---
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title: "MB-AQ40-Sxx Active sensor for MODBUS air quality measurement"
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MB-AQ40-Sxx Active sensor for MODBUS air quality measurement

The MB-AQ40 sensors are active microprocessor-based sensors for air quality measurement, available for installation with a design coordinated with the main civil flush-mounted series (BTicino, Vimar, Gewiss, ABB etc.). The VOC index value (from 1 to 500) can be read via Modbus RTU (RS485).

## Technical Features

- Communication parameters are 19200, N, 8, 1;
- the configurable slave address ranges from 1 to 255.
- Inside a 503 box, they occupy 1 position.

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Source: https://shop.marcomweb.it/en/home-automation/mb-aq40-sxx-active-sensor-for-modbus-air-quality-measurement

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