Sensorcon Inspector Portable CO Detector with Live PPM Display, INS-CO-01

A live carbon monoxide reading you can take anywhere. The Sensorcon Inspector shows the actual CO level in parts per million, alarms at 35 ppm, and runs for 2+ years on one battery. It's our most affordable Inspector, for home, travel, work and everything in between.

Wherever Fuel Burns

Carbon monoxide comes from anything that burns fuel: furnaces and water heaters, cooking stoves, portable propane heaters, generators, fireplaces and vehicle exhaust. The Inspector is about the size of a deck of cards, waterproof and dustproof, and works from -4 to 122 °F, so it goes wherever you do.

One Cold Night Is All It Takes

In March 1999, the CDC reported two separate camping tragedies in Georgia. In the first, a propane stove brought into a zipped tent for warmth killed a man and three children. Two weeks later, a charcoal grill carried into a tent killed a father and his 7-year-old son. Everyone was asleep. Carbon monoxide has no smell, and its first symptoms feel like ordinary tiredness. A loud alarm and a live number are how you find out in time.

What You Get

• Live ppm readout: See the actual CO level, from 0 up to 1,999 ppm, not just a beep.
• Alarms at 35 and 200 ppm: An 80-85 dB buzzer and flashing LED.
• MAX recall: Check the highest level it saw while you were away or asleep.
• Fast: Responds in under 20 seconds.
• Tough: IP67 waterproof and dustproof, shock-resistant case.
• 2+ year battery on one CR123A, a steel clip and lanyard loop, and a 1-year warranty.

This model has no vibrating alarm. Want one you can feel? See the Inspector Industrial (INS-CO-02). Want a 2-year warranty? See the Inspector II (INS2-CO-01).

Who It's For

• Homeowners and renters with gas appliances or an attached garage
• Travelers staying in rentals and hotel rooms
• Campers and RV owners who cook or heat with propane
• Anyone who wants a live CO reading at the lowest price

What's in the Box

• Sensorcon Inspector CO detector, INS-CO-01
• Steel alligator clip with lanyard loop
• Instruction manual

Documents: Product brochure (PDF) | Instruction manual (PDF)

Service, Savings and Backup Units

• $49 calibration + new battery in 48 hours: Send it to our authorized Western/Central US service center for a certified-gas zero and span calibration, a new or spare battery, and a full alarm and function test. Free return shipping, and 24-hour service is available. Choose your authorized service center.
• $25 off a backup unit: Order a Western/Central US calibration and we'll email you a code for $25 off a new Sensorcon detector, so you're never without protection while yours is in for service. Only at COdetectors.com.
• Built to be rebuilt: When the sensor wears out, Sensorcon's $69 rebuild brings your Inspector back instead of sending it to a landfill.
• Volume pricing: Buy 5 or more Sensorcon detectors and your price per unit drops, with an even lower price at 10 or more. Mix any models. The discount applies automatically in your cart.

Frequently Asked Questions

Can I use it in a tent, camper or RV?

Yes. Set it near where you sleep, at about head height, and never bring a stove, grill or heater into a closed tent. In an RV, use it alongside the RV's built-in CO alarm, not instead of it.

Is the Standard model a personal safety monitor?

Sensorcon does not classify the Standard model as a personal safety device. If your job requires a classified personal monitor, choose an Industrial or Industrial Pro model.

Does this replace the CO alarms in my home?

No. The Inspector is a portable monitor. Keep a UL 2034 listed CO alarm on every level of your home and near sleeping areas, and use the Inspector to carry protection with you and to pinpoint where CO is coming from.

How do I keep it accurate?

Electrochemical sensors drift over time, so plan on regular calibration. Our $49 Western/Central US service includes certified-gas calibration and a new battery, back to you in 48 hours.

Compare the Legacy Inspector Models

Same sensor and live readout in every model. Here is what changes as you move up.

	YOU'RE VIEWING StandardINS-CO-01	IndustrialINS-CO-02	Industrial ProINS-CO-03
What It Does
Live CO reading in ppm	✓	✓	✓
Peak (MAX) reading recall	✓	✓	✓
Loud buzzer, 80–85 dB	✓	✓	✓
Flashing light alarm	✓	✓	✓
Vibrating alarm	—	✓	✓
Adjustable alarm levels, 5–500 ppm	—	—	✓
24-hour exposure average (TWA)	—	—	✓
Built to Last
Certified intrinsically safe	—	✓	✓
Water, dust and shock resistant	✓	✓	✓
Operating temperature	-4 to 122°F	-4 to 122°F	-4 to 122°F
Battery life	2+ years	2+ years	2+ years
Warranty	1 year	1 year	1 year
Assembled in the USA	✓	✓	✓
Service at COdetectors.com
$49 calibration + new battery, 48 hours	✓	✓	✓
$69 Sensorcon rebuild	✓	✓	✓
Best for	Home, RV, travel and everyday carry	Garages, workshops and loud places	Custom alarm levels and all-day exposure tracking

See calibration and rebuild details.