Electricity and Control April 2020

MEASUREMENT + INSTRUMENTATION : PRODUCTS + SERVICES

Level measuring device with wireless communication KELLER has introduced the new ADT1, a robust level measuring device that sends measurement data via LoRaWAN (a low power, wide area (LPWA) networking protocol designed to wirelessly connect battery operated ‘things’ to the internet in regional, national or global networks). The compact, water-tight stainless steel housing contains electronics that are powered by three conventional AA batteries. The batteries provide enough power for five years of operation at a transmission interval of 10 minutes. For non-borehole applications the ADT-1 Box is available as well.

installation work. A PA-26X or 36XW (CTD) level sensor (RS485 interface) or a PA-26D level sensor (I2C interface) can be connected. Cable lengths of up to 250 m can be used, which makes the system ideal for level measurement in boreholes and tanks. The ADT1 has an integrated barometer sensor for barometric compensation of the measured values. It also outputs the air temperature and the humidity – measured inside the housing – as measured values. The humidity level is an indication of possible leaks in the ADT1, alerting users at an early stage to the need for appropriate actions to be taken, before the device fails. The ADT1 is operated using the cloud measurement solution kolibricloud.com from KELLER. A detailed interface description is available for other software environments. Other versions of the ADT1 with ATEX approval and with NB-IoT wireless transmission, are under development. KELLER measurement devices are available from Instrotech.

Users without a LoRaWAN network but who have an internet connection, can create their own local LoRa network with a simple LoRa Gateway. The ADT1 model can be used in monitoring pipes/ cap locks of two inches or larger and can be suspended at the measuring point without the need for extensive

The new ADT1 is a compact, robust,

battery-operated level measuring device that sends measurement data via LoRaWAN, or user-created local network, ideal for level measurement in boreholes and tanks.

For more information contact Instrotech. Tel: +27 (0)10 595 1831, email: sales@instrotech.co.za

Electricity + Control APRIL 2020

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