Bronkhorst®
Instruction Manual ES-FLOW™
9.17.145E
7
1
Introduction
1.1
Scope of this manual
This manual covers general product information, installation and operating instructions and troubleshooting tips for the
ES-FLOW™
digital volume flow meter/controller for liquids.
1.2
Intended use
The
ES-FLOW™
has been designed to accurately measure and control low volume flows with high precision and a limited
pressure drop. A wide range of liquids can be measured independent of fluid density, temperature and viscosity.
When ordered as a 3-A compliant instrument, the ES-FLOW™ is suited for hygienic (food processing) applications, Clean-in-
place (CIP) and Sterilization in Place (SIP). The end user is responsible for the selection and application of suitable (FDA-
compliant) sealing materials.
The wetted materials incorporated in the ES-FLOW are compatible with media and conditions (e.g. pressure, temperature)
as specified at ordering time. If you are planning to use the product (including any third party components supplied by
Bronkhorst, such as pumps or valves) with other media and/or other conditions, always check the wetted materials
(including seals) for compatibility. See the technical specifications of the product and consult third party documentation (if
applicable) to check the incorporated materials.
Responsibility for the use of the equipment with regard to suitability, intended use, cleaning and corrosion resistance of the
applied materials against the processed media lies solely with the end user.
Where appropriate, this document recommends or prescribes safety measures to be taken with respect to media usage or
working with the described equipment under the specified conditions. The end user is responsible for taking the necessary
safety precautions and proper use of appropriate (personal) protective equipment, even if such is not explicitly
recommended or required in this document.
The end user is considered to be familiar with the necessary safety precautions, and to comply with the appropriate
protective measures as described in the Material Safety Data Sheets of the media to be used in the system (if applicable).
Bronkhorst High-Tech B.V. cannot be held liable for any damage resulting from improper or unsafe use, use for other than
the intended purpose or use with other media and/or under other conditions than specified on the purchase order.
1.3
Product description
The
ES-FLOW™
is a precise and compact volume flow meter with control function for liquids, based on a novel ultrasonic
technology.
Measuring principle
Measuring is done in a straight tube, without obstructions or dead spaces. Multiple transducers measure both the surface
acoustic wave and the transit time through the media. All up- and down-stream combinations are recorded and processed
in nanoseconds. The sound wave velocity and the surface area are recalculated to the volume flow value. This ultrasonic
measuring method is fast, accurate and inherently bi-directional.