Danfoss AKS 4100U liquid level sensor, Cable version, 5 m (197 in) probe, 3/4 in NPT, HMI display EN/DE/FR/ES, guided-wave TDR, 4–20 mA

Danfoss AKS 4100U guided-wave (Time Domain Reflectometry) liquid level sensor, code 084H4521, cable version. Continuous refrigerant liquid-level measurement in receivers, standpipes, intermediate coolers, oil pots and pressure vessels. 5 m (197 in) stainless-steel cable probe with counterweight, field-cut to any length from 800 mm (31.5 in) to 5000 mm (197 in). Process connection 3/4 in NPT. With integrated HMI display unit, language set English (default) / German / French / Spanish. 2-wire loop-powered 4–20 mA output proportional to liquid level; unaffected by foam, vapour, boiling surface, density change or dielectric-constant change. Max. working pressure -1 to 100 bar (-14.5 to 1450 psig); medium temperature -60 °C to +100 °C; ambient -40 °C to +80 °C; enclosure IP66/67 (NEMA 4X housing / 6P probe). The cable version is for R717 (ammonia), HCFC and HFC with liquid dielectric constant εr > 5.6 and must be installed in a standpipe. Wetted parts stainless steel 1.4404/316L and 1.4401/316; EPDM gaskets. EAN 5702428415002. OEM P/N 084H4521.

Type

Danfoss AKS 4100U

Code number

084H4521

Product group

Liquid level sensors

Measuring principle

2-wire loop-powered level transmitter; guided-wave radar / Time Domain Reflectometry (TDR)

Design

Cable version

Probe

5 m (197 in) stainless-steel cable + counterweight; adaptable 800 mm (31.5 in) to 5000 mm (197 in); install in standpipe

Process connection

3/4 in NPT

Output signal

4–20 mA, 2-wire loop-powered (3.8–20.5 mA acc. to NAMUR NE 43)

Supply voltage

14–30 V DC (16–30 V DC at ambient below -20 °C)

Error signal

NAMUR NE 43 — High 22 mA / Low 3.6 mA (default error output 3.6 mA)

Temperature drift

typ. 75 ppm/K

Terminals

0.5–1.5 mm² (~20–15 AWG), spring-loaded

Max. working pressure

-1 to 100 bar (-14.5 to 1450 psig)

Medium (refrigerant) temperature range

-60 °C to +100 °C (-76 °F to +212 °F)

Ambient temperature range

-40 °C to +80 °C (-40 °F to +176 °F); with HMI -20 °C to +60 °C

Storage temperature

-40 °C to +85 °C

Enclosure / protection

IP66/67, equivalent to NEMA type 4X (housing) / type 6P (probe)

Vibration resistance

EN 60721-3-4 (1–9 Hz: 3 mm; 10–200 Hz: 1 g; 10 g shock half-wave sinusoidal, 11 ms)

Housing material

aluminium

Wetted / probe material

stainless steel 1.4404 (316L) and 1.4401 (316)

Gasket material

EPDM (-50 °C to +150 °C)

Cable gland

1/2 in NPT

Display / HMI

integrated LCD 128×64 px, 8-step greyscale, 4-button keypad; languages EN (default), DE, FR, ES

Refrigerants

R717 (ammonia), HCFC, HFC (εr,liquid > 5.6)

Application

continuous liquid-level measurement in refrigeration receivers, standpipes, vessels, intermediate coolers and oil pots

Net weight

2.3 kg (gross 3.62 kg)

Approvals

CE; PED 2014/68/EU (Art. 4, par. 3); CRN (TSSA); China RoHS

EAN

5702428415002

Size / Series

5 m (197 in) cable

Material

Stainless steel 1.4404/316L, 1.4401/316; aluminium housing

Thread Standard

3/4 in NPT

Pressure Rating

-1 to 100 bar (-14.5 to 1450 psig) MWP

Temperature Range

-60 °C to +100 °C medium, -40 °C to +80 °C ambient

IP Rating

IP66/67

HS Code

9026.10