'/%3E%3C/svg%3E)
Hover image to zoom
C161, Flue Gas Combustion Analyzer
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
 --%3E %3Csvg version='1.1' id='Half' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cg%3E %3Cpath fill='%23F15C02' d='M30.05,70.23l3.79-12.01L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1h1.58 L93.71,7.18c-3.58-3.82-8.66-6.23-14.28-6.23H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,5.41,2.22,10.32,5.79,13.88 L30.05,70.23z'/%3E %3C/g%3E %3Cpath fill='%23FBC8B4' d='M93.71,7.18L60.98,39.6H91.2L65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82l5.55-17.59L6.75,93.32 c3.55,3.54,8.44,5.73,13.82,5.73h58.87c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,15.4,97.01,10.69,93.71,7.18z'/%3E %3C/svg%3E){kind=small}
 --%3E %3Csvg version='1.1' id='With-RB' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23FBC8B4' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
$593.26 each
In Stock
Get 16 Tue, Jun 9
Order by today, receive Tuesday
MANUALS (3)
This item replaces: C75, C85, C75KIT, C85KIT
'/%3E%3C/svg%3E){kind=small}
Free Shipping This item ships free
Easy Returns No restocking fee for 90 days
Product Highlights
–
10 Year Warranty
Description
–
All UEi combustion analyzers have a standard 1-year warranty. With UEi Service+ each recertification includes a full inspection and extends the warranty for 1 more year for up to 10 years from the date of purchase. For further details plus additional benefits please head to https://www.ueitest.com/ecommerce/AboutOurService.aspx
Note: To make this a kit, please purchase IRP-2 separately.
Backed by UEi Service+ to give up to 10 years of warranty, SAME DAY GUARANTEED recertification, and a reduced cost of ownership.
The C161 Residential Combustion Analyzer is easy to use and features a newly added heat exchanger test, differential temperature, rugged design, multiple sensor protections, and altitude compensation. This analyzer calculates essential information for installing and maintaining gas appliances. Prints to optional printer.
Features
Note: To make this a kit, please purchase IRP-2 separately.
Backed by UEi Service+ to give up to 10 years of warranty, SAME DAY GUARANTEED recertification, and a reduced cost of ownership.
The C161 Residential Combustion Analyzer is easy to use and features a newly added heat exchanger test, differential temperature, rugged design, multiple sensor protections, and altitude compensation. This analyzer calculates essential information for installing and maintaining gas appliances. Prints to optional printer.
Features
- Backed by UEi Service+ with up to 10-year warranty
- UEi Service+ offers same-day guaranteed recertification with free freight
- Sensor technology designed to reduce cost of ownership and risk of cross-contamination
- Rugged design with 6-line display
- Magnet for hands-free work
- DMM-style approach
- Heat Exchanger Test
- 2 levels of sensor protection
- NOx filtered CO sensor
- Low Flow Detection
- High altitude compensation
- Temperature Differential w/ K-Type probe inputs
- Protective water trap
- Print to optional printer
- 8 pre-programmed fuels
- Protective rubber boot
- Quick Start Guide
- 3 (AA) Rechargeable Batteries
- CP2 Flue Probe
- USB Charging Cable (AACA5)
Specs
–
| Product Type: | Analyzer |
|---|---|
| Type: | Combustion Tool |
| Application: | Residential |
| Flue Gas Temperature (F): | 32° to 1112°F |
| Operating Temp Range: | 32°F to 113°F |
| Excess Air: | 0 to 119.9% |
| Carbon Monoxide: | 0 to 2000 ppm |
| Oxygen: | 0 to 21% |
| Warranty: | 10 Year |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Compare Similar Products
Brand
Product Type
Type
CURRENT ITEM
Analyzer
Combustion Tool
You May Also Need
2 Replacement Parts
Need help finding a replacement part?
Fill out the part request form and someone will get back to you shortly.
PART REQUEST FORM
Product Reviews
3.73 out of 11 reviews
82% would recommend this product
5 star
36%
4 star
27%
3 star
18%
2 star
9%
1 star
9%
Customer Images
Most Liked Positive Review
Great Analyzer
I think this is a great analyzer for someone who does occasional combustion analysis like me. Here in Dallas we are not a heating dominated market but I wanted to get an analyzer to do things the right way. I like that it has a NOX filter (which is a must on an analyzer to prevent cross contamination)
Sometimes its a little finnicky about turning off. And you can't see all the data displays on a single screen, for example you can see almost everything except stack temp on one screen. But oh well, not the end of the world.
All in all, a good analyzer for the price. And they have a fast turn around on servicing the sensors, which will be necessary to keep it up and running.
VS
Most Liked Negative Review
Poor documentation, marginal product
To start with I had to change fuel gas, which I guess is to be expected, but how do I choose between "Propane" and "LPG"; as far as I know they are one and the same. Look to the "Quick Start" guide, no help, print the manual, still no help, so I pick one. Then it's on to trying to adjust my boiler with my best guess as to fuel. Instrument is making noise but it does not tell me what it's doing, except when it's purging. How about saying "sampling" when that is happening? Could not get a CO2 reading on boiler low fire, display just showed "-----" forever. Had no idea what it was doing. Then it finally said "Low Flow". With respect to what? Sampling gas or flue gas? Back to manual: not a word on what "Low Flow" really means or how to deal with it. Finally, I figure out that to get a measurement on low fire I have to back into it from high fire by reading continuously under continuous firing. After wasting hours I get the boiler adjusted and obtain the readings I need, it's now time to turn it off. Push the power button and hold for off, instructions tell me it will purge for 10 seconds, then shut off. But that does not happen. It repeats several 45 second purge cycles then shuts off.
