Danfoss AKS 4100 guided-wave (Time Domain Reflectometry) liquid level sensor, code 084H4562, coaxial version (d14). Continuous refrigerant liquid-level measurement in receivers, standpipes, intermediate coolers, oil pots and pressure vessels. 1000 mm (39.4 in) rigid coaxial probe (14 mm / 0.55 in outer stainless tube). Process connection G 1 in pipe thread. With integrated HMI display unit, language set English (default) / Japanese / Chinese / Russian. 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 5702428869744. OEM P/N 084H4562.
| Type | Danfoss AKS 4100 |
| Code number | 084H4562 |
| 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 | 1000 mm (39.4 in); coaxial D14 (14 mm / 0.55 in outer stainless tube) |
| Process connection | G 1 in pipe thread (aluminium gasket included) |
| 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 | PG13.5 / M20×1.5 (cable Ø 6–8 mm) |
| Display / HMI | integrated LCD 128×64 px, 8-step greyscale, 4-button keypad; languages EN (default), JA, ZH, RU |
| 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 | 4.1 kg (gross 6.99 kg) |
| Approvals | CE; EAC; GOST R Pattern Approval of Measuring Instruments (Russian Federation); PED 2014/68/EU (Art. 4, par. 3); CRN (TSSA); China RoHS |
| EAN | 5702428869744 |
| 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 | 1000 mm (39.4 in) probe |
| Thread standard | G 1 in pipe thread |
| MOQ | 1 |
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.