Sensorcon Inspector Industrial Pro CO Detector, Adjustable Alarms, INS-CO-03

Set your own alarm levels and see your all-day exposure. The Sensorcon Inspector Industrial Pro has everything in the Industrial model, plus alarms you can set as low as 5 ppm and a 24-hour exposure average, for long workdays or anywhere you want an earlier warning.

For Long Days Around Engines and Equipment

Vehicles, forklifts, generators, pressure washers and heaters can push CO up slowly over a whole day. A single reading doesn't tell you much. The Industrial Pro shows the live level, alarms early at the level you choose, and keeps a time-weighted average so you can see what the whole day added up to.

648 ppm in a Parking Garage

In June 1994, five workers were resurfacing the floor of a closed underground parking garage in Washington, D.C., using two gasoline-powered pressure washers. The exhaust fan wasn't running and the main door was shut. Two workers collapsed, and all five were treated for carbon monoxide poisoning. An hour after the washers were turned off, firefighters still measured 648 ppm, according to the CDC's report. A low alarm point would have flagged the problem long before anyone went down.

What the Pro Adds

• Adjustable alarms: Set the low alarm anywhere from 5 to 100 ppm in 1 ppm steps, and the high alarm up to 500 ppm. Ships at 35 / 200 ppm.
• 24-hour exposure average (TWA): Breaks the last 24 hours into 8-hour segments and shows the highest average.
• Three-way alarm: Vibration, flashing LED, and an 80-85 dB buzzer.
• Certified intrinsically safe to UL 913 for Class I and II hazardous locations.
• Live ppm readout up to 1,999 ppm, with MAX recall.
• IP67 waterproof and dustproof, 2+ year battery, and a 1-year warranty.

Want the same features with a 2-year warranty? See the Inspector II Industrial Pro (INS2-CO-03).

Who It's For

• Mechanics, contractors and maintenance crews
• Warehouse and facility staff
• Anyone who wants to set their own alarm levels
• Anyone who wants a record of their exposure over the day

What's in the Box

• Sensorcon Inspector Industrial Pro CO detector, INS-CO-03
• 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

What does TWA mean?

Time-weighted average. It's your average CO exposure over a period of time. The Pro looks back over the last 24 hours in 8-hour segments and reports the highest one, so you can tell whether a full shift added up to more than any single reading showed.

Should I set the low alarm below 35 ppm?

Many users set it lower for an earlier warning. Expect more alerts when vehicles start up or equipment runs nearby.

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.

	StandardINS-CO-01	IndustrialINS-CO-02	YOU'RE VIEWING 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.