Gas Detectors & Monitors

gas detectors & monitors — pre-owned

9,723listings

Browse 9,723 gas detectors & monitors — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

Honeywell BWC2-H 1-Gas Detector H2S 0-100PPM Light LCD Used
-30%
UsedBuy It NowBest Offer

Honeywell BWC2-H 1-Gas Detector H2S 0-100PPM Light LCD Used

Honeywell BWC2-H 1-Gas Detector H2S 0-100PPM Light LCD Used - we have 7 of these 2-year single gas detector for hydrogen sulfide that have been activated available with Free Shipping.

$29.79$42.56-30%

You save $12.77

Free ShippingAdrian, US
bocollin4
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99.9%Excellent· 10.1k
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MSA Altair 4X - Multi Gas Meter Gas Detector 4 Gas (LEL, O2, CO, H2S)
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UsedBuy It NowBest Offer

MSA Altair 4X - Multi Gas Meter Gas Detector 4 Gas (LEL, O2, CO, H2S)

The MSA Altair 4X is a gas detector designed to detect four different gases: LEL (Lower Explosive Limit), O2 (Oxygen), CO (Carbon Monoxide), and H2S (Hydrogen Sulfide). Manufactured by MSA, a trusted brand in the industry, this unit is made in the United States and is ideal for use in various industrial applications. With its advanced technology and reliable performance, the MSA Altair 4X is a valuable tool for ensuring safety and detecting potential gas leaks in the workplace.

$239.67
+$7.56Eden, US
dwillie0500TOP
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99.4%Excellent· 2.1k
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SKC AIRCHEK 2000 AIR SAMPLER PUMP MODEL:210-2002 Working
UsedBuy It Now

SKC AIRCHEK 2000 AIR SAMPLER PUMP MODEL:210-2002 Working

Comes with everything pictured in the listing . Charger included. The SKC AIRCHEK 2000 Air Sampler Pump is a reliable and efficient tool for detecting and measuring air quality. With its brand reputation of SKC and model number AIRCHEK 2000, this pump is designed to provide accurate and consistent results. Perfect for industrial and business applications, this model ensures optimal performance and precision in testing and measurement. Ideal for professionals in the field of gas detectors and monitors, this air sampler pump is a valuable asset for maintaining and improving air quality in various environments.

$999.99
+$30.00Warner Robins, US
elithom9270
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100.0%Excellent· 120
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RKI Calibration Gas Cylinder 81-0154RK-04 CO H2S CH4 O2 Tank Only MADE IN USA
-20%
UsedBuy It NowBest Offer

RKI Calibration Gas Cylinder 81-0154RK-04 CO H2S CH4 O2 Tank Only MADE IN USA

$426.67$533.34-20%

You save $106.67

Free ShippingSacramento, US
radience
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99.8%Excellent· 614
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Ecosense EQ100 EcoQube, WiFi connected Digital Radon Detector,Remote Data access
Seller refurbishedBuy It Now

Ecosense EQ100 EcoQube, WiFi connected Digital Radon Detector,Remote Data access

EcoQube’s radon detection technology provides monitoring with radon results displayed straight to your smartphone using built-in Wi-Fi connectivity.

$85.00
See listingTustin, US
ecosense-2180
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99.7%Excellent· 358
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Ecosense RD200 RadonEye, Home Radon Detector
Seller refurbishedBuy It Now

Ecosense RD200 RadonEye, Home Radon Detector

The RadonEye RD200 is a fast, accurate, and reliable smart radon detector. RadonEye RD200 is the optimal choice for homes, offices, and buildings. RadonEye RD200 is the device reading radon gas levels 30 times per hour (30 cph/pCi/L) with unmatched accuracy. The RadonEye RD200 uses an ion chamber and a highly accurate detection circuit designed with our exclusive technology. First reliable test results are produced within just 1 hour after plug and play setup. The radon level readings are displayed using dynamic charts, insightful graphs, and data logging via an intuitive app, along with a Bluetooth connected alert setting.

$83.99
See listingTustin, US
ecosense-2180
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99.7%Excellent· 358
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Heath Consultants Odorator  *Excellent Condition* HealthTech Ships Fast
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UsedBuy It Now

Heath Consultants Odorator *Excellent Condition* HealthTech Ships Fast

This is for a Heath Consultants Odorator HealthTech. Battery Box is Super clean-- No leaky battery evidence. NO Flaws or Issues to point out. Excellent Condition Overall Condition. NO Rattling or Loose pieces.

