Bosch Sensortec | BME690 - Datasheet

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Document number: BST-BME690-DS001-04

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Table 3: IAQ system parameter specification3

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Accuracy status4

AXIAQ

Android compatible

0

3

IAQ Resolution

IAQrs

1

IAQ Range

IAQrg

0

500

Sensor-to-sensor

deviation5

IAQS2S

L ow Power mode

Ultra -low Power mode

±15%

±15

Durability to

siloxanes6,7,8

IAQS2S

Sensor-to-sensor deviation

±15%

±15

IAQdrift

Drift at low & high

concentrations

±1%

±4

3 IAQ parameters only apply for the combination of BME690 together with the Bosch Software Environmental Cluster (BSEC) solution (available for download, see chapter 4)

4 The accuracy status is equal to zero during the power-on stabilization times of the sensor and is equal to 3 when the sensor achieves best performance

5 Tested with 0.6–90 ppm of EtOH at 5–40 °C, 20–80% r.H. and atmospheric pressure. Condition is valid after the calibration period of the BSEC algorithm.

6 Siloxanes are present in a typical indoor environment and can in principle perturb the metal-oxide-based gas sensor performance.

7 220 hours of 700 mg/m3 of octamethylcyclotetrasiloxane (D4) in ambient conditions (i.e. 20 °C and 50% r.H.) simulates the amount of siloxanes in a typical indoor environment over

more than 10 years.

8 Tested with 0.5–15 ppm of b-VOC at 20 °C and 50% r.H. using continuous operation mode for 220 hours of 700 mg/m3 of octamethylcyclotetrasiloxane (D4).