Danfoss A/S, (AC-DSL / MWA), 04 - 006
RD8AA50
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DKRCI.PD.SC0.A1.0 / 50H009
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Technical leaflet
Liquid level transmittter, type AKS 41 / 41U
Introduction
AKS 41 / 41U liquid level transmitters are used to
measure the liquid level in refrigerant vessels.
The AKS 41 / 41U transmits an active 4-0 mA
signal which is proportional to the refrigerant
liquid level.
Special features
”Plug and Play”:
no calibration required.
Service friendly:
electronic head and sensor tube can be
separated without emptying the standpipe.
Damping of output signal available.
Supply voltage and load:
4 V a.c, –15% / +5%, 50/60 Hz
4 V d.c, ±10%
1.5 W
Signal output:
4-0 mA
Refrigerants:
AKS 41 / 41U supports the following refrigerants:
R717 (factory setting)
R
R404A
R134a
R744
R718 (H
O) - R717 and R718 will give the same
AKS 41 output
Temperature range:
–60/+100°C (–76/+1°F)
When used in refrigerant above +60°C
(140°F), a Min. Calibration must be
carried out after 1 week of operation.
Subsequently only a Min. Calibration
once a year is needed.
Pressure range:
The AKS 41 / 41U is designed for:
Max. working pressure: 100 bar g (1450 psig)
Connection:
Pipe thread ISO 8/1 - G 1A or 3/4 " NPT
Max. load resistance:
500 ohm
Ambient temperature:
During operation: –5 to +55°C (–13/+131°F).
During transport: –40 to +70°C (–40/+158°F).
Enclosure:
IP65
Connection:
4-pole plug (DIN 43650)
Approvals:
EMC directive 89/336/EEC
EMD directive 9/31/EEC
EN 50081-1
EN 5008-1
Material:
Thread:
Stainless steel. AISI 303
Reference pipe:
Stainless steel. AISI 304
Inner electrode:
PTFE
Electronic top part:
Cast Aluminium
Technical data
Improved calibration:
AKS 41 / 41U range/signal output can be
adapted to suit the actual application.
AKS 41 / 41U can be supplied with a LED
Bargraph indication of Liquid Level, as option
The 4-0 mA signal from AKS 41 / 41U can be
used in conjunction with a controller to control
the refrigerant liquid level.
The Danfoss EKC 347 liquid level controller, is a
dedicated controller for use with the
AKS 41 / 41U.
