10 Best sewer gas detectors of 2025

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Best Choice

1

Klein Tools
Klein Tools ET120 Gas Leak Detector, Combustible Gas Leak Tester with 18-Inch Gooseneck Has Range 50 - 10,000 ppm, Includes Pouch, Batteries
Main highlights

Wide Detection Range
Detects gas concentrations from 50 to 10,000 ppm for versatile monitoring.

Ideal for Leak Detection
Perfect for identifying gas leaks in residential and commercial spaces.

Praised Feature: Accuracy
Highly praised for its accuracy in finding hidden gas leaks.
9.9

Exceptional

Our Rating

9.1
Simple to use

8.7
Precision

8.4
worth the money
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Value for Money

2

TOPTES
TopTes Guard-101 Gas Detector, 4 Gas Monitor for H2S, CO, LEL and O2, with Vibration, Visual and Audible Alarms, 14h Long Battery Life, Safety Explosion-Proof, for Work, Home - Orange
Main highlights

Quick Detection and Safety Assurance
Guard-101 offers rapid detection of H2S, CO, LEL, and O2, ensuring safety with a 14-hour battery life for continuous monitoring.

Ideal for Industrial and Home Use
Suitable for industrial manufacturing, mining, agriculture, emergency rescue, and home safety monitoring.

High-Quality Build and User-Friendly Design
Praised for its robust ABS plastic casing, easy-to-read display, and intuitive alarm system.
9.8

Exceptional

Our Rating
3

EG
Gas Leak Detector & Natural Gas Detector: Portable Gas Sniffer to Locate Leaks of Multiple Combustible Gases Like Propane, Methane, LPG, LNG, Fuel, Sewer Gas with 12" Flexible Sensor Neck
Main highlights

Multiple Detectable Gases
Locates leaks from various gases including methane, propane, gasoline, and more, ensuring comprehensive safety and detection capabilities.

Flexible and Portable
Ideal for checking gas pipelines, fuel lines, and confined spaces both indoors and outdoors with its 12-inch flexible sensor neck and portability.

Ease of Use and Accuracy
Praised for its easy calibration, adjustable sensitivity, and high accuracy in detecting even small gas leaks, making it user-friendly and reliable.
9.6

Exceptional

Our Rating

9.7
worth the money

9.5
Easy installation

9.5
Simple to use
4

TOPTES
PT520A Natural Gas Detector, Gas Leak Detector with 17-Inch Gooseneck, Locating The Source Like Propane, Methane, and Butane for Home and RV (Includes Battery x3) - Orange
Main highlights

Accurate Detection of Combustible Gases
The TOPTES PT520A detects methane, propane, and other gases quickly and accurately.

Ideal for Home and RV Use
Perfect for detecting gas leaks in homes, RVs, and tight spaces.

Praised for Ease of Use
Customers love the easy setup, operation, and clear instructions.
9.5

Excellent

Our Rating

9.7
worth the money

9.7
Simple to use

9.3
Precision
5

FORENSICS DETECTORS FD
Sewer Gas Leak Detector by Forensics | 0-10,000ppm & 1ppm Resolution | Water, Dust & Explosion Proof | Li-Ion Battery | Natural Gas, Methane, Ammonia, Hydrogen Sulfide
Main highlights

Key Features
Features Japan-made sensor with 0-10,000ppm sensitivity, adjustable alarms, and durable design. Includes 1-year warranty and quality certification.

Ideal Use Cases
Perfect for inspectors, utility and refinery workers, maintenance engineers, ensuring safety in potentially hazardous environments.

Customer Praise
Highly praised for its accurate and sensitive readings, ensuring reliability and safety in critical working conditions.
9.4

Excellent

Our Rating

9.3
Simple to use

8.9
clearly written

8.2
Precision
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6

TOPTES

TOPTES Guard-633 H2S Detector, H2S Monitor Clip On with Precise Gas Sensor, 0.5S Fast Response, 7-Day Battery Life, Low Battery Alert, Adjustable Alarm Range, 3 Alarm Modes, Explosion-Proof Safety
9.2

Excellent

Our Rating
7

TOPTES
TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange

20% Off
Main highlights

Comprehensive Gas Detection
Detects LPG, methane, propane, and more, preventing gas explosions.

Ideal for Home and RV Use
Perfect for homeowners and RV enthusiasts with gas appliances.

