Danfoss AKS 4100U liquid level sensor, Coaxial version (D14), 762 mm (30 in) probe, 3/4 in NPT, without display, guided-wave TDR, 4–20 mA (084H4525)

Part Number
084H4525 · HS 9026.10

Danfoss AKS 4100U guided-wave (Time Domain Reflectometry) liquid level sensor, code 084H4525, coaxial version (d14). Continuous refrigerant liquid-level measurement in receivers, standpipes, intermediate coolers, oil pots and pressure vessels. 762 mm (30 in) rigid coaxial probe (14 mm / 0.55 in outer stainless tube). Process connection 3/4 in NPT. Without HMI display (configured via a plug-on HMI display unit, ordered separately). 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 coaxial version is mandatory for R744 (CO2) and is the version specified for marine applications; it is also suitable for R717 (ammonia), HCFC and HFC. Wetted parts stainless steel 1.4404/316L and 1.4401/316; EPDM gaskets. EAN 5702428415040. OEM P/N 084H4525.

Technical Specifications

Type

Danfoss AKS 4100U

Code number

084H4525

Product group

Liquid level sensors

Measuring principle

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

Design

Coaxial version (D14)

Insertion (probe) length

762 mm (30 in); coaxial D14 (14 mm / 0.55 in outer stainless tube)

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

without HMI (plug-on HMI display unit ordered separately)

Refrigerants

R717 (ammonia), R744 (CO2), R134a, R404A, R410A, R22 and other non-flammable HCFC/HFC

Application

continuous liquid-level measurement in refrigeration receivers, standpipes, vessels, intermediate coolers and oil pots; coaxial version mandatory for R744 (CO2) and specified for marine applications

Net weight

4 kg (gross 6.908 kg)

Approvals

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

EAN

5702428415040

Properties

Material

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

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

Standard size

762 mm (30 in) probe

Thread standard

3/4 in NPT

MOQ

Compatibility

Loop-powered transmitter — pair with a compatible 14–30 V DC controller/indicator (e.g. Danfoss EKC 347 liquid-level controller) ordered separately. Coaxial version is mandatory for R744 (CO2) and for marine service; confirm probe length, process connection and refrigerant before ordering. Each AKS 4100/4100U must be programmed via an HMI display unit at commissioning.

Danfoss AKS 4100U liquid level sensor, Coaxial version (D14), 762 mm (30 in) probe, 3/4 in NPT, without display, guided-wave TDR, 4–20 mA (084H4525)

Technical Specifications

Properties

Compatibility

Standards

Approvals

Attached Documents