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World's smallest VOC sensor module with Bluetooth low energy wireless connectivity

20.10.2014 16:30

(Low Power)²

Unitronic will present for the first time at electronica 2014 in Hall A4, Booth 466 an extremely compact, battery-operated ultra-low power wireless sensor module for the measurement of volatile organic compounds (VOCs) in the air. The Unitronic Sensor Module USM-BLE-VOC is equipped with a long-term stable miniature MEMS gas sensor, an additional sensor for humidity and temperature, and a Bluetooth low energy (BLE) module. The USM-BLE-VOC has dimensions of only 40 mm x 25 mm x 5 mm, operates from 3 V and features especially low power consumption.

With a typical measurement and transmission cycle of 30 seconds, the current consumption is less than 320 µA. In addition, further power save modes were implemented, which can reduce the current consumption down to less than 260 µA for measurement and transmission cycles at somewhat longer time intervals.

The world’s smallest wireless gas sensor module of its kind combines a high-precision, long-term stable TGS8100 miniature MEMS sensor from Figaro Engineering with a BlueMod+S Bluetooth low energy module from Stollmann. In order to optimize the power consumption for the respective application, the transmit power of the module can be adapted via software from -23 dBm to +7 dBm.

The USM-BLE-VOC is suited for a wide range of applications. For example, in combination with a climate control device, a ventilation control for work spaces can be realized that automatically reacts to pollutants and unpleasant smells. Another simple application is, for example, controlling a bathroom fan. The wireless sensor module communicates with a central control unit via Bluetooth v4.0 single-mode low energy wireless technology, and thus ensures that the fan is only activated when the air is contaminated or the humidity is too high.

In the M2M communications sector, Unitronic offers a wide range of individual and modular combinable technologies and services for further processing of the data provided from the sensor module. Besides integration of the necessary hardware and software in existing or new applications, for example, service and maintenance tasks can also be carried out. In addition, Unitronic offers ready-made solutions for visualization of measurement values on the basis of web platforms, with which monitoring from everywhere is possible.

Many years of experience in the communication and sensor technology sectors shorten the development time when implementing various Internet of Things (IoT) solutions. The primary objective of Unitronic is to provide customers with genuine added value.

Detailed information about the Unitronic Sensor Module USM-BLE-VOC as well as the complementary portfolio of products and services in the M2M communications sector can be requested by sending an email to

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