2. Nice quality.
3. Small order is welcome.
4. Online payment.
5. Refund money in case of bad quality.
6. Sample offered but you need to pay it.
7. 1 year free repair for quality warranty.
Item No.
Elements |
BGT-W817B pro
|
BGT-W818 pro
|
BGT-W818B pro
|
BGT-W818C pro
|
BGT-W820 pro
|
PM2.5
|
√
|
√
|
√
|
√
|
√
|
PM10
|
√
|
√
|
√
|
√
|
√
|
CO
|
|
√
|
|
|
√
|
SO2
|
|
√
|
|
|
√
|
NO2
|
|
√
|
|
|
√
|
O3
|
|
√
|
|
|
√
|
Temperature
|
√
|
√
|
√
|
√
|
√
|
Humidity
|
√
|
√
|
√
|
√
|
√
|
Pressure
|
√
|
|
√
|
√
|
√
|
Speed
|
√
|
|
√
|
√
|
√
|
Direction
|
√
|
|
√
|
√
|
√
|
Rainfall
|
|
|
|
√
|
√
|
iIlluminance
|
|
|
|
√
|
|
Radiation
|
|
|
√( thermo-electric)
|
|
|
Noise
|
√
|
|
|
|
|
UV
|
|
|
|
|
|
Elements
|
Range
|
Resolution
|
Accuracy
|
Configuration
|
Temperatire
|
-40-123.8℃
|
0.1℃
|
±0.3℃
|
Customized
|
Humidity
|
0-100%RH
|
0.10%
|
±2%(≦80%)±5%(>80%)
|
Customized
|
Dew point temperature
|
-40-50℃
|
0.1℃
|
Calculated value (complimentary)
|
Customized
|
Maximum temperature of the day
|
-40-123.8℃
|
0.1℃
|
Calculated value (complimentary)
|
Customized
|
Minimum temperature of the day
|
-40-123.8℃
|
0.1℃
|
Calculated value (complimentary)
|
Customized
|
Ultrasonic direction
|
0-360°
|
1°
|
±2°
|
Customized
|
Ultrasonic speed
|
0-60m/s
|
0.1m/s
|
±2%(≦20m/s) ±2%+0.03V m/s(>20m/s)
|
Customized
|
2 min average wind speed
|
0-60m/s
|
0.1m/s
|
Calculated value (complimentary)
|
Customized
|
10 min average wind speed
|
0-60m/s
|
0.1m/s
|
Calculated value (complimentary)
|
Customized
|
electronic compass
|
0-359.9°
|
0.1°magnetic variation
|
±4°
|
Customized
|
Pressure
|
300-1100hpa
|
0.1hpa
|
±0.12hpa
|
Customized
|
Rainfall
|
0-999.9mm
|
0.2mm\0.5mm
|
≦0.2mm
|
Customized
|
Total radiation(Photoelectric)
|
0-2000W
|
1W/㎡
|
≦5%
|
Customized
|
Total radiation daily accumulation
|
0-99.99
|
0.01
|
Calculated value (complimentary)
|
Customized
|
Total radiation monthly accumulation
|
0-9999
|
1
|
Calculated value (complimentary)
|
Customized
|
Total radiation annual accumulation
|
0-9999
|
1
|
Calculated value (complimentary)
|
Customized
|
UV
|
0-500w
|
1W/㎡
|
≦5%
|
Customized
|
CO2
|
0-2000ppm
|
1ppm
|
±20ppm
|
Customized
|
Noise
|
30-130dB
|
0.1dB
|
±5dB
|
Customized
|
PM2.5
|
0-500ug/m³
|
0.01m3/min
|
±10%
|
Customized
|
PM10
|
0-1000ug/m³
|
0.01m3/min
|
±10%
|
Customized
|
illuminance
|
0-200000 Lux
|
|
±7%
|
Customized
|
sunshine duration
|
0-24h
|
0.1h
|
±0.1h
|
Customized
|
Soil temperature
|
-50-80℃
|
0.1℃
|
±0.1℃
|
Customized
|
Soil moisture
|
0-100%RH
|
0.1%
|
±2%
|
Customized
|
Soil EC
|
0-15mS/cm
|
0.01
|
±0.5%
|
Customized
|
Soil PH
|
1-14PH
|
0.1
|
±2%
|
Customized
|
Evaporation
|
0-200mm
|
0.1mm
|
±1.5%
|
Customized
|
PAR
|
0-500W
|
1W/㎡
|
≦5%
|
Customized
|
CO
|
0-10ppm
|
0.001ppm
|
±3% FS
|
Customized
|
SO2
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
O3
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
NO2
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
VOCvolatile matter
|
0-20ppm
|
0.001ppm
|
±3% FS
|
Customized
|
H2S
|
0-10ppm
|
0.001ppm
|
±3% FS
|
Customized
|
NH3
|
0-10ppm
|
0.001ppm
|
±3% FS
|
Customized
|
CH2O
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
CI2
|
0-10ppm
|
0.001ppm
|
±3% FS
|
Customized
|
C2H4O
|
0-100ppm
|
0.001ppm
|
±3% FS
|
Customized
|
H₂O₂
|
0-100ppm
|
0.001ppm
|
±3% FS
|
Customized
|
H2
|
0-1000ppm
|
1ppm
|
±3% FS
|
Customized
|
HCl
|
0-20ppm
|
0.01ppm
|
±3% FS
|
Customized
|
HCN
|
0-20ppm
|
0.01ppm
|
±3% FS
|
Customized
|
PH3
|
0-20ppm
|
0.01ppm
|
±3% FS
|
Customized
|
O2
|
0-30%VOL
|
0.01%VOL
|
±3% FS
|
Customized
|
N2
|
0-100%VOL
|
0.01%VOL
|
±3% FS
|
Customized
|
NO
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
ClO₂
|
0-50ppm
|
0.01ppm
|
±3% FS
|
Customized
|
CH4S
|
0-10ppm
|
0.01ppm
|
±3% FS
|
Customized
|
C₂H₄
|
0-100ppm
|
0.01ppm
|
±3% FS
|
Customized
|
Br2
|
0-10ppm
|
0.01ppm
|
±3% FS
|
Customized
|
THT
|
0-50ppm
|
0.01ppm
|
±3% FS
|
Customized
|
F2
|
0-1ppm
|
0.01ppm
|
±3% FS
|
Customized
|
HF
|
0-10ppm
|
0.01ppm
|
±3% FS
|
Customized
|
HBr
|
0-20ppm
|
0.02ppm
|
±3% FS
|
Customized
|
COCl2
|
0-1ppm
|
0.001ppm
|
±3% FS
|
Customized
|
CH4
|
0-5000ppm
|
1ppm
|
±3% FS
|
Customized
|