The Detectronic Model 606 is a legacy workhorse in the world of ultrasonic flow measurement. Known for its reliability in monitoring open channels and sewer systems, finding a for this specific unit can be a challenge as newer digital models take over the market.
“Restart the logger.” From verified manual (Section 7.2): The 606 requires a 2G or 3G SIM (4G not supported). Also, the manual lists exact AT commands for the internal SIM800 module. To force a re-registration, send AT+COPS=0 via the serial debug port – a procedure never mentioned in pirated manuals. detectronic model 606 manual verified