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 2.GQ Geiger Muller Counter
 A question about these level reading results		  New Topic  Reply to Topic
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BlueSky

25 Posts
Posted - 01/21/2012 :  15:49:23  Show Profile  Reply with Quote
Thanks as always for helping me. I'm getting readings back from parts of the house. (levels posted below)

~Are these levels a bit high anywhere? Is the Quartz level high? The unit was beeping at it

Living room
15 CPM .05 uSv/h total count 255

Kitchen air and sink water avg
19 CPM .05 uSv/h


Upstairs bedroom
22 CPM .05 uSv/h

Sunroom with slate floor
22 CPM .05 uS/h Total Count 155

Basement
30 CPM .09 uSv/h
4 minutes in basement on rock wall= avg was 72 CPM @ 0.17 uSv/h
Avg 65 to 95 CPM after 12am with spike to 109 CPM for few seconds

There was a spike of 664 CPM for 10 seconds @ 11:07 pm (heater on at 11p)
649 CPM for 10 seconds @ 11:37 pm
629 CPM for 10 seconds @ 12:47 am
625 CPM for 10 seconds @ 1:47 am
540 CPM for 10 seconds @ 2:17 am
633 CPM for 10 seconds @ 2:47 am
653 CPM for 10 seconds @ 2:57 am

Fireplace mantle
94 CPM .22 uSv/h Total Count 485

13lb Quartz point (from a village in China)
116 CPM .60 uSv/h Total Count 1818

His coat pocket
63 CPM .15 uSv/h Total count 760

Her coat pocket
56 CPM. .13 uSv/h Total count 1498

Microwave
In front of door when on 26 CPM .05 uSv/h Total Count 55
Door opened right after use 24 CPM .04 uSv/h Total Count 35
Back when in use 28 CPM


Snow on 1/21 (6 inches, sample taken is from surface snow to 1”deep)
5:30p est
39 CPM .07 uSv/h
8p est
20 CPM .05 uSv/h total count 55

In front of 1500watt quartz heater
21 CPM .05 uSv/h

Banana
23 CPM .05 uS/h Total Count 33

Cellphone (idle and in use were the same uSv/h)
23 CPM .06 uSv/h Total Count 43

Car
17 CPM .04 uSv/h Total Count 105

Vacuum cleaner (not on)
Spiked CPM 95 .20 uSv/h stayed there for 25 secs
Edited by - BlueSky on 01/22/2012 13:23:35
Reply #1

ZLM

1261 Posts
Posted - 01/21/2012 :  17:04:57  Show Profile  Reply with Quote
The "Total count" may not much meaningfull if the testings done not in exact same time length.

Also, to get ride of random testing result, repeat testing two or three times will help to get a consistant testing result. Turn off the geiger counter for 1~3 minutes between each testing.

Spiked value does not say anything, The most importand value is average CPM.

From your testing I can see there are 2~3 testings has higher radiation level, but they may still in a safe range:

1. 13lb Quartz point (from a village in China) CPM 116

2. basement on rock wall= avg was 72 CPM

3. Her coat hood 91 CPM


Repeat the testing and get consistant average CPM reading.

Quartz is kind of stone. Many stones has higher level radiation.

The good news is your Living room and Upstairs bedroom are very normal.

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