Abnormally low pressure readings with environmental sensor

Hardware
1

Hi,

I’m using a new PR49-24L environmental sensor and generally it’s working well, but the pressure readings are abnormally low. I have it outside near my weather station, reporting values to MQTT via a gateway. The MQTT messages show a “pressure” value of “898” (hPa according to the docs) / 26.51inHg. When I started the sensor up 12+ hours ago, it was reporting 896.

898 / 26.51inHg is way low - my weather station currently reports 30.40, much more reasonable.

Is there something I need to do to calibrate the pressure sensor on the unit?

2

the sensor element used in this product is BME680 and it does not allow any user calibration.

The sensor error rate is around ± 0.25 % (equiv. to 1 m at 400 m height change).

Thanks

3

Thanks for the part number. According to the Bosch application notes for the BME680, these readings are outside the “plausible value” range of 900-1100.

Seems like I have a bad sensor?

4

Hi Adam,
Yes, its possible.,

You can send it for an RMA.

ps - BME680 is on backorder and if we need to replace the sensor it will take around 6-8 weeks.