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Description
Milesight EM300-MCS LoRaWAN Magnetic Contact, Temperature, and Humidity SensorRugged 3 in 1 Monitoring for Demanding Environments Introducing the Milesight EM300 MCS, a robust LoRaWAN sensor designed for comprehensive monitoring in the most challenging conditions. This compact device goes beyond simple security by integrating three essential sensors: a high sensitivity magnetic contact switch for doors and windows, a precise temperature sensor, and a reliable humidity sensor. Built for outdoor and industrial applications, its
Rugged 3-in-1 Monitoring for Demanding Environments
Introducing the Milesight EM300-MCS, a robust LoRaWAN® sensor designed for comprehensive monitoring in the most challenging conditions. This compact device goes beyond simple security by integrating three essential sensors: a high-sensitivity magnetic contact switch for doors and windows, a precise temperature sensor, and a reliable humidity sensor. Built for outdoor and industrial applications, its IP67 waterproof and UV-resistant enclosure ensures long-term performance, providing real-time alerts and environmental data to your fingertips. Ideal for smart buildings, warehouse management, and remote facility oversight, the EM300-MCS offers a powerful, all-in-one solution for security and environmental awareness.
Key Features
- Triple Sensing Capability: Monitors door/window open/close status while providing accurate ambient temperature and humidity readings.
- Ultra-Long Range Transmission: Leverages LoRaWAN® technology to transmit data up to 10 km in line-of-sight conditions, ensuring connectivity for even the most remote assets.
- Industrial-Grade Durability: Features an IP67-rated housing, making it completely dust-tight and waterproof for reliable operation in harsh environments.
- Extended Battery Life: Powered by a high-capacity 4000 mAh Li-SOCL2 battery, it can operate for over 5 years, with an optional second battery to extend life to 10 years.
- Simple NFC Configuration: Quickly and easily configure the device in the field using Near Field Communication (NFC) with a smartphone or PC.
- Onboard Data Storage: Locally stores up to 3,000 historical records and supports data retransmission to prevent data loss during network outages.
Technical Specifications
| Wireless Transmission | |
|---|---|
| Technology | LoRaWAN® |
| Frequency | CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923 |
| Tx Power | Up to 20 dBm |
| Sensitivity | -147dBm @300bps |
| Mode | OTAA/ABP Class A |
| Sensing | |
| Magnetic Contact | |
| Detection Distance | 20 - 30 mm |
| Cable Length | 260 mm |
| Temperature | |
| Range | -30°C to +70°C |
| Accuracy | ±0.3°C (0°C to 70°C), ±0.6°C (-30°C to 0°C) |
| Resolution | 0.1°C |
| Humidity | |
| Range | 0% to 100% RH |
| Accuracy | ±3% (10-90% RH), ±5% (other ranges) |
| Resolution | 0.5% RH |
| Physical Characteristics | |
| Power Supply | 1 × 4000 mAh ER18505 Li-SOCL2 Battery (extendable to 2) |
| Operating Temperature | -30°C to +70°C |
| Ingress Protection | IP67 |
| Dimensions | 88 × 87 × 27 mm |
| Mounting | Wall (screws or 3M adhesives) |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 4
Badass speaker🔊
Color: Black
It’s one powerful speaker. 🔈 I’ll have to do another survey after I use it for a couple day I’ve only turned it on once for only 10 minutes but so far so good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 5
Fast, Reliable, and Stunning Print Quality — Best 3D Printer Value!
Set name: Ender 3 V3 SE
The Creality Ender 3 V3 SE is an absolute powerhouse for the price! At 250mm/s print speed with CR Touch auto leveling, this thing sets up fast and prints reliably right out of the box. The Sprite direct extruder handles flexible and rigid filaments with ease, and the print quality is stunning. Whether you're prototyping custom parts, printing jigs and fixtures, or cranking out creative projects, this printer delivers every time. Best 3D printer value on the market — period!
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Not the biggest kid on the schoolyard, but plays a solid ground game.
