Consumption
In the following table, the consumption shown by the board when active is detailed, the minimum consumption (constant, fixed by the permanently active components, such as the adaptation electronics and the BME280 sensor) and the individual consumptions of each of the sensors connected alone to the board (the total consumption of the board with a determined sensor will be calculated as the sum of the constant minimum consumption of the board plus the minimum consumption of the group to whom the sensor belongs plus the consumption of the sensor).
Remember that the board's power can be completely disconnected, reducing the consumption to zero, powering off all the sensors.
Sensor | Switch on |
Minimum (constant) | 5-10 µA |
Carbon Monoxide (CO) for high concentrations | 351 μA |
Carbon Monoxide (CO) for low concentrations | 312 μA |
Carbon Dioxide (CO2) | 85 mA |
Molecular Oxygen (O2) | 332 μA |
Ozone (O3) | < 1 mA |
Nitric Oxide (NO) for high concentrations | 441 μA |
Nitric Oxide (NO) for low concentrations | < 1 mA |
Nitric Dioxide (NO2) | 335 μA |
Nitric Dioxide (NO2) high accuracy | < 1 mA |
Sulfur Dioxide (SO2) | 333 μA |
Sulfur Dioxide (SO2) high accuracy | < 1mA |
Ammonia (NH3) for low concentrations | 338 μA |
Ammonia (NH3) for high concentrations | 338 μA |
Methane (CH4) and other combustible gases | 68 mA |
Molecular Hydrogen (H2) | 520 μA |
Hydrogen Sulfide (H2S) | 352 μA |
Hydrogen Chloride (HCl) | 341 μA |
Hydrogen Cyanide (HCN) | 327 μA |
Phosphine (PH3) | 361 μA |
Ethylene Oxide (ETO) | 360 μA |
Chlorine (Cl2) | 353 μA |
Particle Matter – Dust | 270 mA @ 5 V |
Table: Consumption for each sensor
From the point of view of optimizing Waspmote resources when the Gases PRO Sensor Board is used, it is recommended to follow the following instructions:
- Optimize the time the sensors are switched on depending on your application
The accuracy of each sensor's measurement will vary depending on the time that the sensor remains powered before reading, or on the power supply cycles which are continually applied, depending on the type of sensor. Knowing the required time to take a measurement in a determined application will allow saving of consumption without losing resolution in the sampled value.