Dienmern portable gas detector

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  • 1 - 999 Pieces
    US $50.00
  • >=1000 Pieces
    US $30.00
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Quick Details
Place of Origin:
Guangdong, China (Mainland)
Brand Name:
Model Number:
Detecting Data:
in office, indoor and fitment pollution detection
Recjargeable Battery Capacity:
Supply Ability
Supply Ability:
10000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
Color Box Packing
shen zhen
Lead Time :
sample time 5-15 days / lead time 20-25days
Product Description

Dienmern portable gas detector  

  • 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.


Product pitures



General Characteristic:

Size: 95mm L x 90mm H(Portable Size)


Working Temperature:-20-70℃

Battery Powered:2*AA             

Sigal Weight:150g(Battery Included)

Working Voltage:2.4V-3V

Product Color:White/Black




Whats is Included:

1*PM2.5 Monitor

1*USB Cable

1*Use Manual



1.Items Must Be Placed on The Indoor Static More Than An Hour Then It 

Will Show The Actual Data. If Randomly Moved, The Data Will Be Inaccurate.

2.If You Can Ensure A Clean Environment, The Goods Can Be The Calibration Data, And Them Measure. If Items Are In Low Battery, The

Data May Be Inaccurate.

Company Information

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.





Formaldehyde calibration method:

Put the device into a place of good air quality , let it aside for 5-10 minutes,

Double click the "OK" button when the device stay at interface 1


The Initial values of Formaldehyde and TVOC are 1.999 and 9.999 ,the device needs manual calibration before working.


1.Any sensor will be subjected by certain external substance when working,so please keep it away from Alcohol, Perfume , Chemical volatile gases,smoke and so on when you check.

2.Indoor air is circulating ,the gases go into sensor vent are different at different time,the amount of formaldehyde in the air may be also different.So It is normal that the detection value is floating up and down.

3.Avoid the fan, heater and other strong directly winds blown vent hole interference test results of the accuracy when use the device.

The product should be placed in a relatively stable area of air flow, so that the detection can be accurate.

4.Before you use the device to test the HCHO and TVOC in the bedroom, living room, cloakroom and other space,it is better to seal the windows, doors for 24 hours and then tested. in addition,the average content of air is derived from the average value of multiple points test data in the room.

Common problem:

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.

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.

Q: How much range of detection of formaldehyde concentration detector,how many square meters?


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.

4.Q: Why PM2.5 readings with the published value on the site is not the same?

5.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.

6.Q: Why is the PM2.5 test value changing?

A: PM2.5 data are changing at all 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.

7.Q: Why is the product sounding when working?

A: 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.

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)