Sensorcon Inspector II Industrial Pro CO Detector, Adjustable Alarms, INS2-CO-03

Our most capable Inspector. The Sensorcon Inspector II Industrial Pro is waterproof, vibrates when it alarms, lets you set alarm levels as low as 5 ppm, and keeps a 24-hour exposure average. Take it to work, on the water or on the road. It comes with a 2-year warranty.

For Work, the Water and the Road

Anywhere engines, generators or heaters run near people, from a job site to a garage, an RV or a boat cabin, CO can build without warning. The Industrial Pro's IP67 housing handles rain and spray, its vibrating alarm works when you can't hear a buzzer, and a low alarm point gives you the earliest possible warning.

Lake Powell, August 2000

Two brothers, ages 8 and 11, died at Lake Powell after swimming into the space under a houseboat's swim deck, where the generator vented its exhaust. In its report on the deaths, the CDC counted nine fatal boat-related CO poisonings at Lake Powell since 1994. No detector can protect someone in the water, so keep everyone away from the stern whenever an engine or generator is running. Aboard, a low alarm point gives you the earliest possible warning.

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): Shows what a full day aboard added up to.
• Three-way alarm: Vibration, flashing LED, and an 80-85 dB buzzer you can hear over an idling engine.
• 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 2-year warranty.

Want the same features for less? The Inspector Industrial Pro (INS-CO-03) has a 1-year warranty.

Who It's For

• Contractors and crews working near engines and generators
• Boat and RV owners
• 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 II Industrial Pro CO detector, INS2-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

Does this replace installed CO alarms?

No. Keep the CO alarms installed in your home, RV or boat. The Inspector II Pro adds a live reading you can carry with you, plus a record of your exposure over the day.

What does TWA mean?

Time-weighted average. The Pro looks back over the last 24 hours in 8-hour segments and reports the highest average, so you can tell whether a day aboard added up to more than any single reading showed.

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 Inspector II Models

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

	StandardINS2-CO-01	IndustrialINS2-CO-02	YOU'RE VIEWING Industrial ProINS2-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	2 years	2 years	2 years
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.