--- product_id: 76638412 title: "GL-3001–21 Gas Level Monitor" brand: "gaslock" price: "752.67 DT" currency: TND in_stock: true reviews_count: 13 category: "Gaslock" url: https://www.desertcart.tn/products/76638412-gl-3001-21-gas-level-monitor store_origin: TN region: Tunisia --- # Ultrasonic sensor precision Battery-powered portability Lightweight 40g design GL-3001–21 Gas Level Monitor **Brand:** gaslock **Price:** 752.67 DT **Availability:** ✅ In Stock ## Summary > ⛽ Never run dry, always stay fly with Gaslock GL-3001-21! ## Quick Answers - **What is this?** GL-3001–21 Gas Level Monitor by gaslock - **How much does it cost?** 752.67 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/76638412-gl-3001-21-gas-level-monitor) ## Best For - gaslock enthusiasts ## Why This Product - Trusted gaslock brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Visual Alarm Alerts:** Stay informed instantly with clear visual alarms that keep you ahead of running out. - • **Ultra-Light & Portable:** At just 40 grams, it’s easy to carry and install anywhere without bulk. - • **Battery-Powered Freedom:** No cords, no hassle—monitor your gas levels on the go with reliable battery operation. - • **Versatile Compatibility:** Works beyond standard bottle sizes, making it perfect for diverse camping and caravan setups. - • **Precision Ultrasonic Sensing:** Accurately measures gas levels even on larger 47Kg bottles, defying typical size limits. ## Overview The Gaslock GL-3001-21 is a lightweight, battery-powered ultrasonic gas level monitor designed to provide precise readings on a variety of gas bottle sizes, including larger 47Kg cylinders. Featuring visual alarms and a compact design, it offers versatile and portable gas monitoring ideal for campers, caravan owners, and professionals seeking reliable fuel level insights. ## Description Item Package Quantity: 1 Package Weight: 40 grams Package Dimensions (L x B x H) in cm: 20.2 x 9.1 x 1.7 Model Number: GL-3001-21 Review: Works just fine on my 47Kg calor gas bottles - In short this product works fine on 47Kg gas bottles, even thought the instructions only mentions 5, 11 and 33Kg bottles. The site where my static caravan is based only sells gas in the 47Kg propane bottles. Most ultrasound-based products make it clear they only work on cylinders 200 to 350 mm in diameter, but the 47Kg is dia 375mm. I even wrote to Truma technical services and they confirmed 375mm is outside the operating range of their product. Given the price tag I decided not to take the risk. This little fella came up trumps, though, and as a bonus is quite a bit cheaper than the other branded ultrasound devices. I tried it on 3 gas bottles where I had a rough idea of levels and it worked just fine on all 3. The levels were what I was expecting - one about 1/5th full, one about a quarter and the other a full bottle. Happy camper! Glad I took a chance on the Gaslock. Review: WASTE OF MONEY - I bought this item in April 2016. It has never been successful, I should have returned it immediately. My error was to persevere with it. I shouldn't have. This is £24, plus time, totally wasted. Considering its task, this is an expensive piece of useless kit and I cannot get a refund. That shows the faith of the manufacturer. Please do not buy one, learn from my experience. I've been camping since 1960's so have considerable experience with gas bottles and accessories. This does not work! ## Features - Item Package Quantity: 1 - Package Weight: 40 grams - Package Dimensions (L x B x H) in cm: 20.2 x 9.1 x 1.7 - Model Number: GL-3001-21 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00JE7T268 | | Alarm | Visual | | Brand | Gaslock | | Colour | Multi-coloured | | Customer Reviews | 3.7 out of 5 stars 311 Reviews | | Global Trade Identification Number | 04250348831217 | | Item Weight | 40 Grams | | Item weight | 40 Grams | | Manufacturer | GASLOCK | | Material | Butane | | Model Number | GL-3001-21 | | Number of Items | 1 | | Operating Humidity | 90 percent | | Part Number | GL-3001-21 | | Power source | Battery Powered | | Product Style | Klassisch | | Sensor Type | Ultrasonic | | Style | Klassisch | | Unit Count | 1.0 count | ## Product Details - **Alarm:** Visual - **Brand:** Gaslock - **Colour:** Multi-coloured - **Global Trade Identification Number:** 04250348831217 - **Item weight:** 40 Grams - **Material:** Butane - **Operating humidity:** 90 percent - **Power source:** Battery Powered - **Sensor type:** Ultrasonic - **Style:** Klassisch ## Images ![GL-3001–21 Gas Level Monitor - Image 1](https://m.media-amazon.com/images/I/41Rj22QdqGL.jpg) ## Questions & Answers **Q: The specification mentions use on 5, 11 , 33 kg propane bottles - is that crucial ? We use 13kg bottles on our motorhome will this device work ? Thank** A: Hi, The mentioned bottles are just an example. It works on all gas bottles. Kind regards, Sándor Körössy **Q: Would this work on a 19kg red propane gas bottle?** A: Yes it shows you the level of liquid in the bottle **Q: with mixed reviews I would like to know if is accurate to check the level of gas in our caravan refillable bottles on site** A: It works sometimes,not others. Works more often on my 6kg bottles in caravan but never works on 13kg bottles on patio equipment. Very hit and miss. **Q: will this device work with 47kg propane ? no idea if they are alu or not** A: i could not get this product to work on anything ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works just fine on my 47Kg calor gas bottles *by M***E on 11 March 2024* In short this product works fine on 47Kg gas bottles, even thought the instructions only mentions 5, 11 and 33Kg bottles. The site where my static caravan is based only sells gas in the 47Kg propane bottles. Most ultrasound-based products make it clear they only work on cylinders 200 to 350 mm in diameter, but the 47Kg is dia 375mm. I even wrote to Truma technical services and they confirmed 375mm is outside the operating range of their product. Given the price tag I decided not to take the risk. This little fella came up trumps, though, and as a bonus is quite a bit cheaper than the other branded ultrasound devices. I tried it on 3 gas bottles where I had a rough idea of levels and it worked just fine on all 3. The levels were what I was expecting - one about 1/5th full, one about a quarter and the other a full bottle. Happy camper! Glad I took a chance on the Gaslock. ### ⭐ WASTE OF MONEY *by M***S on 2 April 2017* I bought this item in April 2016. It has never been successful, I should have returned it immediately. My error was to persevere with it. I shouldn't have. This is £24, plus time, totally wasted. Considering its task, this is an expensive piece of useless kit and I cannot get a refund. That shows the faith of the manufacturer. Please do not buy one, learn from my experience. I've been camping since 1960's so have considerable experience with gas bottles and accessories. This does not work! ### ⭐⭐⭐⭐⭐ Excellent and easy to use!!! *by M***S on 4 February 2016* Brilliant item. Takes the guess work out of knowing how much gas is left in the bottles! Quickly received. ## Frequently Bought Together - Gaslock GL-3001–21 Gas Level Monitor - ProPlus 341215 Leveller Pyramid with Magnet - HEOSolution 5251 Water Connector with Gardena, Blue --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/76638412-gl-3001-21-gas-level-monitor](https://www.desertcart.tn/products/76638412-gl-3001-21-gas-level-monitor) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-05*