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General Tools

Model # PNG2000A

Internet # 100651812

Pen Style Natural Gas Detector

This item has been discontinued.
The Home Depot no longer carries this specific product.

$32.98 /each

  • Designed to detect gas leaks in pipes, valves and fittings
  • Natural diffusion sensor
  • Audible and visual alarm




Model # PNG2000A

Internet # 100651812

Store SO SKU # 781975

The Pen Style Natural Gas Detector from General Tools detects natural gas, compressed natural gas, methane (CH4), propane, butane, liquid natural gas (LNG) and liquid petroleum gas (LPG) to locate leaks in pipes, valves and fittings. This essential tool is packed with features such as audible and visible annunciation and a natural diffusion sensor. The high sensitivity of the unit and affordability make it ideal for the technician, do-it-yourselfer or homeowner.

California residents: see  Proposition 65 information

  • LEDs: green, on; yellow, 20% +/- 5% LEL; red, 50% +/- 10% LEL (lower explosive limit)
  • Sensitivity: LPG: 2000 ppm; LNG 4000 ppm
  • Detects LNG, LPG, methane (CH4), butane and other flammable gases
  • High sensitivity
  • Low power consumption
  • Microprocessor controller
  • Auto zero calibration
  • Reliable performance
  • Simple operation
  • Audible and visual alarm

Info & Guides

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Coverage area (sq. ft) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Alarm Type 
Natural Gas 
Alarm/Detector Features 
Adjustable Sensitivity 
Calibration (% of LEL) 
Connector/Contact Type 
Fixed or portable 
Gas(es) detected 
Minimum detection (ppm) 
Power Source 
Response time (sec.) 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 


Rated 3.9 out of 5 by 27 reviewers.
Rated 1.0 out of 5.0 by Piece of Junk Do not buy this product, it's useless. If I could give it no stars, I would, but minimum stars is 1. But it's really no stars. What did I expect for 40 bucks? A good gas detector costs hundreds of dollars, not 40 dollars. I have a slight natural gas leak in my place, I can smell it, but not sure which connection it's coming out of. Soap detected one leak at union fitting, I tightened it up good, no more bubbles, but still, I can smell slight whiff of natural gas from time to time.. I thought that this thing would work, but it didn't detect anything. So I thought I'd do a little test. I fired up my natural gas stove burners and blew out the flame. (You have abut 5 seconds before the stove determines that the flame is out and re-ignites.) Now pure natural gas is spewing out of the burners. Held the thing right in the gas stream and it did not detect anything. I can hear the natural gas flowing, I can smell the natural gas with my own nose 3 feet away, but this tool (so called) doesn't sound the alarm. I repeated with an unlit plumbing torch. (So now propane). This time, it did detect it, but the amount of gas required to sound the alarm was huge. Slight amount of gas, (you can smell it, and a flame reveals that there is a small amount of propane flowing out) and it does not detect anything. So don't waste your money and time on this thing. Especially if you are trying to find a slight leak. It's useless. I don't need an instrument to detect a major leak, I can do that myself with my own nose. I need it to detect very slight leaks and this thing does not do that. Not one bit. January 28, 2015
Rated 5.0 out of 5.0 by It works like promised I smelled gas in my house, but could not tell where it was coming from. Tried the old soap in a squirt bottle and still could not find the leak. I went on line to see if I could find something that would help and came across the General Company's "Gas Seeker". After reading mostly good reviews on the product, I thought I would give it a try.Simple and easy to use. Just push the button, let it warm up and simply pass it over your gas pipes and it will beep and show two different lights if it detects any gas. One light for a small slow leak and another for a larger leak. I found the first leak right away, so I kept checking more gas connections and found four more leaks!. It was money well spent and the price reasonable. March 19, 2013
Rated 3.0 out of 5.0 by able to detect large leaks only This detector is easy to use and detects large leaks. For example, if you turn on a kitchen gas burner and don't light it, you can hold the detector over the gas flow and it will detect the gas. Of course you can also easily smell the gas since the gas company adds an odor. I was trying to find a small leak due to a loose pipe fitting. I could get a whiff of the smell of the gas but couldn't be sure which joint was leaking. Unfortunately, my nose is more sensitive than this detector so it didn't help me. Ultimately, a more expensive detector was able to detect this small leak. So this product is useful only if you are seeking leaks of a certain magnitude. Since natural gas in my community has the odor added to it, I didn't find this detector helpful and I returned it. July 1, 2012
Rated 5.0 out of 5.0 by Lives up to its claims! I had a leak at my sons townhome in the gas line feeding the furnace. Even the highly paid house inspector with a high end gas "sniffer" said that the smell was due to the furnace belching upon startup and the furnace room should have better venting. I didn't believe him and purchased this unit and, behold, found the leak. After two hours of draining water heater and moving some plumbing to get to the leak, problem solved! The house inspector, if he had done his job, should have recommended this be fixed PROIR to us purchacing this townhome. April 10, 2012
Rated 5.0 out of 5.0 by Pen Style Natural Gas Detector If you fall into the category of amateur home-repair person, or just want something that is better than soapy-water, this is the device to have. This no-frills gas detector will provide you an ease of mind, as it does exactly what it is supposed to do. After having the detector delivered, I immediately went to my shop and tested the sensitivity of the product. It has two different levels that are displayed through a yellow and red LED light, along with two- different sounds that correspond to the light color. If you are looking for something that will provide the exact amount of explosive gas in the air – this is not the product. Save your $50 dollars and put it toward one of the $200 - $300 testers. However, if you want something to have in your toolbox that will give you peace of mind – this is for you. And besides – it is made in the good ol’ USA! January 22, 2009
Rated 5.0 out of 5.0 by pen style natural gas detector We just converted from propane to natural gas and were smelling a 'gas' odor so we ordered this pen style gas detector. It works great, we detected a small leak and were able to fix it without calling for help. It is good to have around for any future problems. We are very pleased with the quality. December 11, 2010
Rated 5.0 out of 5.0 by Great little detector We had a small leak in a natural gas fireplace. We had a repairman investigate and he was unable to find it. I tried to detect a leak with the detergent/bubble test method and was unable to find it. With this little natural gas detector, I found the problem in a matter of minutes. It is easy to use but sensitive enough to find a very small leak. Great product! It paid for itself it's first use! March 6, 2010
Rated 4.0 out of 5.0 by Inexpensive and Useful Tool I had a very small natural gas leak in my basement above the suspended ceiling. I could smell the gas, but the use of a liquid detector fluid was of no help. The chemical the gas company puts into natural gas can be detected very easily by your nose, way before any explosion can take place, so the leak must have been very small. I started looking for some type of electronic gas detector and was expecting to pay a hundred dollars or more. I then came across the General Tools Gas Detector. I ordered it and used the detector to check each pipe joint, and soon discovered a very, very small leak coming from one side of a joint. Repaired the joint and now no leak. The only negative is that since this is a passive unit (no sucking of air into the unit), it is a little slow in detection, but for the cost it was well worth it since non-passive units cost hundreds of dollars. Will use on all my gas line repairs so there will be no surprises. February 19, 2011
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