The Intelligens Flow is a flow monitoring system designed for use in a variety of wastewater applications including foul, combined and storm water sewers. Fitted with an integral GSM/GPRS or 3G modem and certified to ATEX/IEC Ex Zone 1, it can also be used for general applications including open channel, river/stream and outflow. Suited to both permanent and short term flow surveys, the components are fitted to a rugged stainless steel 316 framework which both protects the equipment and allows for easy installation and transport.

The system records data using a combination of sensors. The mean velocity is determined using a Doppler-effect sensor located in the stream flow. This emits an ultrasonic beam which is reflected by particles or bubbles in the water. The recorded signal is analysed and the frequency shift determined. The integral temperature probe then allows for speed of sound corrections to be applied and the velocity derived.

The advanced sensor also monitors and reports signal quality to allow for remote diagnostics and troubleshooting. Water depth is recorded using a piezo resistive probe. Alternatively, the level can be recorded using the Sonic Sens 2 ultrasonic level sensor. Level to area conversion tables are automatically calculated during the commissioning phase. This information is then used to derive the flow both on-site and/or at the data collection server.

The Intelligens data logger is housed in an IP68 enclosure and  fitted with an integral 2G or 3G modem and user replaceable battery pack allowing for 5+ years data collection and transmission under standard conditions. The large capacity external battery pack powers the Doppler sensor and allows for 2 years operation (at a 2 minute logging rate) or 5 years (at a 15 minute logging rate). An advanced alarm regime can be configured for each channel. Threshold conditions can also be set which will trigger faster logging and accelerated data transmission during alarm conditions.