INTRODUCTION
WARNING
POTENTIAL ELECTROSTATIC CHARGING HAZARD. THE NONMETALLIC PART OF THE ENCLOSURE MUST BE CLEANED
WITH A DAMP CLOTH TO ELIMINATE THE RISK OF STATIC ELECTRICITY.
The TFX-5000 transit time meter measures volumetric flow and heating/cooling energy rates in clean liquids as well as those
with small amounts of suspended solids or aeration, such as surface water or sewage. TFX-5000 ultrasonic flow and energy
meters clamp onto the outside of pipes and do not contact the internal liquid.
The TFX-5000 meter is available in two versions:
• A flow meter for water delivery, sewage, cooling water, alcohols, chemical
• A heating/cooling energy flow meter used in conjunction with dual clamp-on RTDs for temperature measurement—ideal
for hydronic process and HVAC applications
Transit time flow meters measure the time difference between the travel time of an ultrasound wave going with the fluid
flow and against the fluid flow. The time difference is used to calculate the velocity of the fluid traveling in a closed-pipe
system. The transducers used in transit time measurements operate alternately as transmitters and receivers. Transit time
measurements are bi-directional and are most effective for fluids that have low concentrations of suspended solids and are
sonically conductive.
Figure 1: Meter operation
An ultrasonic meter equipped with heat flow capabilities measures the rate and quantity of heat delivered or removed from
devices such as heat exchangers. By measuring the volumetric flow rate of the heat exchanger liquid, the temperature at the
inlet pipe and the temperature at the outlet pipe, the energy usage can be calculated.
By applying a scaling factor, this heat flow measurement can be expressed in various units (Btu, Watts, Joules, Kilowatts
and others).
DIMENSIONS
OTE:N Installation instructions begin on page 10.
Remote Enclosure
6.50 in.
(165.10 mm)
6.50 in.
(165.10 mm)
Torque the
cover screws
to 45 in-lb.
3.63 in.
(92.20)
0.90 in.
(22.86 mm)
Figure 2: Remote mount enclosure dimensions
Introduction
Page 6 October 2019TTM-UM-02222-EN-04
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