$925.00
Free ShippingSpring, US
surplus_savantTOP
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100.0%Excellent· 9.7k
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MSA Altair 5X Portable Multi-Gas No Charger. Needs Calibrated
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UsedBuy It NowBest Offer

MSA Altair 5X Portable Multi-Gas No Charger. Needs Calibrated

Sold as-is.

$400.00$500.00-20%

You save $100.00

Free ShippingKW
akram_2020TOP
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100.0%Excellent· 1.1k
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Sensit Gold Combustible Gas Leak Detector With Case Bundle Read
-13%
UsedBuy It Now

Sensit Gold Combustible Gas Leak Detector With Case Bundle Read

In good working condition. Case shows signs of wear. The SENSIT Gold Combustible Gas Leak Detector is a high-quality tool designed for detecting combustible gases in industrial and commercial settings. With the trusted SENSIT brand name, you can rely on its accuracy and durability.

$177.99$204.99-13%

You save $27.00

Free ShippingCass City, US
8ten1944
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99.8%Excellent· 347.1k
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Honeywell BW Technologies Gas Alert Microclip XL Calibrated Warranty
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UsedBuy It NowBest Offer

Honeywell BW Technologies Gas Alert Microclip XL Calibrated Warranty

Installed Sensors: The MicroClip XL boasts an array of sensors for concurrent detection of various gases - Hydrogen Sulfide (H2S): Signals the existence of poisonous H2S gas. - Oxygen (O2): Crucial for verifying levels of breathable air.

$375.00
Free ShippingWichita, US
mosellTOP
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100.0%Excellent· 2.4k
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SENSIT Gold G2 Combustible Gas Leak Detector 911-00000-52/55 - Tested Working
UsedBuy It NowBest Offer

SENSIT Gold G2 Combustible Gas Leak Detector 911-00000-52/55 - Tested Working

INCLUDES: Gas leak detector only. || DOES NOT INCLUDE: Batteries. This Policy explains what Personal Data we collect from you, why we collect and process your personal data, when and with whom your personal data is shared, and your rights with respect to your Personal Data.

$349.98
Free ShippingUS
epcsales
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99.9%Excellent· 133.9k
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Honeywell BW REG-0.375 LPM Regulator, good for bw 4/1 mix, msa, rae
UsedBuy It Now

Honeywell BW REG-0.375 LPM Regulator, good for bw 4/1 mix, msa, rae

NEW 0.375 LPM valve1000 lpm display, male threads for 34,58,116 Liter aluminum cylinders. Also good for 103 Liter steel cylinder which takes male thread. slightly lower flow rate than 0.5 LPM obviously, Have not seen any problems using it instead of a 0.5 lpm.

$55.00
+$7.00Cleveland, US
calibrationservices
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100.0%Excellent· 1.6k
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USED - RAE Systems Mini RAE PLUS PGM-76IS Photoionization Gas Detector
UsedBuy It Now

USED - RAE Systems Mini RAE PLUS PGM-76IS Photoionization Gas Detector

—USED - RAE Systems Mini RAE PLUS PGM-76IS Photoionization Gas Detector —pictures are part of description showing what is included only and overall condition …battery needs to be replaced, works off power adapter —- shipped ups, FedEx or usps with no returns —- leave positive feedback and I will do the same

$195.95
+$19.95North Olmsted, US
ctownscott
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100.0%Excellent· 465
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MSA ALTAIR 4X Mining Multigas Detector - Lot of 2 - Untested
For parts or not workingBuy It NowBest Offer

MSA ALTAIR 4X Mining Multigas Detector - Lot of 2 - Untested

MSA ALTAIR 4X Mining Multigas Detector. Lot of 2 - Untested. We never used them ourselves, and were unable to test them. They might be working properly, or t hey might be defective.

$249.99
Free ShippingHarvard, US
prodige_processing_inc
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99.9%Excellent· 9.7k
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Testo 310 Flue Gas Combustion Analyzer
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UsedBuy It Now

Testo 310 Flue Gas Combustion Analyzer

Temperature (flue & ambient). Combustion efficiency & excess air. Undiluted CO (CO air free). We do our best to process as quickly as possible. NO APO, FPO, DPO, Or US territories and protectorates.

$279.99$350.00-20%

You save $70.01

Free ShippingMinneapolis, US
cashinwhiTOP
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99.6%Excellent· 49.0k
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SENSIT Gold G2 Combustible Gas Leak Detector 911-00000-52/55 - * Case Only
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UsedBuy It NowBest Offer

SENSIT Gold G2 Combustible Gas Leak Detector 911-00000-52/55 - * Case Only

INCLUDES: Gas detector case only. This Policy explains what Personal Data we collect from you, why we collect and process your personal data, when and with whom your personal data is shared, and your rights with respect to your Personal Data.

