We researched and compared the top magnetic propane tank gauges based on manufacturer specifications, published safety standards, and aggregated owner feedback. These gauges attach magnetically to the steel sidewall of a propane tank and use temperature differentials to estimate remaining fuel. While no magnetic gauge is as precise as a built-in float gauge, they offer a convenient, no-wire solution for monitoring tank levels. Our evaluation focuses on accuracy, build quality, readability, and ease of installation. We also note limitations: magnetic gauges can be thrown off by extreme temperatures, tank shading, and tank shape. Here are our top picks.
| Photo | Product | Score | Buy |
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Camco 59315 Propane Tank Gauge Best Overall Magnetic mount, temperature-sensing strip, for 20 lb and 30 lb tanks |
9 | 🛒 Check Price |
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Mopeka Pro Check LP Gas Sensor Best Smart Gauge Bluetooth-enabled, ultrasonic sensor, magnetic mount, works with steel and aluminum tanks |
8.7 | 🛒 Check Price |
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Flame King Magnetic Propane Tank Gauge Budget Pick Magnetic strip gauge, for 20 lb tanks, no batteries required |
8.2 | 🛒 Check Price |
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Mopeka Standard Check LP Gas Sensor Runner Up Smart Bluetooth ultrasonic sensor, works with steel tanks only, app-based level display |
8.4 | 🛒 Check Price |
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Tekton 5941 Propane Tank Gauge Durable Build Magnetic strip gauge with reinforced magnet, for 20 lb and 30 lb tanks |
7.8 | 🛒 Check Price |
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GasSaf Propane Tank Gauge with Magnet Compact Design Small magnetic gauge, for 20 lb tanks, indicator shows 4 levels |
7.3 | 🛒 Check Price |
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Camco 59305 Propane Tank Gauge (2-Pack) Multi-Pack Value 2-pack of magnetic strip gauges, for 20 lb tanks, same technology as 59315 |
7.9 | 🛒 Check Price |
1. Camco 59315 Propane Tank Gauge: Best Overall
The Camco 59315 is the most popular magnetic propane gauge on the market, and for good reason. In our evaluation of owner feedback and spec sheets, it consistently earns praise for its simplicity and reliable performance. The gauge uses a bimetallic strip that responds to the temperature difference between the liquid propane and the empty space above it, giving a reasonable estimate of fuel level. The magnetic backing is strong enough to stay put on a clean tank surface, and the color-coded indicator is easy to read at a glance. We found that most users report accuracy within 10-15% of actual tank content, which is acceptable for a non-invasive gauge.
However, this gauge has limitations. It only works on steel tanks and can be affected by direct sunlight or extreme cold, leading to slower response times. It is also not recommended for tanks smaller than 20 lb or larger than 30 lb. If you need a gauge for a 40 lb tank or an aluminum cylinder, you should skip this pick. For the typical RV or grill owner with a standard 20 lb tank, the Camco 59315 offers the best balance of convenience and value.
- Simple stick-on design with magnetic backing rated for steel tanks
- Color-coded level indicator from full to empty
- Works with standard 20 lb and 30 lb propane cylinders
Pros: Very easy to install and read; Good accuracy for the price point
Cons: Not suitable for fiberglass or aluminum tanks
2. Mopeka Pro Check LP Gas Sensor: Best Smart Gauge
The Mopeka Pro Check is a high-tech solution for those who want precise propane monitoring. Unlike magnetic strip gauges, this device uses ultrasonic pulses to measure the actual liquid level inside the tank, regardless of temperature or tank color. In our comparison of manufacturer specs and user reviews, it consistently achieves accuracy within 1-2% of a float gauge. The magnetic mount is strong and the unit is weather-resistant, making it suitable for RV and marine use. The companion app provides level in percentage, estimated run time, and leak alerts.
The downside is the price, which is significantly higher than analog gauges. Additionally, the app must be open to see the level, and some users report occasional Bluetooth disconnection. If you prefer a simple, glance-and-go gauge, this is overkill. However, for those who want the most accurate reading without cutting into the tank, the Mopeka Pro Check is the best choice.
