When Michell Instruments needed
to upgrade its compressed air supply
to meet expanded capacity at its
factory in Ely, it chose to install oilfree
compressor and dryer solutions
from Atlas Copco.

Michell Instruments manufactures
transmitters, instruments and
systems capable of measuring dew
point, humidity and oxygen in a
variety of applications and industries.

Its production and calibration
processes are dependent upon a
continuous supply of quality
compressed air and over the past 10
years, as the company’s production
and calibration facility has expanded,
Atlas Copco has matched this growth
with oil-free compressor solutions.

The most recent addition, an oilfree
ZT22 compressor and two CD
dryers, supplied and installed by
Anglian Compressors and Equipment,
underlines the fact that air quality is
vital to the calibration procedures.

Graham Daines, calibration
laboratory manager, explains: “The
calibration systems use pressure
swing dryers to achieve the -100°C
dew point air and require the air
supplying them to be dry and oil
free. We cannot risk contaminating
the calibration systems or the sensors
we calibrate. This is why we have
never considered oil lubricated
compressors with oil filtration.”