| After-sales Service: | Warrranty |
|---|---|
| Warranty: | 1 Year |
| Brand: | Dienmern |
| Customized: | Customized |
| Portable: | Portable |
| Certification: | CE, RoHS |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier
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item
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Air quality monitor
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Warranty
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1 year
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Type
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portable gas analyzer
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Customized support
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OEM, ODM, OBM, Software reengineering
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Place of Origin
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China
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Guangdong
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Brand Name
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Dienmern
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Model Number
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DM502
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Material
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ABS
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Color
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white
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Display
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LCD Display
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Power supply
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Rechargeable Li-battery 1500mah
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PM2.5 Sensor
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Laser Scattering
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HCHO/TVOC Sensor
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Semiconductor sensor
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PM2.5 Measure Range
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(0-999 ug/M³)
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HCHO Measure Range
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( 0.001-1.999 Mg/M³)
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TVOC Measure Range
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(0.001-9.999Mg/M³)
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Weight
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350g
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Langder Technology Co.,Ltd is a modernized comprehensive scientific research enterprise which was established in March 2013, located in Shenzhen City, Guangdong Province China.
It is mainly in the business of research and development, production, sales of all kinds of Testing instruments and tools , It has established extensive cooperative relations with partners
in Netherlands,Spain, Germany ,France, Britain, Poland, Switzerland,Italy,Ireland, Romania,Chile, Mexico, the United States,Japan,korea etc.
At present, the factory is mainly producing and supplying :
1. All kinds of air quality montior detectors
including :
-CO2 Meter with wirelss TUYA WIFI app
-WALL mount CO2 Meter
-Mini Smart CO2 Meters
-Mult-function Air quality monitor test CO2 pm2.5,PM1.0,PM10,HCHO,TVOC
2. Decibel Meter
3.Decibel & CO2 Meter
4.Ozone ( O3 ) Meter
5.NH3 Detector Meter
6.Weather station with TUYA WIFI APP
7.Alcohol Tester
8.Radiation detector
our ceritificates : CE, ROHS, PSE Battery MSDS
Since its establishment , the Company has won the title of China's national high-tech enterprise and is the top quality merchant of Alibaba for years,
Production scale has 3000 square meters, and with 100 employees.
Langder has a strong independent research and development team, all Products are from its own private designs and have the apperance patents.
It not only provides system solutions for various industries, but also provide product design and OEM services for customers .
1 Q: What the test index are include for air quality monitor?
A : PM2.5: is main for smog(PM1.0 and PM10 are the same); HCHO: is for formaldehyde; TVOC: is main for benzene,etc Volatile organic compounds; AQI: is for Integrated air quality index.
2. Q: What is the safe range for formaldehyde (HCHO) and TVOC?
A : HCHO≤ 0.10mg / m3 TVOC≤ 0.60mg / m3 According to ("indoor air quality standards" GB / T 18883-2002 and GB 50325-2001 Class II civil construction).
3 Q: What is the standard range for PM2.5?
A: Good 0~12 Medium 12~35 safe value 35~70 Unhealthy more than 70
4 Q: Why do I need to calibrate(Just HCHO and TVOC need to calibration, PM2.5 and AQI no need)? 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 calibrated first 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.
5.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 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 always 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.
7 Q: Why does the products make a sound when working? A : As PM2.5 detection need to collect a lot of mobile air, the inner fan needs strong operation to ensure accurate detection.
8 Q: How much range of detection of formaldehyde concentration detector,how many square meters? A : Test area≤ 50m3, room should be set 1~3 testing points; 50m3 ≤ Test area≤ 100m3, room should be set 3~5 testing points; ≥100m3, the points should more than 5 ponits. Testing points is on a diagonal or plum blossom evenly distributed, would more better. The height of the sampling point: in principle,consistent with the human breathing. Relative height of 0.5m ~ 1.5m between.
9 Q: which kinds of air index exceeded, would lead to Alarm sound? A: Just HCHO data more than 0.10mg / m3, would lead to Beep sound.
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