$29.98
Free ShippingSaint Charles, US
epcsalesTOP
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99.9%Excellent· 133.9k
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CalGaz 715 Calibration Gas Fixed Flow Regulator 0.5 LPM
UsedBuy It Now

CalGaz 715 Calibration Gas Fixed Flow Regulator 0.5 LPM

Mixed of lightly used and new units. All pulled from gas monitor kits.

$59.95
Free ShippingSouth Bend, US
greentek
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99.7%Excellent· 1.7k
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MSA 10047469 Wand Assembly Universal Pump Probe (Quantity 1)
UsedBuy It Now

MSA 10047469 Wand Assembly Universal Pump Probe (Quantity 1)

Listing is for 1 wand… several available. MSA 10047469 Wand Assembly Universal Pump Probe

$30.00
Free ShippingOxford, US
dogtownshoppe
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99.9%Excellent· 3.2k
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MSA Altair 5X Gas Detector - LEL, O2, CO, H2S W/ Charger  Used
UsedBuy It Now

MSA Altair 5X Gas Detector - LEL, O2, CO, H2S W/ Charger Used

MSA Altair 5X Gas Detector - LEL, O2, CO, H2S W/ Charger Used working conditions please check the pictures thanks

$599.99
Free ShippingJurupa Valley, US
masan-2320
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99.4%Excellent· 1.3k
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VINTAGE JW JOHNSON WILLIAMS SNIFFER COMBUSTIBLE GAS INDICATOR MODEL G WITH CASE
UsedBuy It NowBest Offer

VINTAGE JW JOHNSON WILLIAMS SNIFFER COMBUSTIBLE GAS INDICATOR MODEL G WITH CASE

It shows normal signs of previous use, includingblemishes, sticker residue, scratches, and scuffs. If you use aP.O. Thesale will not be honored .

$29.99
Free ShippingManteca, US
hellbentrider
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100.0%Excellent· 262
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Drager PAC 3500 Single Gas Detector Meter  with New 123 Battery -  Used Working
UsedBuy It Now

Drager PAC 3500 Single Gas Detector Meter with New 123 Battery - Used Working

Full disclosure - I have no idea what this is or what it does. It was in a tool box from an estate sale. It powers on with a battery then cycles through a bunch of number screens then rests with 00 on the display.

$54.99
See listingRed Oak, US
wenchal
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100.0%Excellent· 2.1k
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MSA Altair 4X Gas Detector FOR PARTS
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For parts or not workingBuy It Now

MSA Altair 4X Gas Detector FOR PARTS

But I have no way of testing it.

$250.00
+$14.95Sioux Falls, US
dakota20002TOP
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100.0%Excellent· 2.4k
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MSA ESPII Voice Amplifying Communication System Advantage& Melilennium Gas Masks
UsedBuy It Now

MSA ESPII Voice Amplifying Communication System Advantage& Melilennium Gas Masks

Used- See Photos MSA ESPII 10026265

$165.00
Free ShippingWoodland, US
bamsurplus
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99.9%Excellent· 4.0k
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Itron FC300 Handheld Meter Reader Scanner SRead w/ Dock Base & Battery Charger
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UsedBuy It NowBest Offer

Itron FC300 Handheld Meter Reader Scanner SRead w/ Dock Base & Battery Charger

Itron FC300 Handheld Meter Reader Scanner w/ Dock Base & Battery Charger

$99.75
+$12.00Gillette, US
kenns_dealzTOP
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99.5%Excellent· 872
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MINI RAE PLUS PROFESSIONAL PID SOIL CONTAMINATION ANALYZER
UsedBuy It NowBest Offer

MINI RAE PLUS PROFESSIONAL PID SOIL CONTAMINATION ANALYZER

The MINI RAE PLUS Professional PID Soil Contamination Analyzer by RAE Systems is a compact gas detector designed for measuring soil contamination levels. With its advanced PID technology, this analyzer is able to accurately detect a wide range of gases, making it a reliable tool for environmental monitoring and quality control in various industrial settings. Its user-friendly design and professional-grade capabilities make it a valuable asset for ensuring soil health and safety in both commercial and residential projects.

