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) 3D Printers

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 Buying Guide

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


How does a detector discover metal items?

The metal detectors are supplied with magnetic coils which are supposed to interact with the metals around. Subsequently, the moment you put the device at the ground, an attraction among the coils in the detector and the metals available happens therefore notifying you the location to take a look at. One of the metals detected via the device come with iron, copper, brass, aluminum, tin, lead, gold, silver, bronze, jewels, cash and plenty of others. A metal detector is a competent tool for locating buried metals bearing in mind that it can help you find different types of metals.
One essential thing to remember although is that there are wide forms of metal detector gadgets in the marketplace to make a choice from. So, what should you search for while in search of a new detector?

The extent of sensitivity

The sensitivity levels within the detectors decide the kind of metal it will be capable of find in that area. A few metals require highly sensitive devices, and there are those who get attracted pretty simply. As an example, small metals like the jewels and even coins desire a detector that has a top level of sensitivity due to the fact that it’s easy to seek out them particularly if they are buried underground. On the other hand, for massive items that are hidden underground, the use of a low sensitive detector will paintings appropriately for you for the reason that gadgets are simple to find. Additionally, it’s endorsed that you just purchase a sensor that has versatile, sensitive options on account that you can also need to use it in different stipulations and even spaces.


This is without doubt one of the perfect options that you simply will have to look out for whilst shopping for the metal detector. It is because it makes your work straightforward whilst finding natural metals. A discrimination feature is used in finding the right metals through picking the responses from the metals at the space that you’re looking out. Each and every metal has its reaction whilst attracted via a magnetic device and due to this fact, this option allows you to realize the type of metal positioned in that house through showing the response on the system. Notice that the price of a detector with this selection is somewhat top. Additionally, while shopping for a detector with discrimination, check out the levels to be had due to the fact that they vary in degrees.

The price

How so much are you prepared to spend on acquiring a new detector? Well, this will have to be the primary query you ask yourself sooner than you head to the shop to shop for one. The metal detectors are provided with completely different options, and the weather decide the cost. Due to this fact, if you want a sensor that has the entire above options, then you need to be ready to spend a couple of more greenbacks seeing that it is going to price you more versus acquiring simple detector.

The consumer

You may want a metal detector that can be utilized by all of the family particularly while you go out searching, tenting or even hiking. Due to this fact, to make certain that everyone will have the ability to use the detector easily believe shopping for an adjustable indicator that you can increase in length for better use.

The area to use it

A few metal detectors are designed to be used in areas that wouldn’t have high focused soils or areas that aren’t deep, at the same time as others are made with an adjustable mechanism which lets you use it in different locations. Due to this fact, if you know that you’re going to be the usage of the device in numerous areas, imagine getting the adjustable one for simple use. Word that an adjustable metal detector will value you more as opposed to the straightforward one.

Other accessories

Each and every metal detector has to have an accessory that notifies you when you get as regards to the metals at the ground. Some metal detectors are sold with headphones, and others are equipped with LED notifications at the LCD monitors for the same goal.

The options to check for



Radar is the feature that is responsible for determining the sizes and the densities of the metals available at the flooring. This selection is principally really useful for other folks engaged in finding treasures or gold on the deep ranges of the land.

The detection tech

The metal detectors are designed with totally different detecting technology, and subsequently, you are looking to decide what you’re going to be looking out with the device prior to shopping for it. The techniques are grouped into 3 classes which are the BFO, VLF, and PI.

BGO is the most simple generation and detectors with this generation include approximately coils of the magnet. It is a perfect for in search of metals which might be on the topsoil or hidden on different objects.

VLF – This device is ideal for individuals who need to pick out sure metals from the ground. It really works by way of freeing frequency magnetic on the floor. Then whilst the magnet reaches to the ground, it actions till it comes across a particular metal, and then reflects the instrument. You cans setup the VLF to reflect handiest while it comes into contact with the kind of metallic objects you might be hunting for.

PI is a high-quality generation that’s liable for finding the metals which are deep within the ground. The era may also be set in some way that it’s going to best pinpoint and provide you with a warning whilst it comes into contact with that metal. It’s mainly used by individuals who hunt for treasures or gold deep underground.