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Bring Peace of Mind.

Pack portable CO monitoring for your next hotel stay.

Shop Portable CO Detector

Invisible Risk.
Visible Protection.

Detect Carbon Monoxide early in RVs, tents, cabins for camping trips and life on the road.

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Professional-Grade Accuracy

Discover the Latest Innovation in Measuring & Monitoring

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Top Rated By Gauge-Getters

TOPTES
GASDOC
TESMEN
LASGOO

portable natural gas leak detector with AAA batteries

gas leak detector for methane propane and LPG leaks

gas sensor for combustible gas leak detection

TOPTES PT199 natural gas leak detector checking a kitchen stove connection

TOPTES PT199 gas leak detector with audible and visual alarm function

TOPTES PT199 portable gas detector stored in protective carrying pouch

PT199 Gas Leak Detector

$22.99

TOPTES PT520A natural gas leak detector with 17-inch flexible gooseneck

TOPTES PT520A gas detector with audible and visual alarm for gas leaks

TOPTES PT520A gas leak detector with high medium and low sensitivity modes

TOPTES PT520A natural gas detector checking a kitchen stove connection

Portable TOPTES PT520A gas sniffer with non-slip handheld design

TOPTES PT520A gas detector stored in protective carrying case

PT520A Gas Leak Detector

$39.99

17-inch flexible probe gas leak detector for hard-to-reach areas

PT520A+ Gas Leak Detector

$49.99

TOPTES PT520B+ rechargeable gas leak detector with 17-inch flexible probe

Gas leak detector with 11-color bar graph for combustible gas concentration

TOPTES PT520B+ gas leak detector with 75dB audible and visual alarm

Rechargeable TOPTES PT520B+ gas leak detector with Type-C charging port

TOPTES PT520B+ natural gas detector checking a kitchen stove connection

PT520B+ Gas Leak Detector

$79.99

GASDOC DS-399 portable carbon monoxide detector with digital CO display

GASDOC DS-399 carbon monoxide detector with audible and visual alarm

Portable CO detector with 168-hour battery life for travel and camping

Rechargeable carbon monoxide detector with Type-C charging cable

GASDOC DS-399 carbon monoxide detector kit with Type-C cable lanyard and manual

DS-399 CO Detector

$36.99

GASDOC DS-100 portable carbon monoxide detector with digital CO display

GASDOC DS-100 carbon monoxide detector with magnetic back for easy placement

Compact CO detector with lanyard for camping travel and outdoor safety

GASDOC DS-100 carbon monoxide detector with audible and visual alarm

Portable CO detector for RV travel and enclosed space safety

DS-100 CO Detector

$39.99

GASDOC DS-100PRO carbon monoxide and carbon dioxide detector with digital display

GASDOC DS-100PRO 4-in-1 portable CO and CO2 detector

GASDOC DS-100PRO detector with magnetic back for easy placement

Compact CO and CO2 detector with lanyard and carabiner for travel

Portable CO2 and carbon monoxide monitor for office classroom and indoor ventilation

GASDOC DS-100PRO portable CO and CO2 detector hanging inside a tent

GASDOC DS-100PRO detector with audible buzzer and visual safety alerts

DS-100 PRO CO & CO2 Detector

$49.99

GASDOC DS-X1 travel CO detector with digital carbon monoxide display

Portable CO detector with audible alarm and flashing visual alert

GASDOC DS-X1 carbon monoxide detector with built-in ambient camping light

GASDOC DS-X1 CO detector with magnetic mount for RV and car use

Rechargeable portable CO detector with 2100mAh battery for camping trips

DS-X1 CO Detector

$39.99

TESMEN TM-510 4000 counts smart digital multimeter for AC DC voltage, resistance, and continuity testing

TESMEN TM-510 smart multimeter resistance measurement function for DIY and electrical repair

TESMEN TM-510 non-contact voltage tester with visual and audible alarm for live wire detection

TESMEN TM-510 smart digital multimeter with test leads, batteries, storage bag, and user manual

TM-510 Digital Multimeter

$19.99

TM-510 Digital Multimeter

$14.99

TM-510 Digital Multimeter

$39.99

LASGOO LG-3D self-leveling 3x360 green laser level

LASGOO LG-3D laser level with two rechargeable lithium batteries

3x360 green laser level projecting horizontal and vertical lines across a room

Self-leveling green laser level with automatic leveling within four degrees

3x360 green laser level compatible with tripod mounting

LG-3D Laser Level

$139.99

LASGOO LG-3Dx laser level with built-in 4000mAh rechargeable battery

LASGOO LG-3Dx laser level with remote control for line adjustment

LASGOO LG-3Dx laser level with IP54 dustproof and splashproof design

3x360 green laser level with 1/4 inch tripod mounting thread

LG-3Dx Laser Level

$99.99

LASGOO LG-3Ds manual mode laser level for angled line projection

LASGOO LG-3Ds laser level with remote control for line and brightness adjustment

3x360 green laser level projecting full room horizontal and vertical lines

3x360 green laser level compatible with tripod mounting for construction work

Rechargeable green laser level with Type-C charging and power bank support

LG-3Ds Laser Level

$159.99

LG-3DM Laser Level

$99.99

Find Your Ideal Portable CO Detector by Scenario

RV & Road Trip

Real-time digital sensing for enclosed spaces.

