Page 41 - EngineerIT September 2022

NEW PRODUCTS AND SERVICES

Pressure sensors for perfect coffee

offee is one of the world’s most through the layer of swollen coffee
consumed drinks, which is why it grounds and a highly concentrated
Cis no surprise that so many coffee coffee is produced. The light cream
machines can be found where people foam on the surface of the coffee
live and work. Coffee from bean-to-cup comes from the coffee oils released
machines is enjoyed most often. through this process. AMSAT SA
Bean-to-cup coffee machines are Space Symposium 2022
devices that can produce a range of coffee No pressure, no coffee Saturday 10 September 2022
types completely automatically. A fully Pressure is essential for an aromatic This is a hybrid event at the Premier
automatic machine comprises a grinder, an coffee. Within the brewing assembly Hotel, Midrand and virtually on the
instant water heater, a pump and a brewing and during coffee production, specific BlueJeans platform
assembly. In addition to making coffee, pressure is used in most bean-to-cup www.amsatsa.org.za
some bean-to-cup machines are equipped machines. In order to create this
with extra modules that use steam to heat pressure, it is paramount that the
up and foam milk. built-in pump carrying the hot water Electra Mining Africa
The grinder has the task of producing into the brewing chamber produces 5 – 9 September 2022
freshly ground powder from whole coffee a high pressure itself. The reason for Johannesburg Expo Centre
beans. A mobile piston then transports this this is that the pressure reduces over
to the brewing chamber which is part of the course of the process. In order to
the brewing assembly and therefore the guarantee this system, it is necessary Africa Automation
heart of the machine. Hot water from the to install sensors. The sensors do Technology Fair 2023
instant water heater is transported by a more than measure the steam
9 – 11 May 2023
pump which is connected to the brewing pressure – they also regulate the Johannesburg Expo Centre
assembly. temperature of the water. A sensor
The coffee grounds and the hot is also required to prevent over- (NASREC)
water are combined within the brewing pressure. Should over-pressure occur, Africa Automation Fair
assembly. In order to produce the coffee, a valve is switched, allowing the (africaautomationtechnologyfair.com)
the coffee grounds are first pre-brewed, steam to escape.
where they are moistened with a small Swiss manufacturer Rex-Royal
quantity of water at low pressure and AG makes these bean-to-cup coffee
swell up, allowing the flavours to be machines and continuously develops
released. Then, the chosen quantity new products and technologies
of hot water is forced at high pressure for perfect coffee. Rex-Royal has
sourced pressure transducers from
KELLER’s 21C series for their S300
model range. Alongside the pressures
described above, these pressure
transducers also measure and
control the temperature of the milk
heated, to make latte macchiato and
cappuccino coffees. With Rex-Royal’s
professional coffee machines, the
perfectly brewed coffee is no longer
out of reach.

Contact INSTROTECH for more ADVERTISING CONTACT:
information on Keller’s pressure Tarryn Bester
transducers from the 21C series Cell: 072 265 6579
for the food and beverage Email: tarrynb@eiapublishing.co.za
industry on 010 595 1831 or
sales@instrotech.co.za or www.engineerit.co.za
https://bit.ly/3NU5zgc

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