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
$99.99
Price: $99.99
(as of Feb 10, 2026 22:21:46 UTC – Details)
Product description
What certifications does the Guard-101 have?
Guard-101 is certified with a Calibration Certificate, UL2056, and FCC certification.
Does the Guard-101 require calibration, and how often should it be calibrated?
Yes, calibration is required. To ensure accurate detection, it is recommended to calibrate once a year, as the gas sensor may wear out depending on the environment and usage frequency.
How many alarm records can the Guard-101 store? Can the data be exported?
Guard-101 can store up to 2,000 alarm records. Data export is not supported.
Quick Detection, Safety First: Guard-101 4 gas monitor multi gas detector is designed for rapid detection of 4 types of gases (H2S, CO, LEL, O2). The battery life lasts up to 14 hours, ensuring long-term monitoring of gas concentrations
User-Friendly Design: Guard-101 gas detector is made of high-strength ABS engineering plastic, which is waterproof, dustproof, and explosion-proof. Its back clip design makes it easy to carry in the workplace. Password protection prevents accidental operation, with an initial password of “69”
Triple Alarm, Data Storage: Guard-101 4 gas monitor multi gas detector utilizes three alarm modes: LED light, vibration, and sound. It responds within 0.5 seconds and continues to alarm until the gas concentration returns to normal. The Guard-101 also features an alarm record storage function, allowing you to check monitoring data at any time
Professional Certification: The Guard-101 4 Gas Monitor has passed rigorous safety tests conducted by internationally authorized institutions. It holds valid certification and meets industry standards, ensuring high reliability and accuracy in various environments
What You Get: Your purchase includes a Guard-101 gas detector, a packaging box, a user manual, a charging cable, and a standard gas hood. This device is suitable for a wide range of applications, including industrial manufacturing, mining, agriculture, emergency rescue, and home use
13 reviews for 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
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Anon –
Accurate, great safety product, recommended for heaters for in enclosures
Seems pretty accurate always nice to have when you’re using the propane heater in a tent or enclosed space being able to tell your oxygen levels and carbon monoxide gives you a little bit more of reassurance that you’re not gonna just wake up dead
Leslie E. –
Saved Granmmie’s life!
I kept smelling gas at my Grandmother’s house. I could smell it but Grammie couldnt. I called the gas company because this gas meter kept alarming. The gas company’s detector wasn’t picking up the gas and the gas technician couldn’t smell it either. I kept insisting there was gas. This gas meter helped me convince the gas technician to keep searching for the leak. He finally found it and Grammie’s house didnt blow up. Very thankful!
Shopping Idaho –
Low cost monitor but actually not too bad
Part of my job is training new individuals for confined space. New individuals are often unsure of what they are doing. I wanted an air monitor that would work but also be expendible if the trainee would drop it or it would get misplaced in traveling to and from locations.I compared this unit to my name brand ones costing 5 to 10 times more expensive. Its actually significantly more accurate than i would have expected. I would actually reccomend this unit. Its a great value for a first air monitor. It was very easy to used and battery last forever.
Uriel –
Util
Buen producto en relación con el costo
william araque –
Shaving your life
If you work in the oil fuels or any part of Texas, where there’s oil and natural gas this will save your life in more ways that you’ll ever know
Amazon Customer –
Stopped working after 1 use.
I bought two of these. I only used it once or twice and now they O2 Alarm is going off like crazy. In order to get it to turn off, I have to adjust the zero by 10%. This isn’t right. If I shoot CO has to it, it doesn’t respond. It doesn’t seem to have any type of pup that sucks air in. I tried researching what could be causing it but no luck. Pretty disappointed.
Anna garcia –
10/10
It works perfectly and the battery lasts a long time
Joe Clifford –
Safety shouldn’t break the bank
Works perfect at a great price
Mark W. –
Use this in mines, caves, tunnels etc. Good piece of kit. Feel safe with this
Rene –
Bewertung:Der TopTes Guard-101 Gasmelder macht einen sehr hochwertigen und zuverlässigen Eindruck. Besonders überzeugend ist die gleichzeitige Überwachung von H2S, CO, brennbaren Gasen (LEL) und Sauerstoff (O₂) – das gibt ein hohes Sicherheitsgefühl, egal ob im beruflichen Einsatz oder privat.Die Alarmfunktionen sind hervorragend umgesetzt: Ton, Licht und Vibration sind klar wahrnehmbar und lassen keine Zweifel, wenn etwas nicht stimmt. Gerade in lauten Umgebungen ist die Vibrationsfunktion ein großes Plus. Die Messwerte werden gut ablesbar angezeigt und reagieren schnell.Auch die Akkulaufzeit von rund 14 Stunden ist praxisnah und ausreichend für lange Arbeitstage. Das robuste, explosionsgeschützte Gehäuse wirkt stabil und langlebig, die auffällige orange Farbe sorgt dafür, dass man das Gerät nicht so leicht verlegt.Fazit:Ein professioneller, zuverlässiger und einfach zu bedienender Gasmelder mit umfangreichen Sicherheitsfunktionen. Sehr gutes Preis-Leistungs-Verhältnis und klare Kaufempfehlung 👍
Flo –
Voilà plusieurs fois que je l’utilise en exploration sousterraine de carrières et mines abandonnées. Il semble précis et très pratique et n’a rien a envier à des alternatives plus “pro” et onéreuses que j’ai pu également tester. Cependant hormis pour l’O2, je n’ai pas encore pu tester les autres capteurs.
Belotti Costruzioni Srl Bergamo –
Ottimo rilevatore, utilizzo in cantieri spazi confinati e va bene
Alfonso León Tlatelpa –
solocitamos la certificacion de los detectores y no la pueden dar. Tuvimos que hacer esta certificacion con un gtercero, con muchas limitantes, porque no se puede ingresar al sistema del equipo, dique por “Porteccion”