EESIFLO International has obtained a license to manufacture CTT flowmeters. The meters use a patented technology which is markedly different from conventional time of flight measurement techniques.  The whole purpose of the CTT patent was to manufacture an ultrasonic flowmeter that used few components and that was accurate in clean liquid conditions. Currently, there are flow meters in the market that meet the criteria of accuracy and repeatability in many conditions but they use many components and are expensive to fabricate and calibrate.

  The CTT patent is used to  maintain accuracy in normal operating conditions where changes in temperature are present. The CTT technique  (concurrent transit time)  has already been used in EESIFLO’s range of flow tubes designed to measure low flow. In early  2007, the company began building prototypes for full bore applications starting with versions in 1 to 4 inches with favourable results.

The CTT full bore prototype units have been tested against highly accurate electromagnetic flowmeters in test laboratories. These are simple units that have an LCD display and a 4-20mA output. They are currently configured through an RS 232 port  . The following graphs are examples of some of the test data obtained.  These were comparisons between un-calibrated CTT meters and calibrated electromagnetic flow meters on clear water.