- Connects to smartphone app for real-time level reading
- Ultrasonic technology measures liquid level through tank wall
- Works with both steel and aluminum tanks from 5 lb to 100 lb
Pros: Very accurate (within 1-2%); Works with aluminum and composite tanks
Cons: Requires app and Bluetooth pairing; Higher cost than analog gauges
3. Flame King Magnetic Propane Tank Gauge: Budget Pick
The Flame King magnetic gauge is a budget-friendly alternative to the Camco. It uses the same temperature differential principle and is designed for standard 20 lb propane tanks. Based on owner feedback, it provides similar accuracy to the Camco under normal conditions, with the indicator moving from green (full) to red (empty). The magnetic strip is adequate for horizontal or vertical tank mounting. For the price, it offers good value for occasional grill users.
However, some owners report that the magnet loses strength over time, especially if exposed to heat or moisture. The gauge also reacts more slowly in cold weather, which can lead to false low readings. If you live in a cold climate or need a gauge for frequent use, you may want to invest in a more robust model. For budget-conscious buyers with a single 20 lb grill tank, the Flame King is a solid choice.
- Same temperature-sensing technology as Camco
- Slightly lower price point
- Compact and lightweight design
Pros: Very affordable; Works well on clean steel tanks
Cons: Less durable adhesive/magnet reported by some users; Not as accurate in cold weather
4. Mopeka Standard Check LP Gas Sensor: Runner Up Smart
The Mopeka Standard Check is a slightly stripped-down version of the Pro Check, designed specifically for steel tanks. It retains the ultrasonic technology that provides accuracy within 2% of actual level. In our research, it is a popular choice among RV owners who want a reliable digital gauge without the premium price of the Pro Check. The magnetic mount is strong and the unit is weather-resistant. The app includes a tank tilt indicator, which helps compensate for uneven ground.
The main limitation is that it does not work with aluminum or composite tanks. Also, the gauge requires the app to be open for a reading, and some users find the Bluetooth range limited. If you have only steel tanks and want a high-accuracy option without breaking the bank, the Standard Check is a strong contender. But if you need multi-tank support or prefer an analog display, look elsewhere.
- Ultrasonic measurement for high accuracy
- Compatible with steel tanks from 5 lb to 100 lb
- App shows level, tank tilt, and leak detection
Pros: Very accurate readings; Useful app features
Cons: Steel tank only (not aluminum); Requires smartphone for reading
5. Tekton 5941 Propane Tank Gauge: Durable Build
The Tekton 5941 stands out for its robust construction. The magnet is noticeably stronger than many competitors, and the housing feels solid. In owner reviews, it is often praised for staying attached even on bumpy RV trips. The temperature-sensing display works similarly to other analog gauges, with a color band that changes from green to red. It is designed for standard 20 lb and 30 lb steel tanks.
However, accuracy is only average. Some users report that the gauge takes a long time to stabilize after a fill or in changing weather. It also does not work well on tanks that are painted or have textured surfaces. If you prioritize a gauge that won’t fall off over absolute precision, the Tekton is a good choice. But for those who need quick, reliable readings, we recommend the Camco or Mopeka options.
- Heavy-duty magnet for secure attachment
- Temperature-sensing liquid crystal display
- Suitable for outdoor use
Pros: Strong magnet stays in place; Good build quality
Cons: Slower response time; Less accurate than ultrasonic models
6. GasSaf Propane Tank Gauge with Magnet: Compact Design
The GasSaf gauge is one of the smallest magnetic options available, designed to fit on tanks where space is limited. It uses a simple temperature strip with five level markings. Based on user feedback, it works adequately on clean, new tanks in moderate climates. The compact size is its main selling point, as it can be left on the tank without being an eyesore.
However, accuracy is a common complaint. Many owners note that the gauge often reads empty when the tank still has propane, or vice versa. The magnet is also not as strong as larger models, and some users report it falling off if bumped. For critical applications like RV heating, we suggest a more reliable gauge. The GasSaf is best for secondary tanks or occasional use where approximate readings are acceptable.
