--- product_id: 153201697 title: "SenTECH 40W CO2 Glass Laser Tube 700mm Length Dia 50mm for Laser Engraving and Cutting Machine (Buy More Discounts)" brand: "sentech" price: "1158.51 DT" currency: TND in_stock: true reviews_count: 8 category: "Sen Tech" url: https://www.desertcart.tn/products/153201697-sentech-40w-co2-glass-laser-tube-700mm-length-dia-50mm store_origin: TN region: Tunisia --- # 40W stable power output 700mm precision length Pre-installed leads for quick setup SenTECH 40W CO2 Glass Laser Tube 700mm Length Dia 50mm for Laser Engraving and Cutting Machine (Buy More Discounts) **Brand:** sentech **Price:** 1158.51 DT **Availability:** βœ… In Stock ## Summary > πŸš€ Elevate your engraving game with power and precision! ## Quick Answers - **What is this?** SenTECH 40W CO2 Glass Laser Tube 700mm Length Dia 50mm for Laser Engraving and Cutting Machine (Buy More Discounts) by sentech - **How much does it cost?** 1158.51 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/153201697-sentech-40w-co2-glass-laser-tube-700mm-length-dia-50mm) ## Best For - sentech enthusiasts ## Why This Product - Trusted sentech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to last longer:** Advanced tech ensures extended tube lifespan, minimizing downtime and replacement costs. - β€’ **Crafted for creators:** Perfectly tailored for laser engraving and cutting pros who demand reliability and speed. - β€’ **Power that keeps pace:** 40W upgraded laser tube delivers consistent, high-speed cutting performance. - β€’ **Plug & play installation:** Pre-connected leads make setup effortlessβ€”get your machine running faster. - β€’ **Precision engineered length:** 700mm glass tube designed for optimal fit and maximum engraving accuracy. ## Overview The SenTECH 40W CO2 Glass Laser Tube features a 700mm length and 50mm diameter, delivering stable 40-watt power output optimized for laser engraving and cutting machines. Pre-installed leads simplify installation, while advanced manufacturing technology extends tube life, ensuring reliable, high-speed performance for professional and hobbyist laser users alike. ## Description IntroductionOutput power: 40 WDimensions: Length 700 mmInstallation instructions:1. Determine the positive and negative poles of the laser tube ( Near the spiral glass tube inside is positive and the other is negative).2. Insert the water inlet pipe and outlet pipe into the water, usually the positive high pressure line is the input, the part of light output is the exit. Before you launch the machine, you need to check the tube to see whether it is normal. 3. Adjust the optical path with the laser and test switch on the machine. The ultimate goal is to make the laser point enter from the middle of the entrance hole of the laser head, and then adjust the vertical optical path.4. When the light path is adjusted, the engraving can be cut or used, according to the actual situation to control the power output.[WARNING]1. The high-voltage power supply of the laser requires reliable isolation!2. The cooling water should have at least 20 liters, and change it every two weeks.Suitable temperature less than 30 grades3. In winter, the water in the laser tube needs to be discharged first to prevent the tube from freezing and cracking.4.This laser product is not visible light. The laser beam has a burn or more serious damage to the body. In the area of ​​the optical path of the optical transmission, the laser burn must be avoided during work and when you using !Avoid of unnecessary damage, please open one end of the tube and then take the tube out carefully. Review: Installed leads makes install a breeze - So thankful for the installed leads on the ends. My laser was quickly back up and running. I also think that the packaging was excellent, so that I didn't have to worry about it arriving broken. Hopefully, I will not need another tube any time soon, but if I do - I will order here. Note to laser hobbyists - My laser was by a window, and vented out. My laser froze during a deep freeze and broke. If you have your laser conveniently vented by a window, make sure your laser tube does not freeze!! Review: Dropped into Full Spectrum Hobby Gen 5 No Problem - This dropped in to replace my 40W bulb on my Full Spectrum Laser Hobby 5th Gen. It's working great. I would love to know how many mA to get the most efficient use, but I can't find that information. It was easy to replace the old bulb and is working great. ## Features - 1. [Parameters]: 40 Watt 700mm length Ø50mm - 2. Each tube HAS BEEN TESTED before leaving from our factory, we try our best to give a good shopping experience and make you not waste time and lose money. - 3. [Installation]: You need to make sure the positive and negative pole. We HAVE CONNECTED the LEADS, so that you can quickly install the tube. - 4. [Upgraded version]: Upgraded laser tube has a more stable power, which is favorable to increase the cutting speed. The tube has LONG-TIME LIFE because of the especial technology. - 5. [Application]: It is mainly used for LASER ENGRAVING CUTTING MACHINE and other engraving equipments. If it is broken in the transportation, contact us please, we are trying our best to solve your problem. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RX5V42F | | Best Sellers Rank | #442,940 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #1,242 in Jewelry Making Engraving Machines & Tools | | Brand | SenTECH | | Brand Name | SenTECH | | Color | Transparent | | Customer Reviews | 4.0 out of 5 stars 53 Reviews | | Item Dimensions L x W | 27.56"L x 1.97"W | | Item Weight | 1.63 kg | | Level Measurement Type | laser | | Level Measurement Units | millimeter | | Manufacturer | SenTECH | | Manufacturer Part Number | LASER-Tube-40W-700-Ameri | | Material | Glass | | Material Type | Glass | | Number of Items | 1 | | Operation Mode | Automatic | | Product Dimensions | 27.56"L x 1.97"W | | Style | Laser | | Style Name | Laser | | UPC | 791307559598 | | Unit Count | 1 Count | ## Product Details - **Brand:** SenTECH - **Color:** Transparent - **Material:** Glass - **Product Dimensions:** 27.56"L x 1.97"W - **Style:** Laser ## Images ![SenTECH 40W CO2 Glass Laser Tube 700mm Length Dia 50mm for Laser Engraving and Cutting Machine (Buy More Discounts) - Image 1](https://m.media-amazon.com/images/I/3177vAO57NL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can i run a rv antifreeze insted of water to prevent freezing?** A: NO, has to be water. It's not used to prevent freezing, not for melting **Q: What is the beam radius and divergence?** A: Hi, dear. The beam radius is about 1.5mm. **Q: I got this tube and it is 4 inches longer than my original will it still work for my machine?** A: If this fits in your machine you'll need to make sure the power supply matches up to the power requirements of the tube. Without any other information it seems like you have the wrong tube. **Q: I had issues with pre-wired tubes that there would be arking where the two lines are spiced together. What is the proper way to avoid this?** A: I didn't have that issue with this tube. Arcing suggest poor connection. Make sure you have a good amount of bare wire . If your still worried, you can solder the connection. Make sure to insulate the connection. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Installed leads makes install a breeze *by D***G on January 27, 2023* So thankful for the installed leads on the ends. My laser was quickly back up and running. I also think that the packaging was excellent, so that I didn't have to worry about it arriving broken. Hopefully, I will not need another tube any time soon, but if I do - I will order here. Note to laser hobbyists - My laser was by a window, and vented out. My laser froze during a deep freeze and broke. If you have your laser conveniently vented by a window, make sure your laser tube does not freeze!! ### ⭐⭐⭐⭐⭐ Dropped into Full Spectrum Hobby Gen 5 No Problem *by P***E on October 5, 2023* This dropped in to replace my 40W bulb on my Full Spectrum Laser Hobby 5th Gen. It's working great. I would love to know how many mA to get the most efficient use, but I can't find that information. It was easy to replace the old bulb and is working great. ### ⭐ Tube arrived defective *by L***A on February 10, 2024* I installed this laser tube and a new Power Supply Unit (PSU) at the same time. The laser tube would fire, but not fire at full strength. (See the old and new Power vs Speed charts photo) A brand new laser tube should easily be able to cut through 3mm Baltic Birch plywood using the settings you see on the left. As you can see in the chart on the right, even at 100% Power and 14% Speed, the laser could not cut through. Then I noticed that when the laser ran, it would start flickering after a few seconds. The positive terminal of the laser operates at extremely high voltage (~20,000 Volts). I was worried that maybe the electricity was short circuiting to the case at some point along the wire. That's why I coated the wire connection point AND the terminal of the laser with thick globs of silicone (Please see photo of laser inside.) I also placed a sheet of plexiglass between the laser tube and the metal case. (plexiglass has higher electrical resistance than air) Still, the laser was flickering when it ran. Finally, I tried running the laser in the dark. As you can see from the flashing light in the video, at the positive end of the laser tube something is short circuiting. The flash is happening inside the tube. I know it's not happening at the far side of the tube because there's a sheet of plexiglass between the tube and the wall, and the plexiglass shows no sign of damage. Therefore no electricity is going through it, therefore the short circuit is in the tube. Plus I've tried the machine with 2 other working PSUs and they did not fix the problem. Therefore, again, the problem is this tube. Since the short circuit is inside the laser tube, the laser tube itself is defective. I would like to request a new, fully functional tube be sent to me. ## Frequently Bought Together - SenTECH 40W CO2 Glass Laser Tube 700mm Length Dia 50mm for Laser Engraving and Cutting Machine (Buy More Discounts) - MCWlaser Set of 2 High Voltage Wire Connector Between CO2 Power Supply and CO2 Laser Tube for Laser Cutting Machine high Voltage Head - TEN-HIGH 40W CO2 Laser Tube 700mm D50mm, Wires Preconnected with Coating, for Laser Cutter Laser Engraving Cutting Machine --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/153201697-sentech-40w-co2-glass-laser-tube-700mm-length-dia-50mm](https://www.desertcart.tn/products/153201697-sentech-40w-co2-glass-laser-tube-700mm-length-dia-50mm) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-28*