Measuring System
Measuring principle: Magnetic level indicator – bypass chamber (communicating tubes); float in measuring chamber (Ø73.03mm/NPS 2½ pipe) magnetically coupled to mechanical indicator
Measuring range (ML): 0.3…5.5 m / 1…18 ft (longer on request)

Measuring Accuracy
Accuracy: ±10 mm / 0.4 in
Repeatability: ±10 mm / 0.4 in (constant density)
Maximum rate of change: 20 mm/s / 0.787 in/s

Operating Conditions (Standard, all-metal)
Process temperature: -196…+400°C / -320.8…+752°F
Ambient temperature: -70…+80°C / -94…+176°F
Storage temperature: -70…+80°C / -94…+176°F
Process pressure: -1…40 barg (PN40/Class 300) up to -1…400 barg (PN400/Class 2500)

Operating Conditions (PTFE-lined)
Process temperature: -70…+200°C / -94…+392°F
Process pressure: -1…40 barg / -14.5…580 psig
Density: 500…1200 kg/m³ / 31.21…74.91 lb/ft³

Chemical Properties
Density (standard, by pressure class): 370…1200 kg/m³ (PN40) up to 740…1200 kg/m³ (PN400)
Viscosity: ≤500 mPa·s / ≤500 cP

Ingress Protection
Indicator column: IP66 / IP68 (0.15 barg)

Materials (Standard)
Measuring chamber: Stainless steel 1.4404/316L or 1.4307/304L; Hastelloy® C-276 (2.4819); Inconel® 625 (2.4856)
Float: Stainless steel 316L/304L, titanium, Hastelloy® C-276, Inconel® 625 (PN40-PN100); Titanium (PN250-PN400)
Indicator column tube: Borosilicate glass 3.3 (ISO 3585), hermetically sealed

Materials (PTFE-lined)
Measuring chamber: PTFE-lined stainless steel 1.4404/316L
Float: Halar® ECTFE-coated titanium; borosilicate glass 3.3
Process connection: Stainless steel 1.4404/316L

Process Connections (Standard, PN40/Class 300)
Threaded pipes: 1/2…1 NPT or G 1/2…1 (male/female)
Welded pipe: NPS 1/2…1 Sch10S
Flange EN: DN15…50, PN40
Flange ASME: NPS 1/2…2, Class 150/300
Flange JIS: 25…50, 20K

LT40 Reed-Chain Level Transmitter
Measuring principle: Reed resistor chain, magnetically operated
Resolution: Standard ±10 mm / 0.4 in (Option: ±5 mm / 0.2 in)
Output: 4-20 mA (HART® 7), FOUNDATION™ fieldbus, or PROFIBUS PA
Power supply (4-20mA, no LCD): 10-35 VDC (non-Ex/Ex db) / 10-30 VDC (Ex ia)
Ambient temperature: -40…+80°C / -40…+176°F
Ingress protection: IP66/IP68 (1.5m depth, 2 weeks)
Housing material: Polyester-coated aluminium

MS15/MS40 Limit Switches
Measuring principle: Bistable reed switch (SPDT)
Switching capacity: 250 V AC/DC, 1 A, 60 VA/W (standard) / NAMUR: Umax=13V DC
Operating temperature: -40…+115°C (MS15) / -40…+120°C (MS40)
Ingress protection: MS15: IP66/IP68; MS40: IP66

Approvals and Certifications
CE marking
Explosion protection: ATEX/IECEx — Ex h IIC T6…T* Ga/Gb (indicator, all-metal); Ex h IIC T6…T3 Ga/Gb (PTFE-lined); Ex ia/Ex db IIC T6…T1 (LT40, MS15/40)
Pressure: EU Pressure Equipment Directive (PED)
Vibration resistance: EN 60721-3-4, class 4M4
Construction code: EN 13445 (standard); NACE MR0175/MR0103/ISO 15156 (option)