Is the online formaldehyde meter reliable in the end? After looking up a lot of information, it would be better to try it in person.

The fox wrote an article entitled "Nine methods for removing formaldehyde in Japan" two days ago.

At that time, after the accident in the formaldehyde room

Mrs. Fox was very frightened.

Keep asking: we often have health problems in the past two years. It's not because of renting, is it?

Honestly,

Relying on young people who work hard in big cities

How can the body not have any sub-health?

Formaldehyde has been so popular in the past two years.

For the most part, these health problems are unclear.

The fox hurriedly promised, "study home for so long."

You will not let your family get hurt because of your home. "

It is necessary to detect formaldehyde clearly.

Then see if it will do any harm to the health of the family.

The only thing that has legal effect is

Air quality monitoring organization certified by CMA

Issue the report with CMA Seal.

The cost is usually about 300 yuan per point.

If you test five rooms

It costs 1500 yuan.

So what the fox thinks is

Rent or buy, test it with the instrument first.

If something goes wrong, ask the agency to make a legally valid report.

Let's start with the conclusion:

The fox tested formaldehyde self-test box, imported sensor formaldehyde meter and Japanese Riken formaldehyde meter.

Check the five most important places in the home.

The conclusion is that "domestic use"

With hundreds of electronic formaldehyde meters

You might as well use a self-test box for a few yuan. "

The formaldehyde monitoring equipment tested by the fox from left to right is:

1.CMA certified formaldehyde self-test box, the hand price is 39.9 yuan for 10 boxes.

It's equivalent to 4 yuan for a box.

two。 Japan Riken FP-31, rental price 1999 / day

Add consumables 40 yuan / piece x 5 tablets = 200 yuan.

(the market price is 13000, which is generally considered to be the most reliable of the small formaldehyde meters.)

3. UK DART sensor formaldehyde monitor

Although it is made in China, the manufacturer is the only partner certified officially by DART in China.

If this machine is unreliable,

Then other domestic instruments that use DART sensors

And using instruments not as good as DART sensors.

Not to mention.

The price is 299 yuan and the hand price is 229.

The fox originally wanted to use only Liyan.

After all, renting is no longer cheap.

But considering that the first reaction of many readers may be to buy a formaldehyde meter

So I just happened to do a comparison test.

The fox also found that there are a lot of lateral evaluation of formaldehyde instrument on the Internet.

And I don't want to take the job of the evaluation institution.

But those evaluations are usually done in the laboratory.

Is it effective for the complex air environment at home?

For example, the smell of bread and wine in the kitchen

The glue smell of oil-proof stickers

Will cause interference to the formaldehyde meter.

Half an hour after the fox was tested,

The result is that

The result of Liyan's formaldehyde meter is 0.03, up to the standard.

And the result of online shopping formaldehyde meter is 0.12, which is not up to standard!

(the national standard is

The two results are inconsistent.

As far as the fox is concerned, he will believe the results of Riyan.

Because Riyan, this formaldehyde meter uses the photoelectric photometry stipulated in the national standard.

The principle of phenolic reagents used in the self-test box is also roughly the same as that of photophotometry.

However, the formaldehyde meters under 1000 purchased online are basically semiconductors or electrochemical methods.

None of them are the testing methods approved by the national standard.

The next test is the study.

One might say,

Electrochemical formaldehyde meter should "avoid alcohol gas and gas produced by cooking".

It's right after you avoid it.

Not to mention that there is so much gas in the house.

Aromatherapy essential oils at the bedside,

Snacks and mosquito spray in the living room,

The deodorant in the bathroom...

How much is to be avoided?

Secondly, there is no such gas in the study.

But it's still not allowed!

Next is the second bedroom where the old man lives.

It is also the most important place for the fox in this test.

Old people have the habit of opening windows.

And the air purifier is on 24 hours a day.

So this bedroom didn't find any formaldehyde.

Looking at the previous results, some people may still say

Although none of the above data is correct.

But the actual data are 1/4 of the formaldehyde meter purchased online.

Is it okay to divide it by 4 after the test?

But the formaldehyde in the second bedroom can be measured by online shopping formaldehyde meter.

But taller than before!

The fox was speechless by the time he saw the data.

And then the fox's master bedroom.

Because the formaldehyde meter must be above 70cm off the ground when testing.

If you put it on the nightstand to test

It may not be allowed.

So the fox is on the headboard.

By the way,

Doors and windows need to be closed for more than 12 hours before testing

So strictly speaking, the front windowing test is not compliant.

Please don't follow suit.

The master bedroom was tested after the doors and windows were closed for 24 hours.

The bed, the nightstand and the wardrobe next to it are all new furniture

All are made of synthetic plates.

So it's a little higher than the kitchen and the study.

However, it is not as serious as the online formaldehyde meter exceeding the standard by more than 2 times.

The headboard of the master bedroom can't hold the formaldehyde self-test box.

So put it on the nightstand and measure it.

The result was slightly higher than that measured by formaldehyde meter.

To be honest, the experience of formaldehyde self-test box is not very good.

Because most of the fox's house is orange and yellow.

There will be color difference, and the color temperature needs to be adjusted.

In addition, there will be some errors in naked eye recognition.

For example, the self-test box in the master bedroom on the right.

It's okay to say it's less than 0.1, and it seems to make sense to be higher than 0.1.

Just above the threshold line.

It's just a little bit of trouble.

But if you compare the self-test box in the kitchen

It is not difficult to find that the kitchen is yellow.

And it is not difficult to judge that the formaldehyde in the kitchen did not exceed the standard.

This is better than the online formaldehyde meter.

This is the self-test box for the study.

Although the shooting light is different.

It is impossible to compare the self-test box in the kitchen with that in the study.

However, it is not difficult to see that the study did not exceed the standard.

Finally, the fox wondered whether to test the wardrobe or the living room.

Since there is nothing wrong with the closed study and kitchen

The living room certainly doesn't need to be tested.

So I finally tested the wardrobe.

An airtight wardrobe

Unsurprisingly, the highest value of formaldehyde in the whole family was obtained, 0.06mg/m3.

The online formaldehyde meter is not useless.

At least a few times.

It can be found that the formaldehyde content in the wardrobe is the highest every time.

But it always gives scary data on whether it exceeds the standard or not.

Finally, I would like to introduce the DART sensor used in this online purchase of formaldehyde meter.

Whenever the online formaldehyde shopping instrument mentions the "electrochemical method"

Then the electrochemical sensor must be used.

At present, the most famous electrochemical sensor is DART in England.

The official website retail price of the DART sensor is RMB150.

(wholesale will definitely be lower.)

So the official price of a formaldehyde meter with this sensor is generally around 300.

However, at present, the domestic DART sensor is a little too deified.

In fact, the Chinese market accounts for more than half of DART sales.

It really doesn't have that kind of status in the international community.

That's for sure,

Although the fox strictly abided by the testing principles of the national standard this time,

But "it's not a rigorous laboratory test."

Nor does it mean that other online formaldehyde meters that use similar sensors will get the same results.

The above results are for your reference only.

Readers are also welcome to share reliable formaldehyde monitoring methods.

Anyway,

The result of the fox's monitoring this time is that the formaldehyde in the house did not exceed the standard.

I also wish everyone, like the fox, "just a false alarm."

Don't be fooled by the unreliable formaldehyde meter of online shopping.

Then invest a lot of money and energy on formaldehyde removal supplies.

This article is originally created by Kexi Life study Society.

Please indicate the source of the reprint.

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The fox will later use several formaldehyde products used this time.

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