Drinking water flow monitoring

Customer

Our customer collects water from water wells, fountains & springs and distributes this drinking water to ±2.000.000 inhabitants in a large area located in central Germany. Amongst the delivered cities are Frankfurt, Wiesbaden and Darmstadt.

Task definition

• Installation & commissioning has to be done in existing pipe and valve without flow shutdown
• Installation shall be quick and easy
• Pipe size: 1000 mm
• Very accurate flow rate needed
• Measurements are compared to a full bore electromagnetic flowmeter located in the same waterline

Solution

• Installation of a TORPEE-MAG 1,5” full pipe multi-point electromagnetic flowmeter allowing installation through a 2” ball valve without shutting down the flow
• The TORPEE-MAG is connected to a stationary converter, the ML210, displaying all information on a LCD screen and transmitting the data via 4-20 mA to the SCADA system of the customer
• No calibration on site necessary

Installation

• The total duration for the installation and commissioning including tests for data transmission and cabling of the outputs was around 90 minutes

Measuring point

• 4 m downstream of a 90° pipe elbow with diameter reduction

Sensor

• Sensor for a DN1000 pipe with 5 pairs of electrodes
• Total sensor length is 1800mm

First values

• Measuring data from TORPEE-MAG and full bore mag meter show very little differences
• For the total test duration, the average difference between meters is 1,14%
• The performance of the TORPEE-MAG is outstanding, taking in consideration that the sensor is installed close to a pipe elbow