$249.00
See listingPetaluma, US
7071968fun
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100.0%Excellent· 2.3k
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RKI GX-2009 PORTABLE MULTI GAS DETECTOR WITH CHARGER
-7%
UsedBuy It NowBest Offer

RKI GX-2009 PORTABLE MULTI GAS DETECTOR WITH CHARGER

The RKI GX-2009 Portable Multi Gas Detector with Charger is a reliable and efficient tool for detecting various gases in industrial and commercial settings. Made by RKI in China, this model offers accurate and fast detection capabilities. Its portable design allows for easy transportation and use in different locations. With its built-in charger, the GX-2009 ensures that you always have a reliable gas detector on hand for any situation requiring gas monitoring.

$110.00$118.75-7%

You save $8.75

Free ShippingMesa, US
tyznmtn
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100.0%Excellent· 2.1k
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MSA ALTAIR 4X Mining Multigas Detector - Lot of 2 - Untested
For parts or not workingBuy It NowBest Offer

MSA ALTAIR 4X Mining Multigas Detector - Lot of 2 - Untested

MSA ALTAIR 4X Mining Multigas Detector. Lot of 2 - Untested. We never used them ourselves, and were unable to test them. They might be working properly, or t hey might be defective.

$249.99
Free ShippingHarvard, US
prodige_processing_inc
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99.9%Excellent· 9.7k
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Industrial Scientific IBrid MX6 Multi Gas Detector With Pump Battery & Cradle
UsedBuy It NowBest Offer

Industrial Scientific IBrid MX6 Multi Gas Detector With Pump Battery & Cradle

Device removed from government service in working condition. 2 batteries included. 1 has some corrosion in the battery compartment (it was cleaned a bit and looks to be just surface level). That battery still works fine. Everything pictured is included. Battery will need to be charged before use. Some pieces may be old and no longer usable (tank looks to be expired), but they are included nonetheless. The rubber on the detector is a little worn and not perfect. Any property stickers are old and no longer valid.

$489.99
Free ShippingPort Saint Lucie, US
product2people
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100.0%Excellent· 3.6k
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RAE Systems ppbRAE 3000 Volatile Organic Compound Monitor  PGM7340
UsedBuy It Now

RAE Systems ppbRAE 3000 Volatile Organic Compound Monitor PGM7340

The RAE Systems ppbRAE 3000 Volatile Organic Compound Monitor PGM7340 is a gas detector designed for monitoring levels of volatile organic compounds (VOCs) in the air. Produced by RAE Systems, this monitor is specifically engineered to accurately measure and display ppm levels of VOCs, ensuring a safe and healthy environment. With its high-quality and reliable technology, this gas detector is a valuable tool for businesses and industrial settings looking to detect and control VOC emissions.

$797.00
Free ShippingDallas, US
electronicsandmore4u
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99.7%Excellent· 1.3k
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Msa Toxgard-II Gas Monit. A-TOX-14-SM-0-2-1-B-0-0-0-1-0-0-0-C 40w (11.5.2)
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Seller refurbishedBuy It NowBest Offer

Msa Toxgard-II Gas Monit. A-TOX-14-SM-0-2-1-B-0-0-0-1-0-0-0-C 40w (11.5.2)

Msa Toxgard-II Gas Monitor A-TOX-14-SM-0-. 0-1-0-0-0 -C 40W R.02 0-25%. MACT # 2301.

$539.10$599.00-10%

You save $59.90

See listingDuncan, US
jbpalmettoTOP
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99.9%Excellent· 1.5k
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Honeywell BW MicroDock II System with 4 Dock Modules | Gas Detector Calibration
UsedBuy It NowBest Offer

Honeywell BW MicroDock II System with 4 Dock Modules | Gas Detector Calibration

⚠️ Shipping Notice: This item is valued at $750 or more and will be shipped with signature required upon delivery. This ensures the package reaches the correct recipient and protects both the buyer and the seller. Tracking is included, and the signature must be provided by the recipient (or an adult, if applicable). Thank you for your understanding. BW Honeywell MicroDock II Complete Gas Detection & Calibration System – Full Kit This listing is for a complete BW Honeywell industrial gas detection and calibration system, ideal for safety professionals, confined space work, oil & gas, construction, and industrial environments.

$760.00
See listingHouston, US
da_426707
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100.0%Excellent· 125
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Lot Of 2 BW Gas Alert Micro5 Pid Multi Gas Monitor Detector Meters Pump Alarm
For parts or not workingBuy It NowBest Offer

Lot Of 2 BW Gas Alert Micro5 Pid Multi Gas Monitor Detector Meters Pump Alarm

Lot of 2 BW gas alert micro 5 pid.. As pictured. Untested. Selling as is. Selling as non working. Selling for parts only. As pictured. Untested. These are all untested. Sensors left intact.