Instrument appears to work, documentation and display of status are absolutely horrible and diminish my confidence in the instrument itself. It would take so little effort to actually write a decent step-by-step guide and have the instrument simply display what is happening. Without it this $500+ instrument is worth just about nothing.
Showing 1-10 of 11 reviews
Analyzer calibration certificate was expired
Analyzer Calibration certificate was expired upon receiving. last calibration was done from the factory AUG2024 and we received ours OCT2025 Item was 2 months out of tolerance. Supply house did credit us the cost to send the Analyzer back to UEi for recertification. I suggest calling Supply House upon purchase and have them check the certificate date before item gets sent.
HVAC Service
Montana
6 months ago
Verified Buyer
Was this review helpful to you?
I would buy with caution.
I use an analyzer on average 3-4 times a day throughout the year. The UEI 161 is mostly practical, it was purchased for price and price alone. It is not the most user friendly, nor is it the easiest to use. But the ones thst are the best are ridiculously expensive, and mostly overkill for a residential hvac guy. I get them calibrated and ready every fall. The 161 has always failed consistently on me right at about the time I need it most, during February. So I keep two. The biggest downside is the purge cycle. 60 seconds is a lifetime every time these things want to shut down & self purge. Usually right in the middle of a test. I really like the testo products but I cant seem to find a supplyhouse near me that carries the basic model anymore. It was smaller & had a much shorter test hose for easier storage. It also did a 30 second purge. It is still better than the ole Bacharach chemical test. Lol
Merd
Columbus Ohio
8 months ago
Verified Buyer
Was this review helpful to you?
Great Meter for what we do.
This meter is used by my field staff that need to do Combustion Safety tests on Gas and Oil heating equipment, My team likes the ease of using these, Comparable to the units we used before but priced better and seem to be more dependable.
CLR 1
Massachusetts
1 years ago
Verified Buyer
Was this review helpful to you?
Seems good but dead batteries on arrival
The rechargeable batteries were completely dead when it arrived and wouldn't hold a charge. Once, I replaced the batteries, it seemed to work as expected. Hopefully, recertification is as easy as they say. We'll see how that goes next year.
Jed
Utah
1 years ago
Verified Buyer
Was this review helpful to you?
Poor documentation, marginal product
To start with I had to change fuel gas, which I guess is to be expected, but how do I choose between "Propane" and "LPG"; as far as I know they are one and the same. Look to the "Quick Start" guide, no help, print the manual, still no help, so I pick one. Then it's on to trying to adjust my boiler with my best guess as to fuel. Instrument is making noise but it does not tell me what it's doing, except when it's purging. How about saying "sampling" when that is happening? Could not get a CO2 reading on boiler low fire, display just showed "-----" forever. Had no idea what it was doing. Then it finally said "Low Flow". With respect to what? Sampling gas or flue gas? Back to manual: not a word on what "Low Flow" really means or how to deal with it. Finally, I figure out that to get a measurement on low fire I have to back into it from high fire by reading continuously under continuous firing. After wasting hours I get the boiler adjusted and obtain the readings I need, it's now time to turn it off. Push the power button and hold for off, instructions tell me it will purge for 10 seconds, then shut off. But that does not happen. It repeats several 45 second purge cycles then shuts off.
Instrument appears to work, documentation and display of status are absolutely horrible and diminish my confidence in the instrument itself. It would take so little effort to actually write a decent step-by-step guide and have the instrument simply display what is happening. Without it this $500+ instrument is worth just about nothing.
Annoyed in NE
NH
1 years ago
Verified Buyer
Was this review helpful to you?
No problems so far
I use this for energy audits and have had no problems so far. I like the fact that it has protection built in for the sensors and the price was reasonable.
JA
Berea, KY
2 years ago
Verified Buyer
Was this review helpful to you?
Great Analyzer
I think this is a great analyzer for someone who does occasional combustion analysis like me. Here in Dallas we are not a heating dominated market but I wanted to get an analyzer to do things the right way. I like that it has a NOX filter (which is a must on an analyzer to prevent cross contamination)
Sometimes its a little finnicky about turning off. And you can't see all the data displays on a single screen, for example you can see almost everything except stack temp on one screen. But oh well, not the end of the world.
All in all, a good analyzer for the price. And they have a fast turn around on servicing the sensors, which will be necessary to keep it up and running.
Dallas HVAC
Dallas TX
3 years ago
Was this review helpful to you?
Easy setup and easy at a very good price.
Since I'll only be using my C161 once a year during annual maintenance of my high efficiency boiler, it is nice to know that there's no old school two year self destruct oxygen sensor ticking away inside this unit.
Mike
Sequim, WA
3 years ago
Verified Buyer
Was this review helpful to you?
Pretty good
Settings can be changed to display what you like to see So far it's pretty good for the price.
Goose
Fresno ca
3 years ago
Verified Buyer
Was this review helpful to you?
I would not buy again.
The device is great while it works but that is the problem. I've bought 2 in 2 years and the battery won't stay charged. I would never buy again for the price it is NOT a good investment until they fix the battery issues. Also, I only used it 20 times so it's not that. Two thumbs down on this one.
Dylan
Virginia
4 years ago
Was this review helpful to you?
Free Shipping
On orders over $99
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
Shipping PolicyEasy Returns
Returning items is as simple as 1-2-3
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.
Return Policy