Extensive customer feedback has made us upgrade our bestseller A755 addSDI into Version 2. Now featuring 2 pulse inputs instead of one and two digital I/Os that allow status checks on equipment and even equipment control!

Applications for A755 V2

Here are a few examples:

Soil moisture monitoring:

Depending on the power consumption of your SDI-12 soil moisture sensor you can connect one, two, three or even four SDI-12 soil moisture sensors AND a water meter AND an irrigation gauge to check the proper flow and distribution of water. To see if your pump is ON or OFF A755 v2 also has 2 digital I/O ports for status signals and switching operations.

Water quality monitoring:

Most multi-parameter water quality probes available today rely on SDI-12 as their interface of choice. Many such probes even come with their own internal battery pack, so power consumption is not an issue. For some probes we recommend the use of our A917 Power Booster interface to get to the required levels of supply voltage.

Water level monitoring - flood warning

Radar sensors are increasingly popular with civil protection agencies as they can easily be mounted on existing structures like bridges, thus reducing the cost of installation. One of the best selling products in this regard is the RLS radar sensor from OTT Germany, for which we have developed a little power booster interface to provide sufficient voltage from the RTUs internal battery. To improve on prediction quality you can also connect one or two rain gauges to the RTU.

Read the full article on the A755 addSDI GPRS RTU Version 2!