ULTRAFLOW® 54 DN15-125
Kamstrup A/S · Technical description · 5512-2464_D1_GB_09.2021
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1
Introduction
1.1
Pioneering work and continuous development
Since 1991 Kamstrup has provided static ultrasonic flow sensors for heat meters and is among the pioneering
manufacturers of this technology. The stand-alone flow sensors ULTRAFLOW® are the trademark of the Kamstrup static
flow sensors based on the ultrasonic measuring principle. The proven long-term accuracy and durability have gained our
flow sensors a reputation of reliability and quality. Ongoing development has continuously improved the whole
performance of Kamstrup flow sensors. The pressure loss has, for example been continuously reduced, while the dynamic
range could still increase. Furthermore, various smart features like the ability to mount a temperature sensor in the outlet
of flow sensors with sizes up to qp 10 m³/h have been added.
1.2
Modular meter set-up for maximum flexibility
ULTRAFLOW® is known as a separate static flow sensor. The modular composition of our heat and cooling meter set-up
consisting of separate flow sensor, calculator and temperature sensor set adds degrees of flexibility to your installation,
thereby accommodating most needs. In cases where separation of flow sensor and calculator is required during
installation, the cable to the calculator can easily be disconnected and connected again. This cable between calculator
and flow sensor is in most cases also comparatively easily changeable, underlining the intelligent and easy-to-handle
design of Kamstrup products. In addition, you can exchange only one of your sub-assemblies, which minimises unforeseen
costs in case of a calculator upgrade or replacement of either part. The split meter solution allows cable lengths of 2.5 m,
5 m and 10 m as standard and enables even extra-long cables of up to 110 m to MULTICAL®. For further information
about our separate calculators MULTICAL® 603 and MULTICAL® 803, please consult Kamstrup doc. no. 5512-2029_GB
and 5512-2360_GB.
Whether you choose to install the separate ULTRAFLOW® or the flow sensors connected to our compact calculators, you
can be assured by the fact that all our flow sensors are based on the same platform. The ULTRAFLOW® technology has
been utilised in the basic design of our other flow sensors integrated in our compact meters like MULTICAL® 303 and
MULTICAL® 403 ensuring equally proven accuracy, durability and serviceability. For further information about our
compact meters MULTICAL® 303 and MULTICAL® 403, please consult Kamstrup doc. no. 5512-2701_GB and 5512-
1689_GB.
1.3
General description
The flow sensor program ULTRAFLOW® 54 DN15-125 is particularly designed for heat meters in combination with
MULTICAL® 603 and MULTICAL® 803 and a set of TemperatureSensor 63 or 83. The flow sensors are available in a wide
range of sizes from DN15 to DN125 and flow rates from qp 0.6 m³/h to 100 m³/h. In its segment it is your preferred choice
for heating installations where water is the heat-bearing medium. The static flow sensors DN15-DN125 with threaded
meters of brass or flanged meters of stainless steel come with a compact and rational design where the electronics is
close to the transducers and thereby an integrated part of the meter housing. Depending on the sensor size, specific flow
conditioners and different ultrasonic paths (U-path and triangular path) ensure a correct measurement within the
working range of the flow sensor.
ULTRAFLOW® employs microprocessor technology. The flow is measured using bidirectional ultrasonic technique based
on the transit time method. All circuits for calculating and measuring are collected on a single board, providing a compact
and rational design in addition to an exceptionally high level of measuring accuracy and proven long-term stability. A
three-wire signal cable is used to connect ULTRAFLOW® directly to separate MULTICAL® calculators by a cable with a
length of up to 10 m. This cable is used to supply the flow sensor from the calculator and also to send volume proportional
pulses to the calculator.
When there is a need to extend the cable between ULTRAFLOW® and MULTICAL®, a Cable Extender Box can be used,
which is mounted between ULTRAFLOW® and MULTICAL® to extend the cable length up to 30 m. Note that ULTRAFLOW®
and MULTICAL® in these cases are galvanically connected. If ULTRAFLOW® shall be connected to other equipment, it
must normally be connected through a Pulse Transmitter. If ULTRAFLOW® is connected to a another calculator with a
different meter factor than the one supplied by ULTRAFLOW®, a Pulse Divider is used instead. Pulse Transmitter and Pulse
Divider are available with built-in supply for ULTRAFLOW® and the pulse outputs of both Pulse Transmitter and Pulse
Divider are galvanically separated. In addition, Pulse Transmitter and Pulse Divider enable a cable length of up to 110 m
between ULTRAFLOW® and MULTICAL®, which is required in some installations.
