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A handheld gas leak detector helps locate a leak source. It is not a substitute for a fixed gas alarm or a professional.

If you smell gas, leave the building and call your gas utility or emergency services. This guide is built from Amazon product listings, not our own testing, so confirm specs, safety ratings and current price on each product page.

Prices are approximate US dollar conversions of what Amazon showed on October 31, 2026.

Last updated: October 31, 2026.

Quick Picks

Product Type Best for
TopTes PT177 Gas Leak Detector Gas leak detector Low-cost sniffer
PT199 Natural Gas Leak Detector Gas leak detector Audible and visual alarm
Klein Tools ET190 Compact gas leak detector Compact Klein detector
TOPTES PT-336 Rechargeable Gas Detector Rechargeable gas detector 0 to 9999 PPM range
PT520A Natural Gas Detector Gas leak detector 17-inch gooseneck
Klein Tools ET120 Gas leak detector Professional brand

Our Picks

1. TopTes PT177 Gas Leak Detector

A TopTes PT177 gas leak detector with audible and visual alarm, per the listing. It was shown at about $18 on Amazon.com on October 31, 2026.

Good for: Low-cost sniffer. Watch out: not a replacement for professional inspection.

Check on Amazon

2. PT199 Natural Gas Leak Detector

A PT199 natural gas leak detector with audible and visual alarm, per the listing. It was shown at about $23 on Amazon.com on October 31, 2026.

Good for: Audible and visual alarm. Watch out: not a replacement for professional inspection.

Check on Amazon

3. Klein Tools ET190

A Klein Tools ET190 compact gas leak detector, per the listing. It was shown at about $30 on Amazon.com on October 31, 2026.

Good for: Compact Klein detector. Watch out: check gases detected on the page.

Check on Amazon

4. TOPTES PT-336 Rechargeable Gas Detector

A TOPTES PT-336 rechargeable natural gas detector with a 0 to 9999 PPM range, per the listing. It was shown at about $30 on Amazon.com on October 31, 2026.

Good for: 0 to 9999 PPM range. Watch out: not a replacement for professional inspection.

Check on Amazon

5. PT520A Natural Gas Detector

A PT520A natural gas detector with a 17-inch gooseneck to locate the source, per the listing. It was shown at about $40 on Amazon.com on October 31, 2026.

Good for: 17-inch gooseneck. Watch out: not a replacement for professional inspection.

Check on Amazon

6. Klein Tools ET120

A Klein Tools ET120 gas leak detector, per the listing. It was shown at about $130 on Amazon.com on October 31, 2026.

Good for: Professional brand. Watch out: high price.

Check on Amazon

How to Choose

Gases detected

Check which gases are covered.

Sensitivity

Adjustable models help.

Safety

Use as a locating aid only.

Frequently Asked Questions

Can I rely on it alone?

No.

Cheapest?

The PT177.

Brand?

Klein.

Bottom Line

For budget, the PT177 or PT199. For a brand, the Klein ET190.

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