Set name: K2 SE, Set name: K2 SE
The K2SE is an excellent printer for users who are still interested in learning and growing within the 3D-printing ecosystem, but who no longer want to spend the majority of their time troubleshooting basic hardware issues. While it may not be a flagship, top-tier machine by today’s standards, it represents a significant step forward—especially when compared side-by-side with older platforms like the Ender 3 Pro.
Out of the box, the K2SE delivers a level of refinement that once required extensive upgrades on earlier printers. Features such as automatic bed leveling, filament runout detection, a sturdier frame with vibration-dampening feet, and a properly supported raised Z-axis bed all come standard. The addition of cloud access and a fluid web interface—complete with optional root access for advanced users—bridges the gap between a consumer-friendly machine and a system that still rewards technical curiosity.
My first print, a simple Kirby model, was intentionally done with minimal tuning to get a baseline feel for the machine. The results were impressive, especially coming from years of compensating for aging components on my Ender 3. With that printer long overdue for a new extruder, I had grown accustomed to managing variables that simply don’t exist on the K2SE. The consistency and reliability here are immediately noticeable.
Although I didn’t have the budget to add the multi-filament CRT system at launch, the printer’s upgrade path is clearly well thought out. Planned expansions like an enclosure, camera monitoring, and multi-material support make it easy to justify future investments. I would also welcome a firmware or hardware update that introduces Bowden extruder support, as it could further improve filament switching speeds and overall print performance.
As someone who has stuck with the same Ender 3 since long before touchscreens, CR-Touch, and modern quality-of-life upgrades became commonplace, it’s refreshing to see Klipper remain a core component of the K2SE. For users who are on the fence about moving away from heavy DIY builds, this printer strikes a compelling balance—offering reliability and speed without sacrificing control.
Perhaps the most underrated benefit is time savings. The K2SE is noticeably faster than older models, and its intuitive touchscreen interface makes it accessible even for non-technical users in my household. After setup, my wife and children can confidently start prints on their own, which speaks volumes about the usability of the system.
Print quality alone justifies the upgrade for patient users. While some may find the stock cooling fans slightly underpowered, the machine compensates with excellent compatibility for multi-tool and threaded expansion systems—an advantage over many Bowden-dependent designs that require significant modification for production or multi-material workflows.
And as a final bonus, despite being scheduled for February delivery, the K2SE arrived weeks early. Getting this machine ahead of schedule was the perfect way to confirm that the upgrade was absolutely worth it for the value price point.
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Reviewed in the United States on January 8, 2026
★★★★★ 1
Don’t buy
Set name: K2 SE Combo, Set name: K2 SE Combo
This printer is pretty awesome. Here is the biggest catch to it. We have spent hundreds of dollars on the app and or validating what we could buy between buying filament and everything else. This thing does not connect properly. It is very technical if you are not smart. This is a terrible thing to buy. I’m a very educated person and so are the other 3 to 4 people in my household that have all tried to use this thing it will not let you change individuals to print off it and even the amount of money you spend to buy credit credits and or other items that you want to purchase in the store do not print properly. This sucks don’t buy it even though this equipment is awesome. This is the worst thing I wish I’d never bought. I do not say this in the test and or ignorance I have studied. I have read up. I’ve looked at forums. I’ve been on Reddit. Everyone says this creatality is extremely difficult and we have definitely found this out firsthand. I would definitely return this, but I think my window has closed. It sucks when you buy a product and you have it for like 2 to 3 weeks before you get to use it but then your window to return it is closed. The app does not match what is online and or if you have more than one person that wants to print, you cannot share unless the other person is logged out and even if the person is logged out, it does not always match the same, so for example, I have tons of money and credit on my account, but it will not let me print out certain apps and or creations then it tells me that it will work on our item that we have purchased, but then it’ll say it does not work. It will not print. 3-D printer is a scam. It sucks. It has great potential but this is not the one for you. Don’t waste your money too much money.
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Forget Adventurer 5M , This is the true and easy to use beginner machine
Set name: Ender 3 V3 SE
This is my 3rd 3d printer. Once I spent about 45 minutes assembling it has been printing nonstop since the amazon driver dropped it off, these are the best for reliability and perfect for hobbyists. It is not the quickest machine out there, but it makes up for it with a quality print good price as well.
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Reviewed in the United States on May 25, 2026