Chemical Engineering October 2020 - 19

A new way to calibrate
ultrasonic flowmeters
AperCal is a new calibration rig for
this company's clamp-on ultrasonic
flowmeters (photo). This new offering
enables flowmeter users to conduct
autonomous calibrations at their own
sites. Typically, calibration consists of
a comparison of the device under test
with a reference instrument on a wetflow
calibration rig. However, the flow
profile in every flow rig is influenced
by pipe characteristics and installation
conditions, leading to uncertainty. The
patented, traceable aperture-calibration
method eliminates uncertainties by
defining the calibration process on the
basics of clamp-on ultrasonic flow measurement
according to the transit-time
principle. AperCal produces the same
effect, without flow,
through defined
displacement of the transducers. This
reduces the calibration procedure to the
measurement of length and time, both
of which can be performed with high
levels of precision. - Flexim GmbH,
Berlin, Germany
www.flexim.de
High-performance footwear
provides layers of protection
The Philadelphia Wellington heavyduty
workboot (photo) is built to withstand
tough work environments, while
also keeping feet comfortable. The
Philadelphia Wellington features a fullgrain,
waterproof leather to help resist
the damaging effects of many chemicals,
including oleic acid, urea, sodium
chloride, ammonium hydroxide and
more. The boots are designed with left
and right asymmetrical, non-metallic
carbon-fiber toes, which are said to be
15% lighter than steel. The outer sole is
oil- and slip-resistant, and it also heatresistant
up to 300°C (572°F). Furthermore,
electrical-hazard- or electricshock-resistant
footwear provides
a secondary source of protection in
case the user accidentally comes into
contact with live electrical circuits. The
boots are also equipped with a polyurethane
midsole and are lined with a
moisture-wicking mesh textile. - Keen
Utility, Portland, Ore.
www.keenutility.com
■
Mary Page Bailey and Gerald Ondrey
Keen Utility
Flexim
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OCTOBER 2020
6/2/20 5:09 PM
19
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Chemical Engineering October 2020

Table of Contents for the Digital Edition of Chemical Engineering October 2020