$196.00
Free ShippingLouisville, US
mysterious*baggage
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99.5%Excellent· 4.5k
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Lot of 10 Honeywell RAE Systems QRAE 3 PGM-2500 Monitors - Parts - Not Tested
For parts or not workingBuy It NowBest Offer

Lot of 10 Honeywell RAE Systems QRAE 3 PGM-2500 Monitors - Parts - Not Tested

10 - QRAE 3 PGM-2500 Multi-Gas Monitors. (See photos). Not Tested. May not be functional. All 10 are sold as one combined lot.

$400.00
+$20.00Dickson, US
brewbuys
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99.5%Excellent· 665
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Lot of 10 Blackline Safety G7C Multi gas detector Untested Parts or Repair AS IS
For parts or not workingBuy It NowBest Offer

Lot of 10 Blackline Safety G7C Multi gas detector Untested Parts or Repair AS IS

Condition: for Parts. No accessories included.

$39.00
+$20.00Rowland Heights, US
greenstore-1
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99.2%Excellent· 1.3k
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MSA Altair 4XR Portable Multigas Detector LEL+O2+CO+H2S Bluetooth Monitor✅
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UsedBuy It NowBest Offer

MSA Altair 4XR Portable Multigas Detector LEL+O2+CO+H2S Bluetooth Monitor✅

MSA ALTAIR 4XR PORTABLE MULTIGAS DETECTOR ----------------------------------------- Reliable 4-Gas monitoring for LEL, O2, CO, and H2S. KEY FEATURES: 🔹 BLUETOOTH CONNECTIVITY: Real-time gas readings and instant alerts via the ALTAIR Connect app. 🔹 XCELL SENSORS: Industry-leading response times (2x faster than average). 🔹 RUGGED BUILD: IP68 rating, waterproof/dustproof, and 25-ft drop tested. 🔹 COMPLIANCE: Ideal for industrial safety, OSHA requirements, and confined space entry. INCLUDES: ✅ MSA Altair 4XR Unit (LEL, O2, CO, H2S) ✅ Charging Cradle & Power Cable ✅ Calibration Cap & Tubing Condition: Fully functional and ready for professional use. 🚀 FAST & SECURE SHIPPING! 👉 TAP FOR FULL DESCRIPTION, CALIBRATION DETAILS, AND HIGH-RESOLUTION PHOTOS.

$225.00
Free ShippingBridgeport, US
goldtwoTOP
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99.6%Excellent· 27.0k
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MSA Altair 4XR 4-Gas Detector – LEL O₂ CO H₂S | Calibrated + Warranty
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UsedBuy It NowBest Offer

MSA Altair 4XR 4-Gas Detector – LEL O₂ CO H₂S | Calibrated + Warranty

✔️Firmware Updated | Clean Display | Responsive Interface.

$450.00
Free ShippingWichita, US
mosellTOP
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100.0%Excellent· 2.4k
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Drager Pac III 4530010 Permissible Gas Monitor Detector W/ CL2 Sensor
UsedBuy It NowBest Offer

Drager Pac III 4530010 Permissible Gas Monitor Detector W/ CL2 Sensor

Model: 4530010. Classification: Used good condition key functions working.

$19.95
+$5.95Abington, US
llumag
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99.8%Excellent· 12.7k
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Honeywell BW Technologies Gas Alert Microclip XL Calibrated Warranty
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UsedBuy It NowBest Offer

Honeywell BW Technologies Gas Alert Microclip XL Calibrated Warranty

This Honeywell BW TechnologiesGasAlert MicroClip XL (MCXL) has been professionally inspected, tested, and verified to operate like new. 1 GasAlert MicroClip XL unit. Bright LCD with clear gas readings.

$325.00
Free ShippingWichita, US
mosellTOP
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100.0%Excellent· 2.4k
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Fieldpiece SCM4 Carbon Monoxide Detector
UsedBuy It Now

Fieldpiece SCM4 Carbon Monoxide Detector

Fieldpiece SCM4 Carbon Monoxide Detector. Condition is Used. Shipped with USPS Ground Advantage.

$140.00
See listingHeber, US
belcars_deals
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99.1%Excellent· 9.2k
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TESTO 335 Fuel Gas Analyser - Untested As Is
UsedBuy It Now

TESTO 335 Fuel Gas Analyser - Untested As Is

This item is UNTESTED. It is being sold strictly as-is. What you see is exactly what you will receive.

$99.95
Free ShippingLodi, US
valley_enterprise
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99.1%Excellent· 4.7k
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