • 【PRINTING EFFICIENT AND SAFE】360w power and 24V safe voltage, heating faster; 3D printer comes with a tempered glass plate on the heated bed, greatly resolving warped bed issues. And build in power management and thermal cooling system, keep the printing safer.
  • 【100% QUALITY GUARANTEED】Our experienced 3D printing engineers are available 24/7 to offer you lifetime technical support. If you are not satisfied with the results of your prints, contact us and we will work with you to provide assistance until you are printing like a pro!

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Metal Detector Information And Buying Guide

A metal detector is an electronic instrument which is used for finding metallic items in hidden places such as under under sand.


How does a detector find metallic items?

The metal detectors are equipped with magnetic coils which are meant to interact with the metals that are near. Therefore, the moment you place the detector at the ground, an attraction among the coils in the detector and the metals to be had happens therefore notifying you the spot to look at. One of the crucial metals detected by way of the instrument come with iron, copper, brass, aluminum, tin, lead, gold, silver, bronze, jewels, coins and many others. A metal detector is a reliable gadget for finding buried metals considering that it help you discover several types of metals.
One very important thing to remember although is that there are huge forms of metal detector devices in the marketplace to make a choice from. So, what will have to you search for while on the lookout for a new detector?

The level of sensitivity

The sensitivity levels within the detectors resolve the type of metal it’ll have the ability to find in that space. Some metals require extremely sensitive units, and there are those who get attracted pretty simply. For example, small metals just like the jewels or even coins need a detector that has a high stage of sensitivity because it is easy to seek out them especially if they’re buried underground. However, for massive pieces that are hidden underground, using a low delicate detector will work appropriately for you for the reason that gadgets are simple to find. Additionally, it is recommended that you buy a sensor that has versatile, delicate choices given that you can also wish to use it in numerous prerequisites and even spaces.


This is one of the highest options that you must look out for when shopping for the new detector. This is because it makes your detecting activity simple when discovering natural metals. A discrimination feature is utilized in finding the suitable metals via determining the responses from the metals on the area that you are searching. Each metal has its response while attracted via a magnetic tool and subsequently, this selection allows you to know the type of metal located in that area via exhibiting the response on the system. Notice that the price of a detector with this selection is rather top. Additionally, while shopping for a detector with discrimination, check out the levels available for the reason that they vary in levels.

The cost

How so much are you prepared to spend on obtaining a new detector? Well, this must be the primary query you ask yourself before you head to the shop to buy one. The metal detectors are equipped with totally different options, and the elements determine the price. Due to this fact, if you want a sensor that has all of the above features, then it’s important to be ready to spend a couple of more bucks considering it’ll cost you extra as opposed to acquiring simple detector.

The user

You may want a metal detector that can be used via the entire family particularly while you go out looking, tenting or even mountain climbing. Subsequently, to make sure that everybody will be capable to use the detector conveniently imagine buying an adjustable indicator that you’ll increase in duration for better use.

The area to use it

A few metal detectors are designed for use in locations that wouldn’t have high concentrated soils or areas that don’t seem to be deep, at the same time as others are made with an adjustable mechanism which allows you to use it in different places. Due to this fact, if you already know that you’re going to be using the instrument in different areas, imagine getting the adjustable one for easy use. Word that an adjustable metal detector will price you more versus the simple one.

Different accessories

Each metal detector has to have an feature that notifies you whilst you get close to the metals at the floor. Some steel detectors are bought with headphones, and others are supplied with LED notifications on the LCD screens for a similar function.

The features to check for



Radar is the function that is answerable for figuring out the sizes and the densities of the metals to be had on the floor. This feature is mainly advisable for other folks engaged to find treasures or gold at the deep levels of the land.

The detection tech

The metal detectors are designed with totally different detecting era, and therefore, you want to determine what you’re going to be searching with the tool before buying it. The ways are grouped into 3 categories that are the BFO, VLF, and PI.

BGO is the simplest era and detectors with this technology include approximately two coils of the magnet. It is a perfect for in search of metals that are on the topsoil or hidden on other objects.

VLF – This type is perfect for many who want to pick positive metals from the ground. It really works by way of liberating frequency magnetic at the floor. Then whilst the magnet reaches to the ground, it moves till it comes across a selected steel, and then reflects the instrument. You cans setup the VLF to reflect most effective whilst it comes into touch with the kind of metallic objects you might be hunting for.

PI is a high-quality era which is liable for discovering the metals which might be deep within the ground. The generation will also be set in some way that it’ll only pinpoint and provide you with a warning when it comes into contact with that metal. It is mainly used by individuals who hunt for treasures or gold deep underground.