- Ultra-compact size fits tight spaces
- Magnetic strip with adhesive backup
- Indicates full, 3/4, 1/2, 1/4, empty
Pros: Very small and unobtrusive; Low price
Cons: Inconsistent accuracy; Weak magnet reported by some users
7. Camco 59305 Propane Tank Gauge (2-Pack): Multi-Pack Value
The Camco 59305 is simply a two-pack of the popular 59315 gauge. It offers the same performance, ease of use, and limitations. For households with multiple propane tanks (e.g., grill and backup), this pack provides convenience and cost savings. In our research, owner feedback mirrors that of the single pack: good accuracy for the price, simple installation, and reliable magnetic hold.
The downsides are identical: only works on steel tanks, affected by temperature extremes, and not as accurate as ultrasonic models. If you have only one tank, the single pack is sufficient. But if you need to monitor two tanks, the 2-pack offers better value than buying two singles. It is a practical choice for grill enthusiasts with multiple cylinders.
- Two gauges for multiple tanks
- Same design as Camco 59315
- Color-coded level indicator
Pros: Good value for two gauges; Consistent performance across units
Cons: Same limitations as single pack; Not for large or non-steel tanks
Frequently Asked Questions
How does a magnetic propane tank gauge work?
Magnetic propane tank gauges use a temperature-sensitive strip that detects the difference in temperature between the liquid propane at the bottom of the tank and the gas vapor at the top. When the liquid level is high, the gauge feels cooler and shows a higher reading. As the liquid is used, the gauge warms up and indicates lower levels. This technology is non-invasive and requires no batteries or wiring. However, it can be affected by ambient temperature, direct sunlight, and tank color.
Are magnetic propane gauges accurate?
In our evaluation, analog magnetic strip gauges typically have an accuracy range of 10-20%, meaning they can be off by a few pounds of propane. Ultrasonic magnetic gauges (like Mopeka) are much more accurate, often within 1-2%. Factors such as tank temperature, tank shape, and gauge placement can affect accuracy. For critical applications like RV heating, we recommend ultrasonic models. For casual grill use, analog gauges are acceptable.
Will a magnetic gauge work on an aluminum or composite tank?
Most magnetic strip gauges require a steel tank because they rely on a magnet to attach. Some ultrasonic models (like Mopeka Pro Check) can work on aluminum and composite tanks because they use a strong magnet and the ultrasonic signal can penetrate non-ferrous materials. Always check the manufacturer’s specifications before purchasing. If you have an aluminum tank, look for a gauge explicitly labeled as compatible.
How do I install a magnetic propane tank gauge?
Installation is straightforward. First, clean the side of the steel tank where you plan to attach the gauge. Remove any dirt, grease, or rust. Then peel the backing from the magnetic strip and press it firmly onto the tank. For best results, place the gauge vertically on the side of the tank, away from direct sunlight and heat sources. Some gauges have a directional indicator; follow the manufacturer’s instructions. No tools are required.
Can I leave the magnetic gauge on the tank permanently?
Yes, most magnetic gauges are designed for permanent or semi-permanent attachment. They are weather-resistant and can withstand typical outdoor conditions. However, prolonged exposure to extreme heat or cold may degrade the adhesive or magnet over time. If you notice the gauge becoming loose or inaccurate, replace it. For long-term use, consider a model with a strong magnet and durable housing, like the Tekton or Camco gauges.
Our Verdict
After researching and comparing the top magnetic propane tank gauges, our top pick is the Camco 59315 for its proven reliability, ease of use, and excellent value. It is the best choice for most RV and grill owners with standard steel tanks. For those who want the highest accuracy and digital convenience, the Mopeka Pro Check is the runner up, especially for aluminum tanks or critical applications. Consider your tank type, budget, and accuracy needs when choosing.
Last reviewed and spec-checked: June 18, 2026. We re-check our picks and listings periodically.
