MAKING MODERN LIVING POSSIBLE
© Danfoss A/S (AC-MCI/MWA), 2012-05
DKRCI.PD.SC0.C3.02 / 520H5687 1
Technical brochure
Liquid Level Sensor
AKS 4100/4100U
The AKS 4100/4100U liquid level sensor is designed
specifically to measure liquid levels in a wide range of
refrigeration applications.
The AKS 4100/4100U liquid level sensor is based
on a proven techhology called Time Domain
Reflectometry (TDR) or Guided Micro Wave.
AKS 4100/4100U liquid level sensor can be used to
measure the liquid level of many different refrigerants
in vessels, accumulators, receivers, standpipes, etc.
The electrical output is a 2-wired, loop powered
4-20 mA output signal, which is proportional to the
refrigerant liquid level.
AKS 4100/4100U in a cable version is suitable
for most commonly used refrigerants, including
R717(ammonia), HCFC, HFC and non corrosive gases/
liquids except CO
2
, and differing lengths from 800
mm(31.5 in.) and up to 5000 mm (197 in.).
The coaxial version of AKS 4100/4100U is designed for
use with CO
2
. It can also be used for all other appoved
commonly used refrigerants.
The AKS 4100/4100U coaxial version should always
be used for marine applications for all refrigerant
types.
The AKS 4100/4100U cable version should NOT be
used for CO
2
or marine applications.
Dust, foam, vapour, agitated surfaces, boiling
surfaces, changes in density or in the dielectric
constant , εr, for the liquid have no influence on the
AKS 4100/4100U performance.
Oil accumulated in the bottom of a standpipe will not
disturb the liquid level signal and it is not necessary
to remove AKS 4100/4100U for cleaning after oil has
been drained out of the standpipe.
AKS 4100/4100U - Coaxial Version
AKS 4100/4100U - Cable Version
Features
Approved and qualified by Danfoss for
refrigeration applications
One product covering several probe lengths
(cable version)
A single product for all commonly used
refrigerants (cable version)
Cable version requires less top-end clearance
for installation and service
Proven operation with all refrigerants in
combination with oil.
No need to clean cable version when fully
covered by oil.
The cable version is very compact and easy
to handle, ship, install and use with different
lengths and refrigerants
Changes of the liquid dielectric constant (εr)
do not affect operation.
5000 mm (197 in.) probe length with cable
version
2-wire loop powered; no separate transformer
needed.
Please Note:
If used together with Danfoss EKC 347 Level
Controller, a 14-30 V d.c supply is required.
Multi language HMI.
Level and setting readout in mm,cm,m( ft, in.)
For further details regarding mechanical and electrical installation please refer to the product
instructions PI.SC0.D (CABLE version) and PI.SC0.E (COAXIAL version).