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2
Product Description
This section covers the reference and specification data, as well as ordering information.
2.1
Introduction
Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter is a completely non-invasive
Ultrasonic Flow Meter. The flow meter uses the ultrasonic signal to measure the flow rates
with the transit time method. It consists of the built-in data logger for over 2000 lines of
data and is optional as an external data logger. Tek-Clamp 1200A-100H has a pair of
transducers capable of measuring flow rates in pipes from 1/2" (12.5 mm) to 28" (700 mm)
at temperatures of between 32 °F (0 °C) to 320 °F (160 °C). This flow meter can be virtually
applied to a wide range of measurements. A variety of liquid applications contain potable
water, cooling water, river water, raw sewage, reclaimed water, plant effluent, ultra-pure
liquids, chemicals.
2.2
Measuring Principle
When the ultrasonic wave is transmitted through the flowing liquid, the difference
between the upstream and downstream transit time (travel time or time of flight) can be
calculated, which is proportional to flow velocity.
Fig 1: Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter
The Tek-Clamp 1200A-100H has been developed to measure the flow velocity of liquids in
pipes. The non-contact transducers/sensors are placed on the pipes and thus not subject
to wear and tear. The Tek-Clamp 1200A-100H works with two signal transducers (sensors)
that serve as ultrasonic transmitters and ultrasonic receivers. The sensors are installed on
the outer wall of the pipe at a defined distance, one below the other. The sensors can be
installed in Z shape (Z method). In this case, the ultrasound will pass through the pipe once.
The ultrasound will pass through the pipe four times if the sensors are installed in W shape
(W method). When using the Z method, the sensors are placed opposite to each other.
