Dienmern Particulate Matter DM103 PM 2.5 Detector Air Quality Monitor

Dienmern  Particulate Matter DM103 PM 2.5 Detector Air Quality Monitor  PM2.5 Dust Meter Air Analyzer

• Large LED Screen with Bright Backlight, Convenient To Use
  
• An Ideal Tool To Monitor The Formaldehyde/TVOC Concentration At Home 
  
• Use For Office, Inside A Car Or During Interior Decoration and Outdoor Environmental Testing
• 24 Hours of On-Going Real-Time Monitor Of Indoor Formaldehyde/TVOC
• It iS Pocket-sized,Very Convenient to Carry and Measure The Air Auality Around You. This Device Can Measure PM ,HCHO,TVOC. Besides, This Detector Can Be Programmed and Revise the Interface According to Your Preference. We Will Provide The Programming Instruction.

Shenzhen Langder Technology CO.,LTD ,an integrated enterprise of research and development, 

production and sales,is located in the economic zone of Shenzhen,which covers a space of 1000 square  meters large.

We are the professional manufacturer who specialize in Popular promotional Electronic technology gifts, Wearable products, Electronic wearable products , Smartphone accessories , Car accessories ,Season products ,home products . 

We have done business with large Company like Vtech, Hama , Tesco , Amazon , Volkswagen, KFC , Disney.....You can find our products selling on supper market such as Walmart . 

We have good busines and markets Europe,America,middle east and Australia, Chile from South America , Malaysia,Singapore .

We always belive that : Quality , Sevices , Details determine sucess and failure.

QA :

1 Q: the test value has been 0, spray

perfume will rise?

A :

Please re-calibrate outdoors. avoid

spices, perfume, paint, cigarettes, air fresheners,

alcohol and other chemical pollutants when

testing, so as not to damage the sensor.

2 Q: Why do I need to calibrate?

A :

Our products work in the form of outdoor

formaldehyde-free air sampling as a benchmark,

and then get indoor air formaldehyde content as

a comparison, so the new machine products for

a long time not used, the detection of

environmental temperature changes need to

change First calibrated and then tested, the

value of this calibration for the subsequent

detection of the accuracy of a great relevance.

Calibration environment must avoid spices,

perfumes, paint, cigarettes, air fresheners,

alcohol and other chemical pollutants, so as not

to damage the sensor.

3.Q: Why PM2.5 readings with the

published value on the site is

not the same?

A :

Because the location and conditions of the test

is difficult to reconcile with the weather station,

the weather station in the city there are several

sampling points, each sampling point measured

data are also very different, the sampling point

of the location is strictly required; height 3 to 30

meters, air circulation, can not be close to the

chimney, furnace and other obvious sources of

pollution. And there are no high-rise buildings,

trees or other obstructions that can impede the

flow of ambient air around the instrument.

4 Q: Why is the PM2.5 test value

changing?

A :

PM2.5 data are changing all the times, with the

air, wind, humidity and other environmental

factors change, in the room smoking, cooking

fumes, car exhaust emissions, coal, chimney,

furnace Such as pollution sources will change

the PM2.5 value of this area, resulting in

differences in the detection data.

5 Q: Why is the product sounding

when working?

A :

As PM2.5 detection need to collect a lot of

mobile air, in order to ensure accurate detection

of the fan needs strong operation, so a little

sound is normal.

6 Q: How much range of detection

of formaldehyde concentration

detector,how many square

meters?

A :

1. The principle is less than 50m3 ,the room

should be set 1 to 3 points;50 ~ 100m3 Set 3 to

5 points;More than100m3 at least 5 points. On

a diagonal or plum blossom evenly distributed.

2.Sampling points should avoid the ventilation,

from the wall distance greater than 0.5m.

3.The height of the sampling point: in principle,

consistent with the human breathing.Relative

height of 0.5m ~ 1.5m between.

7 Q: the test value has been 0,

spray perfume will rise?

A :

Please re-calibrate outdoors. Detection of

spices, perfume, paint, cigarettes, air fresheners,

alcohol and other chemical pollutants, so as not

to damage the sensor.

8 Q: What is the standard for

formaldehyde (HCHO)?

A : ≤ 0.10mg / m3 ("indoor air quality

standards" GB / T18883-2002)

9 Q: What is the standard for total

volatile organic compounds

(TVOC)?

A: ≤ 0.6mg / m3 (GB / T 18883-2002 and

GB 50325-2001 Class II civil construction)