Consumption

Consumption table

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

Low consumption mode

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.