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Internet #100651815

Model #DCO1001

Digital Carbon Monoxide Detector with Auto Zero Function

  • CO range: 0-1000 ppm
  • LCD dual digital display
  • Audio alarm can be set to sound at any of eight levels
  • See More Details

Frequently Bought Together


Product Overview

The battery-operated Digital Carbon Monoxide Detector with Auto Zero Function from General Tools features an electrochemical CO sensor with three points of auto calibration: 0, 100 and 500 ppm. The meter has a backlit LCD display and simultaneously exhibits dual readings of the current CO level and maximum level since the meter was powered on (updating every second). Other features include automatic calibration to 0 ppm in fresh air and an audio alarm that can be set to sound whenever the CO level exceeds any of eight selectable levels to indicate a dangerous CO concentration. It has a measuring range of 0-1000 ppm and comes complete with a soft case, a wrist strap, three AAA batteries and an instruction manual. The detector is ideal for HVAC contractors, plant operators, automotive experts and other professionals.
  • Carbon monoxide (CO) range: 0-1000 ppm
  • LCD dual digital display also shows ambient temperature
  • Adjustable CO warning level
  • Includes 3 AAA alkaline batteries, operation manual, wrist strap and carrying pouch
  • Bright backlight
  • Low battery indication
  • Battery life is 250 hours with the backlight off and 35 hours with the backlight on
  • California residents

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Batteries Included
Battery Power Type
Battery Size
Battery Type Required
Control Type
Display Type
Electrical Tools Features
Backlit,Data Hold
Number of Batteries Required
Product Weight (lb.)
Test Meter Type
Specialty Meter/Tester
Tools Product Type
Test Meter

Warranty / Certifications

Manufacturer Warranty
1 Year

Questions & Answers


What stores have this in stock for pickup in Northern Ohio, southern MI, Northern IN or Northern IL. I need 5 tomorrow

Asked by Dave May 24, 2020

The stores where this unit is sold will have availability and pricing information listed on the website when placing the order.

So if I were wanting to check the CO level in my vehicle I would just point and push the button? ...

Asked by lanamiasmomma April 25, 2017

How accurate is this meter?

Asked by Daniel October 17, 2015

It seems accurate for the amateur to identify further needs, which we figured should be drawing the attention of the professional. It will have limited use for what we have planned as well. Heavy use and particular problems may dictate the need for a heavier investment. This was reasonably priced and is valued even more highly by meeting our own expectations.

Customer Reviews

  • 3.9
    out of 11 reviews
  • 80% recommend this product
Filter by:
Showing 1-10 of 11 reviews
Product worked as advertised
Exactly what I was looking for. This device is quite accurate. I use the tester to check for exhaust leaks on diesel engines.
by GasSniffer
2 people found this helpful
4 Star Review
Rating provided by a verified purchaser
by HomeDepotCustomer
The detector was purchased for a particular need or project in mind. For this, it worked very we...
The detector was purchased for a particular need or project in mind. For this, it worked very well. I would also add that it arrived at the store well ahead of when was anticipated with the Holiday Season. It was simple enough for amateurs, which we were, and yet gave the professional results we desired. I was not sure of how much control we had of the alarm, which may have given an uncomfortable feeling that was not desired for our use but may have been just what an inspector might need. Overall it was great and came well-recommended. It is now once more recommended for value and effectiveness; this time by us.
by FreshCent
I don't trust it
I was using this for my home inspection business and it seemed to read 0 then when I would pick it up it would jump all over. 70-140 then 0. Didn't feel like I could put families health on the line with these results.
4 people found this helpful
Good instrument to check CO in home
We used an indoor rated gas heater in the basement during the cold weather and eventually a home CO monitor alarm triggered. This did not give the CO concentration but just that it had reached a dangerous level. We vented the house but was not sure that all the CO had been removed. We used this instrument to sweep the house and check that all CO had been removed.
by kidron
6 people found this helpful
Calibration time is unfortunate but otherwise solid hardware
Nothing much to say; works as expected. Test on vehicle exhaust if you don't trust that the device is operating correctly.
by zubzugs
2 people found this helpful
The product did not meet my needs
I need a monitor that will stay on for as long as I need it on a job, at least a couple hours. This one has an auto shutoff that shuts it down after 15 minutes, and does not save the values. A manufacturer's engineer confirmed it cannot be overridden.
by xxyy
2 people found this helpful
works fine
It seems to work fine. I don't have anything to compare it to to measure its accuracy. But it was easy to use and it is a good workable size.
by Birdhead
3 people found this helpful
This product is a great value.
These do no last as long as the more expensive models, because they cannot be re-calibrated. But they are so much less expensive that over a 10 year period they are a much better value.
by SweetLou
3 people found this helpful
Has all of the features I need
Very easy to set up. Instructions are well written. I tested it on several known values and was quite surprised to fin d out how accurate this product performed. It exceeded my expections.
by Ben
2 people found this helpful
Showing 1-10 of 11 reviews