Protect your family from hidden propane & heater leaks on the road. Compact, battery-powered portable carbon monoxide detectors designed for RVs, vans & campers.

Hotel & Travel

Pocket-sized peace of mind on the go.

Carbon monoxide is invisible and odorless. When you stay in a hotel, rental home, cabin, or Airbnb, a portable CO detector adds an extra layer of awareness in unfamiliar spaces.

Outdoor & Camping

Ultra-portable, long-battery-life monitors.

Stay safe while camping off-grid. Shop portable carbon monoxide detectors: 24/7 tent bedside monitors & precision camp stove leak finders.

Professional & Field

High-precision, instant PPM readings.

Professional-grade portable CO detectors for outdoor pros & inspectors. High-precision sensors for quick tent checks & heater leak inspection.

Quick Picks

AEGTEST AGT-2309 CO detector showing real-time carbon monoxide PPM reading

AEGTEST AGT-2309 Carbon Monoxide Detector

$36.99

GASDOC DS-399PRO 4-in-1 portable CO and CO2 detector

GASDOC DS-399PRO 4-in-1 Portable CO & CO2 Detector

$49.99

TOPTES CT-913 portable carbon monoxide detector with TFT color display and rechargeable design

TOPTES CT-913 Carbon Monoxide Detector

$74.99

TOPTES CT-580 Carbon Monoxide Detector

$65.99

TOPTES CT-300 Carbon Monoxide Detector

$45.99

TOPTES Guard-533 portable carbon monoxide detector with visual, audible, and vibration alarms

TopTes Guard-533 Carbon Monoxide Detector

$69.99

TOPTES Guard-566 portable carbon monoxide detector with digital CO display

TopTes Guard-566 Carbon Monoxide Detector

$79.99

AEGTEST AGT-3000 CO detector showing real-time carbon monoxide PPM reading

AEGTEST AGT-3000 Carbon Monoxide Detector

$34.99

AEGTEST AGT-2459 portable carbon monoxide detector with TFT color display

AEGTEST AGT-2459 Carbon Monoxide Detector (Yellow)

$36.99

AEGTEST AGT-2459 Carbon Monoxide Detector (Blue)

$36.99

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engineered for precision
built for professionals

At TOLHOM, we believe that every millimeter matters. We design and engineer next-generation measurement and electrical testing tools—from bi-directional lasers to advanced multimeters—that bring military-grade accuracy to your fingertips.

Whether you are a professional contractor layout out a major job site, an electrician ensuring safety, or a dedicated DIYer crafting your legacy, TOLHOM delivers the reliability and innovation you can trust on every project.

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Check In.
Bring Peace of Mind.

Invisible Risk.
Visible Protection.

Professional-Grade Accuracy

Top Rated By Gauge-Getters

Quick Picks

AEGTEST AGT-2309 Carbon Monoxide Detector

GASDOC DS-399PRO 4-in-1 Portable CO & CO2 Detector

TOPTES CT-913 Carbon Monoxide Detector

TOPTES CT-580 Carbon Monoxide Detector

TOPTES CT-300 Carbon Monoxide Detector

TopTes Guard-533 Carbon Monoxide Detector

TopTes Guard-566 Carbon Monoxide Detector

AEGTEST AGT-3000 Carbon Monoxide Detector

AEGTEST AGT-2459 Carbon Monoxide Detector (Yellow)

AEGTEST AGT-2459 Carbon Monoxide Detector (Blue)

shop by project

we’ve put more thought into your projects

Made for Your Everyday Adventures.

engineered for precision
built for professionals

Subscribe Today

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Country/region

Language

Check In.Bring Peace of Mind.

Professional-Grade Accuracy

Top Rated By Gauge-Getters

Quick Picks

AEGTEST AGT-2309 Carbon Monoxide Detector

GASDOC DS-399PRO 4-in-1 Portable CO & CO2 Detector

TOPTES CT-913 Carbon Monoxide Detector

TOPTES CT-580 Carbon Monoxide Detector

TOPTES CT-300 Carbon Monoxide Detector

TopTes Guard-533 Carbon Monoxide Detector

TopTes Guard-566 Carbon Monoxide Detector

AEGTEST AGT-3000 Carbon Monoxide Detector

AEGTEST AGT-2459 Carbon Monoxide Detector (Yellow)

AEGTEST AGT-2459 Carbon Monoxide Detector (Blue)

shop by project

we’ve put more thought into your projects

Made for Your Everyday Adventures.

engineered for precisionbuilt for professionals

Subscribe Today

Check In.
Bring Peace of Mind.

engineered for precision
built for professionals