The use of Danfoss AKS4100-U (084H4520) cable type liquid level sensor

The AKS4100 / 4100U liquid level sensor uses reliable time-domain reflectometry (TDR) or guided radar technology and is specifically designed to measure liquid levels in refrigeration systems. The AKS4100 / 4100U liquid level sensor can be used to measure the liquid level of many different refrigerant containers, gas-liquid separators, liquid reservoirs, risers, etc. The output electrical signal is 4-20mA powered by a 2-wire loop, which is proportional to the refrigerant level. The AKS4100 / 4100U cable version is suitable for most refrigerants, including ammonia, freon, and non-corrosive gases / liquids other than carbon dioxide. The measurement length ranges from 800mm (31.5in.) To 5000mm (197in.). The AKS4100 / 4100U coaxial version is designed for use in carbon dioxide systems. It can also be used in other commonly used refrigerants. Regardless of the refrigerant used in marine applications, the AKS4100 / 4100U coaxial version must be used. The AKS4100 / 4100U cable version must not be used in carbon dioxide systems or marine applications.
Dust, foam, gas, boiling liquid surface, liquids of different densities or different dielectric constants will not affect the performance of AKS4100 / 4100U. The oil accumulated at the bottom of the riser will not interfere with the level signal, so there is no need to remove the AKS4100 / 4100U sensor and then drain the oil in the riser.

Features of Danfoss AKS4100-U (084H4520) cable type liquid level sensor

Can cover a wider measurement length (cable version)
■ Can be applied to all conventional refrigerants (cable version)
■ Cable version sensor requires less installation and maintenance height
Directional space reserved
■ The lubricant contained in the refrigerant does not affect the measurement accuracy
■ When the lubricant is completely covered, there is no need to clean the sensor
■ The compact design of the cable version is convenient for transportation and installation.
For different lengths and various refrigerants
■ Changing the liquid dielectric constant will not affect the system measurement
■ Cable version: 5000mm (197 in.) Length
■ Two-wire loop power supply, no need for independent transformer
Please note:
AKS 4100 / 4100U and Danfoss EKE 347 level controller
Can share power with it when connected
If connected to EKE 347 level controller, 14-
30 V dc independent power supply
■ Man-machine interface display
HMI can provide Chinese operation interface and can set mm, cm,
m length unit

Supply voltage
14-30 V d.c. min / max terminal maximum output is 22 mA
Ambient temperature power supply voltage limit:
-40 ℃ / + 80 ℃ (–40 ℉ / + 176 ℉): 16-30 V d.c.
-20 ℃ / + 80 ℃ (–4 ℉ / + 176 ℉): 14-30 V d.c.
load
RL [Ω] ((Uext -14 V) / 20 mA).
-Default (error output is set to 3.6mA)
RL [Ω] ((Uext -14 V) / 22 mA).
-Default (error output is set to 22 mA)
Cable jacket
AKS 4100 PG 13, M20 × 1.5;
Cable specification 6-8mm (0.24-0.31in.)
AKS 4100U ½in.NPT
Refrigerant temperature
–60 ℃ / 100 ℃ (–76 ℉ / 212 ℉)
Ambient temperature
–40 ℃ / + 80 ℃ (–40 ℉ / + 176 ℉)
HMI: –20 ℃ / + 60 ℃ (–4 ℉ / + 140 ℉)
Working pressure range
–1 barg / 100 barg (–14.5 psig / 1450 psig)
Terminals
0.5-1.5 mm² (~ 20-15 AWG)
Protection level
IP 66/67 (~ NEMA type 4X)
Mechanical connection
Cable version / Coaxial version
AKS 4100: 1 "pipe thread. Aluminum gasket included
AKS 4100U: ¾in NPT
The refrigerant
Applicable refrigerants approved by Danfoss
Ammonia –40 ° C / + 50 ° C (–40 ° F / + 122 ° F)
Carbon dioxide –50 ° C / + 15 ° C (–58 ° F / + 59 ° F)
Freon R22 –50 ℃ / + 48 ℃ (–58 ℉ / + 118 ℉)
R404A –50 ℃ / + 15 ℃ (–58 ℉ / + 59 ℉)
R410A –50 ℃ / + 15 ℃ (–58 ℉ / + 59 ℉)
R134A –40 ℃ / + 50 ℃ (–40 ℉ / + 122 ℉)
Out of range will affect the measurement accuracy
Other Freon refrigerant testing follows the following rules:
Reference conditions
Dielectric constant
Cable version for ammonia and freon
Liquid εr,> 5.6
Coaxial version is mainly used for carbon dioxide
Liquid εr> 1.3 and marine applications can also be used for ammonia and Freon
Coolant