Radon Monitor, what do you use?

[barlyhop]

One of my Sun Nuclear 1027's may have just died. I am sending it in for troubleshooting. In the worst case scenario I may elect to replace it. I have been happy with the monitor and it's ease of operation. It does have a high variable of plus or minus 1 pCi/l. The cost of the new Sun Nuclear is $800 which they have stated is only better in the reporting area of the product compared to the predecessors.

Looking for input on preferred monitors from all of you seasoned inspectors.

Thanks

[Terence McCann]

Just do a forum search Randy as this has been discussed many times before. Not trying to be rude - just trying to save you some time.

[John Dirks Jr]

The recalibration fee is $135 and that includes any repairs that it may need. Send it in to SunNuc. I sent in a non-functioning unit and it came back fixed and calibrated for $135.

[Neal Lewis]

I thought the accuracy of the 1027 was +/- 20%. How could they just say +/-1 pCi/L over a wide range of readings?

[barlyhop]

Thanks guys.

The margin is +/- 25% and 1pCi/l whichever is greater after 24 hours.

[Les]

I am lost on this thread. You are saying "The margin is +/- 25% and 1pCi/l whichever is greater after 24 hours"

So a 48hr EPA avg is 1.1pCi/l and in fact it could be .1 or 2.1pCi/l?

[barlyhop]

Hey John, what went wrong with your monitor and what was the turn-around time on it?

My most recent test printed out with mostly all 4.0's, a few 8.0's and in the middle of the test I had a 552, 712 and some other erroneous number. The average was stated at 30.6

Glad I have a back-up monitor.

Randy

[barlyhop]

Hey Les, yes, that is what the 1027 manual states

It also states US EPA accepted, so I am ok with this. I have never cross-referenced with the Mitigators test results or any other, but that may be something that I will have to do.

I have the same concerns as you do regarding the accuracy.

Randy

[Les]

Randy,

I posted before my complete thought made it to my fingers! imagine that.

It was your use of "and" that I was picky about; I don't think it is 25% and 1pCi/l, rather the greater of the two choices.

I have several 1027's and even one 1025! good devices as long as a person understands what the whole process is about. After making 10's of thousands of dollars from radon screenings, I remain unconvinced the protocol is correct.

[John Dirks Jr]

Hey John, what went wrong with your monitor and what was the turn-around time on it?

My most recent test printed out with mostly all 4.0's, a few 8.0's and in the middle of the test I had a 552, 712 and some other erroneous number. The average was stated at 30.6

Glad I have a back-up monitor.

Randy

I bought 3 used 1027's from a retired inspector. He threw in a 4th non-functioning unit. It was not registering at all. I sent it in along with a functioning unit. The turn around time was normal as they describe on their site. 30 days total, out my door and back in my door, all shipping time included.

[pete moss]

sun 1027

have 10 of them

would not have anything else....