B = (y
s
* x
0
- y
0
* x
s
)/ (x
0
- x
s
)
-Example of A, B calculation for LoraWAN Ammonia Gas sensor (item code WSLRW-G4-NH3-100-01):
* With condition of clean-air environment at a temperature from 20 - 30 oC, there is no ammonia gas (y
0
= 0); while
the NH3 level on reading device (RAW_VALUE in the payload) is -0.25 (x
0
= -0.25)
* When the sensor is connected to standard gas cylinder having ammonia level of 25 ppm (y
s
= 25); while the NH3
level on reading device (RAW_VALUE in the payload) is 18.66 (x
s
= 18.66)
*The calculation of A, B for the Ammonia gas sensor:
A = (0 - 25) / (-0.25 - 18.66) =1.32205
B = (y
s
* x
0
- y
0
* x
s
)/ (x
0
- x
s
) = (25 * (-0.25) - 0 * 18.66)/ (-0.25 - 18.66) = 0.33051
- User can use the off-line tool or downlink to write the values of A and B;
- Writing the new A and B successfully meant you had done the calibration process. Congratulation!
Depending on what type of gas sensor is used in the G4 gas module, the applications will be different. Please refer for
some applications:
Gas type
Typical applications
NH3 Ammonia Gas
NH3 leakage detection for HVAC, Chiller...
NH3 concentration in the toilet
NH3 concentration in the animal farms; chicken, pig, cow...
NH3 concentration in the ambient air (Air quality monitor)
H2S
H2S gas monitor for the sewage treatment system
H2S gas monitor for indoor air quality
H2S gas monitor for basement floor
H2S gas monitor for the trash bin
H2S gas monitor for solid waste treatment plant...
Cl2 Chlorine gas
Chlorine gas leakage detection in the chemical process plant
Chlorine gas monitoring in ambient air in the water treatment plant
Chlorine toxic gas monitoring in the City ...
- Place the sensor in the area to monitor the target gas concentration. Please always check the gas molecular weight
v.s the air.
- For example, NH3 gas has a lighter weight than air, so the sensor must be placed at a height higher than the source
of NH3 leakage. Normally, the sensor will be mounted at a height of 1.6m from the ground.
The factory default A = 1 and default B = 0
Use RAW_VALUE in the payload on the reading device for calibration
Step 4: Configure the new A and B into the device
4. Application notes for the Daviteq G4 Gas
Sensor
5. Installation notes
Notes:
* Avoid the place with humidity higher than 90% RH all the time (a short time in 2-3 days is acceptable)
* if the Sensor is intended to install outdoors, please use a rain guard to protect the sensor from rain and direct
sunlight. Please
to buy this accessory.
Summary of Contents for Lidar People Counter
Page 2: ...Daviteq Optical Sensing Technologies...
Page 8: ...Daviteq Radar Sensing Technologies...
Page 9: ...Daviteq Gas Detection Technologies...
Page 27: ......
Page 34: ......
Page 38: ...C m u n i M12 v o c m bi n Si t ch t k t n i M12...
Page 43: ...Daviteq Electrical Sensing Technologies...
Page 51: ...Daviteq Ultrasonic Level Distance Measuring Technologies...
Page 57: ...Thermal mass flow Pitot tube Orifice plate Daviteq Air Gas Flow Measurement Technologies...
Page 64: ...Figure 12 Adjust the orientation of the probe 5 7 Attach the Wireless Transmitter to the probe...
Page 67: ...Daviteq Inertial Measurement Technologies...
Page 80: ...Daviteq Pressure Measurement Technologies...
Page 87: ...Tel 84 28 6268 2523 4 ext 122 Email info daviteq com www daviteq com...