Highly Praised Accuracy
Customers appreciate its accuracy in pinpointing gas leaks.
8.9

Very Good

Our Rating

9.7
Simple to use

9.5
Easy installation

9.5
worth the money
8

FORENSICS DETECTORS FD
Gas Leak Detector by Forensics | 10ft Drop Test Pass | Natural Gas, Alcohols, Methane, Combustibles, Acetone, Ethanol, Propane, Butane, Gasoline, Diesel, IPA, Toluene, LPG, LNG |
Main highlights

Key Features
Features Japan-made sensor, shock-resistant ABS housing, large LCD screen, and temperature display. Offers 1-year warranty and 7-year sensor life.

Ideal Uses
Perfect for inspectors, technicians, engineers needing reliable methane detection. Excels in rigorous environments due to its durability and accuracy.

Customer Praise
Most reviews highlight the sensor`s accuracy and the product`s overall durability as standout features, appreciating its reliability in professional settings.
8.6

Very Good

Our Rating

9.5
Simple to use

9.1
worth the money

9.1
Precision
9

Kidde
Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display
Main highlights

Easy Installation with Battery Backup
Simply plug into a 120V outlet; 9V battery ensures operation during power outages.

Ideal for Gas and CO Monitoring
Perfect for homes with natural gas, propane, or potential CO leaks.

Highly Rated Audible Alarm
Customers praise the loud 85-decibel alarm for effective alerting.
8.3

Good

Our Rating

9.7
Noise level

9.5
Easy installation

9.5
clearly written
10

Generic
Hydrogen Sulfide Gas Detector. Single Gas H2S Monitor,Sewer Gas Detector for Home.Wastewater Gas Detector. Portable Clip On H2S Gas Detector. Waterproof and ExplosionProof with Three Alarm Sound.
Main highlights

High Accuracy and Durability
Features a high-quality electrochemical sensor with less than 5% error.

Versatile Use Cases
Ideal for petroleum, chemical, refinery, sewer, and more.

Advanced Alarm System
Praised for adjustable audio, visual, and vibration alarms.
8.0

Good

Our Rating

10 Best sewer gas detectors of 2025

1

Klein Tools ET120 Gas Leak Detector, Combustible Gas Leak Tester with 18-Inch Gooseneck Has Range 50 - 10,000 ppm, Includes Pouch, Batteries

9.1

8.7

8.4

2

TopTes Guard-101 Gas Detector, 4 Gas Monitor for H2S, CO, LEL and O2, with Vibration, Visual and Audible Alarms, 14h Long Battery Life, Safety Explosion-Proof, for Work, Home - Orange

3

Gas Leak Detector & Natural Gas Detector: Portable Gas Sniffer to Locate Leaks of Multiple Combustible Gases Like Propane, Methane, LPG, LNG, Fuel, Sewer Gas with 12" Flexible Sensor Neck

9.7

9.5

9.5

4

PT520A Natural Gas Detector, Gas Leak Detector with 17-Inch Gooseneck, Locating The Source Like Propane, Methane, and Butane for Home and RV (Includes Battery x3) - Orange

9.7

9.7

9.3

5

Sewer Gas Leak Detector by Forensics | 0-10,000ppm & 1ppm Resolution | Water, Dust & Explosion Proof | Li-Ion Battery | Natural Gas, Methane, Ammonia, Hydrogen Sulfide

9.3

8.9

8.2

6

TOPTES Guard-633 H2S Detector, H2S Monitor Clip On with Precise Gas Sensor, 0.5S Fast Response, 7-Day Battery Life, Low Battery Alert, Adjustable Alarm Range, 3 Alarm Modes, Explosion-Proof Safety

7

TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange

9.7

9.5

9.5

8

Gas Leak Detector by Forensics | 10ft Drop Test Pass | Natural Gas, Alcohols, Methane, Combustibles, Acetone, Ethanol, Propane, Butane, Gasoline, Diesel, IPA, Toluene, LPG, LNG |

9.5

9.1

9.1

9

Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display

9.7

9.5

9.5

10

Hydrogen Sulfide Gas Detector. Single Gas H2S Monitor,Sewer Gas Detector for Home.Wastewater Gas Detector. Portable Clip On H2S Gas Detector. Waterproof and ExplosionProof with Three Alarm Sound.

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