Functional safety

The production of a safety instrumented system must be done with the best SIL certified instruments

To obtain reliable information for safety instrumented systems (IEC 61511), proper instrument specification and implementation is crucial. The application must be clear, the correct instrument technology applied and the life cycle properly managed.

Functional safety in process instrumentation. Learn about Safety Integrity Levels (SIL), continuous self-monitoring, homogeneous redundancy and proof testing.

Regular verification or remote iterative proof test with SIL certified protocol (hardware/ software) — Remote initiation of proof test

Safety by choice

Our extensive SIL qualified and certified instrumentation portfolio is developed according to IEC 61508. We offer the best solutions for every measuring task including flow , level , pressure , temperature and measurement subsystems. Many of our devices have a SIL rating of SIL 2/3. This means you can reach SIL 3 even in homogeneous redundancy.

Safety by smart proof testing

Sensors and sensor subsystems must be proof tested to ensure that they are available to carry out their safety role. With smart sensors you are able to evoke proof testing procedures including in-situ proof testing via a push-button or software simulation. Actionable diagnostics and safety parameters offer you the ability to extend proof test intervals reducing your risk, lowering costs and improving availability.

Our full SIL capable certified measurement family

Are you looking for more information on our SIL certified devices or would you like to download datasheets or safety manuals? Use the filters below to find the products in our SIL capable portfolio that best fit your needs.

Discover why functional safety is critical for your operations.

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Proline Promag P 300
electromagnetic flowmeter

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Flow measurement

High-temperature flowmeter for process applications with a compact, easily accessible transmitter

Predecessor: Promag 50P, Promag 51P, Promag 53P, Promag 50E, Promag 53E

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Max. measurement error

Volume flow (standard): ±0.5 % o.r.± 1 mm/s (0.04 in/s)
Volume flow (option): ±0.2 % o.r. ± 2 mm/s (0.08 in/s), Flat Spec

Measuring range

4 dm³/min to 9600 m³/h (1 gal/min to 44 000 gal/min)

Medium temperature range

Liner material PFA: –20 to +150 °C (–4 to +302 °F)
Liner material PFA high-temperature: –20 to +180 °C (–4 to +356 °F)
Liner material PTFE: –40 to +130 °C (–40 to +266 °F)

Max. process pressure

PN 40, Class 300, 20K

Wetted materials

Liner: PFA; PTFE
Electrodes: 1.4435 (F316L); Alloy C22, 2.4602 (UNS N06022); Tantalum; Platinum; Titanium
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Proline Promass F 300
Coriolis flowmeter

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Products

Flow measurement

Flowmeter with premium accuracy, robustness and a compact, easily accessible transmitter

Predecessor: Promass 80F, Promass 83F, Promass 84F

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Max. measurement error

Mass flow (liquid): ±0.10 % (standard), 0.05 % (option)
Volume flow (liquid): ±0.10 %
Mass flow (gas): ±0.25 %
Density (liquid): ±0.0005 g/cm³

Measuring range

0 to 2 200 000 kg/h (0 to 80 840 lb/min)

Medium temperature range

Standard: –50 to +150 °C (–58…+302 °F)
Option: –50 to +240 °C (–58…+464 °F)
High temperatur option: –50 to +350 °C (–58…+662 °F)
Option: –196 to +150 °C (–320 to +302 °F)

Max. process pressure

PN 100, Class 600, 63K

Wetted materials

Measuring tube: 1.4539 (904L); 1.4404 (316/316L); Alloy C22, 2.4602 (UNS N06022)
Connection: 1.4404 (316/316L); Alloy C22, 2.4602 (UNS N06022); 1.4301 (F304)
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Liquiphant FTL51B - digital, simple and safe

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Level

Point level switch for all liquid media

Predecessor: Liquiphant M FTL51, Liquiphant M FTL50

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Process temperature

-50 °C...+150 °C
(-58 °F...+302 °F)

Process pressure / max. overpressure limit

Vacuum...100 bar
Vacuum...1450 psi

Min. density of medium

0.5 g/cm³
(0.4 g/cm³ optional)
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iTEMP TMT82 temperature transmitter

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Temperature

HART® temperature transmitter as head, field or DIN rail device with two universal sensor inputs suitable for use in hazardous areas and SIL 2

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Accuracy

(Pt100, -50...200 °C) <= 0,1 K
(Pt100, -58...392 °F) <= 0,18 °F
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Proline t-mass F 300
thermal mass flowmeter

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Products

Flow measurement

Inline flowmeter with long-term stability and a compact, easily accessible transmitter

Predecessor: t-mass 65F, t-mass 65I

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Max. measurement error

Gas: 1.0% o.r. (10 to 100% o.f.s.), 0.1% o.f.s. (1 to 10% o.f.s.)

