Temperature and relative humidity parameters are
the main indicators of the quality of the indoor
climate of a building. They affect both the health
of occupants and the preservation of products in
storage spaces. The regulation of these
parameters is therefore essential for questions of
health, quality, but also economics. Because the
regulation of these two parameters is the basis of
the energy optimization required by the latest
ecological regulations. It also makes it possible to
detect possible weaknesses in the insulation of a
structure.

For 45 years, Sauermann has been supplying
temperature and humidity sensors whose
reliability is certified ex-factory in our French
laboratories, accredited ISO 17025:2017 for these
two parameters. Sauermann's expertise supports
many establishments in regulating their indoor
air: factories, warehouses, museums, schools,
hospitals, offices, etc.

Differential pressure measurement is primarily
intended for monitoring the proper functioning of
air handling units (AHUs). It is especially
concentrated at the level of air filters and ducts,
where the differential pressure allows the flow
rate of air flows to be calculated.

The filters integrated into the AHUs become
clogged more or less quickly depending on their
filtering power. Constant monitoring is
particularly essential for HEPA and ULPA
antibacterial filters.

Measuring the differential pressure before and
after a filter makes it possible to assess its
clogging and anticipate its replacement as part
of a preventive maintenance plan. This
anticipation consists of scheduling maintenance
interventions at the right time, so as to reduce or
avoid downtime.

Historically specialized in pressure
measurement, Sauermann offers all possible
solutions in the field: connected digital pressure
gauges or liquid column pressure gauges. The
first digital solution allows values ​​to be recorded
over time and remotely, with an audible and
visual alarm, and an integrated display on certain
models. The second analog solution is
particularly resilient because it is completely
autonomous: it does not require energy to
operate, and benefits from record durability.

In the field of air conditioning, monitoring air
speed and flow is essential to verify proper air
circulation within a building. This measurement is
particularly important to check that the air
renewal rate is sufficient in the different areas
concerned.

Air renewal makes it possible to maintain rooms
in a constant climate, in particular to compensate
for the heat production of certain equipment
(machines, power supplies, microcomputers,
etc.). The evacuation of cold, or of chemical
substances released by certain products is just
as important, depending on the places
concerned.

This is why Sauermann offers very advanced
solutions for monitoring and recording the speed
and flow of air in ventilation ducts, both inlet and
exhaust. To calculate in real time the volumes of
air exchanged in ventilated zones, Sauermann
offers a recognized solution: DEBIMO wings.

The concentration of CO2 in indoor air is the
preferred indicator of indoor air quality and
therefore of the air change rate (Air Change Rate
or ACR). It is therefore a measure of choice for
evaluating the overall and final efficiency of a
building's air conditioning system.

CO2 concentration is measured quickly and in
real time, but requires high-end CO2 sensors to
provide reliable results. Sauermann uses the
most reliable technology in the field, with NDIR
(non-dispersive infrared) sensors, and
instruments calibrated internally within the
company's laboratories.

Today, measuring CO2 levels is no longer just
reserved for the most sensitive buildings. It is
strongly recommended in all places open to the
public, particularly schools and offices. A CO2
level of 800 to 1000 ppm is currently
the subject of a scientific consensus to
demonstrate sufficient air renewal to reduce the
concentration of bacteria and viruses in
suspension, in order to mitigate the risks of
biological contamination.