Main advantages of the WiFi types over the PoE types:
The sensor housing contains an analog section, a digital signal processing unit and a web server. The analogue part ANALOG amplifies the sensor signal and forms the logarithmic envelop for data reduction. AE parameters such as arrival time, rise time, duration, peak amplitude and energy are extracted from the envelope by the digital signal processing unit PARAM. In parallel to the parameter extraction, the waveform of the envelope can be recorded. The web server generates dynamic web pages to control the sensor and to display the measurement results. Units RX and /TX establish the connection to the network.
The highest energy consumption at 1.2 W has the WiFi transmit block (TX). However, this block is only active when data is actually being sent. Low hit rates also mean low energy consumption. The necessary range and the activities of other users in the 2.4 MHz band also have an impact on energy consumption since the transmission power is automatically reduced with good reception. The lithium battery allows operating times of at least 8 hours. 24 hours are achieved at low hit rates.
For the L types you will find the functional description and location examples under tab Products ⁂ Mid Device.
Possibilities for self-sufficient power supply are described in Service ⁂ Overview.