Measuring range

0.5 to 3750 kg/h (1.1 to 8250 lb/h)

Medium temperature range

-40 °C to +180°C (-40 °F to +356 °F)

Max. process pressure

PN40 / Cl. 300 / 20K

Wetted materials

Measuring tubes
DN 15 to 50 (½ to 2"): stainless cast steel, CF3M/1.4408
DN 65 to 100 (2½ to 4"): stainless steel, 1.4404 (316/316L)
Process connections
Flange connections
Stainless steel, 1.4404 (F316/F316L)
Threaded connections
Stainless steel, 1.4404 (316/316L)
Sensing element
Unidirectional
Stainless steel, 1.4404 (316/316L)
Alloy C22, 2.4602 (UNS N06022);
Bidirectional
Stainless steel, 1.4404 (316/316L)
Reverse flow detection
Stainless steel, 1.4404 (316/316L)
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Proline Prowirl F 200
vortex flowmeter

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Flow measurement

Versatile flowmeter with detection of wet steam conditions and best-in-class accuracy

Predecessor: Proline Prowirl F 200 / 7F2B

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Max. measurement error

Volume flow (liquid): ±0.75 %
Volume flow (optional): ±0.65 %
Volume flow (steam, gas): ±1.00 %
Mass flow (saturated steam): ±1.7% (temperature compensated); ±1.5% (temperature/pressure compensated)
Mass flow (superheated steam, gas): ±1.5 (temperature/pressure compensated); ±1.7% (temperature compensated + external pressure compensation)
Mass flow (liquid): ±0.85%

Measuring range

Liquid: 0.2 to 2100 m³/h (0.15 to 1520 ft³/min)
depending on medium: water with 1 bar a, 20 °C (14.5 psi a, 68° F)
Steam, gas: 1.5 to 28000 m³/h (0.9 to 16600 ft³/min)
depending on medium: steam with 180 °C, 10 bar a (356 °F, 145 psi a); air with 25 °C, 4.4 bar a (77 °F, 63.8 psi a)

Medium temperature range

Standard: –40 to +260 °C (–40 to +500 °F)
High/low temperature (option): –200 to +400 °C (–328 to +752 °F)

Max. process pressure

PN 100, Class 600, 20K

Wetted materials

Measuring tube: 1.4408 (CF3M); CX2MW similar to Alloy C22, 2.4602
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Proline Promass X 300
Coriolis flowmeter

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Flow measurement

Highest capacity four-tube flowmeter with a compact, easily accessible transmitter

Predecessor: Promass 83X, Promass 84X

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Max. measurement error

Mass flow (liquid): ±0.10 % (standard), 0.05 % (option)
Volume flow (liquid): ±0.10 %
Mass flow (gas): ±0.35 %
Density (liquid): ±0.0005 g/cm³

Measuring range

0 to 4100 t/h (0 to 4520 tn. sh./h)

Medium temperature range

–50 to +180 °C (–58 to +356 °F)

Max. process pressure

PN 100, Class 600

Wetted materials

Measuring tube: 1.4404 (316/316L)
Connection: 1.4404 (316/316L)
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Proline Prosonic Flow G 300 ultrasonic flowmeter

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Flow measurement

Highly robust gas specialist for fluctuating conditions with compact, easily accessible transmitter

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Max. measurement error

Volume flow (standard):
‐ ±1.0 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s)
‐ ±2 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s)
Volume flow (optional calibration):
‐ ±0.5 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s)
‐ ±1.0 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s)
Corrected volume flow (standard):
‐ ±1.5 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s)
‐ ±2.5 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s)
Corrected volume flow (optional calibration):
‐ ±1.0 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s)
‐ ±1.5 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s)
Sound Velocity: ±0.2 % o.r.

Measuring range

Gas: 0.3 m/s to 40 m/s

Medium temperature range

-50 to 150 °C (-58 to +302°F)
-50 to 100 °C (-58 to +212°F) with integrated pressure cell

Max. process pressure

0.7 to 101 bar a (10.15 to 1464.88 psi a)

Wetted materials

Measuring tube: 1.4408/1.4409 (CF3M)
Transducer: 1.4404 (316, 316L), Titan Grade 2
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Proline Prosonic Flow P 500 ultrasonic clamp-on flowmeter

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Flow measurement

Reliable, flexible, zero maintenance – noninvasive flow measurement, consistently accurate, even under challenging conditions

Predecessor: Prosonic Flow Clamp On 93P

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Max. measurement error

Volume flow:
±3% o.r. for DN 15
±2% o.r. for DN 25 to DN 200
±2% o.r. above DN 200

Measuring range

0 to 15 m/s (0 to 50 ft/s)

Medium temperature range

DN 15 to 65 (½to 2½"): –40 to +150°C (–40 +302 °F)
DN 50 to 4000 (2 to 160"): –40 to +170°C (–40 to +338 °F)
DN 50 to 600 (2" to 24"): 150°C to 550°C (+302 to +1022 °F)

Max. process pressure

N/A
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Radiometric level and density measurement Gammapilot FMG50

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Level

Compact transmitter for point level detection, continuous level, interface and density measurement

Predecessor: Gammapilot M FMG60

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Process temperature

Any

Process pressure / max. overpressure limit

Any

Max. measurement distance

Unlimited measuring range,
Cascade

Accuracy

+/-1%

Main wetted parts

Non-contact
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Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

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Success stories

Success story
Functional Safety in practice

Investments in functional safety, and thus in measures to avoid accidental and systematic errors, are very moderate if one relies on instruments developed according to IEC 61508.
Read the full story

Functional safety

The production of a safety instrumented system must be done with the best SIL certified instruments

Safety by choice

Safety by smart proof testing

Our full SIL capable certified measurement family

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Process temperature

Process pressure / max. overpressure limit

Min. density of medium

Accuracy

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Wetted materials

Max. measurement error

Measuring range

Medium temperature range

Max. process pressure

Process temperature

Process pressure / max. overpressure limit

Max. measurement distance

Accuracy

Main wetted parts

Success stories

Functional Safety in practice

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