Endress+Hauser Promass I 300 (8I3B) Coriolis Mass Flowmeter — Inline Viscosity

Promass I 300 (order code 8I3B) is a Coriolis mass flowmeter built on a single straight measuring tube in titanium grade 9. Beyond mass flow, density and temperature, it delivers in-line viscosity as a measured variable — so one instrument on the line replaces a flowmeter, a density transducer and a lab viscometer at the same time.

The full-bore straight-tube design keeps pressure loss to a minimum and treats the fluid gently, which makes it the preferred Coriolis choice for viscous, shear-sensitive, fibrous or particle-laden media that would clog a bent-tube sensor. The tube is straight, self-draining and easy to clean, and the hygienic execution carries 3-A and EHEDG approval. The compact dual-compartment transmitter offers up to 3 freely assignable I/Os, Ethernet-based communication, a 4-line backlit touch display with WLAN access, and Heartbeat Technology for verification without shutting down the process.

Why Promass I 300 Stands Apart

• Inline viscosity, not just flow: The single-tube Coriolis sensor additionally outputs viscosity alongside mass flow, density and concentration, giving real-time product quality feedback on the line instead of periodic lab sampling.
• Full-bore straight tube, minimum pressure loss: No bent measuring tubes to restrict the flow path, so pumping energy stays low and highly viscous or shear-sensitive media are handled without mechanical degradation.
• Practically clog-free with fibres and particles: A straight, unobstructed bore lets fibrous, pulpy or particulate media pass through, and allows pigging and gravity draining — no dead pockets to trap product.
• ±0.10 % accuracy across the whole range: Liquid mass and volume flow accuracy of ±0.10 % of reading, gas mass flow ±0.50 %, liquid density ±0.0005 g/cm³ over DN 8–80 and up to 180,000 kg/h.
• Titanium wetted parts: Measuring tube in titanium grade 9 with grade 2 connections, combined with 3-A, EHEDG and cGMP approval — one device for aggressive chemicals and hygienic food, beverage, pharma or cosmetic duty.
• TMB technology for stable readings: The single-tube sensor is actively stabilised against external plant vibration and pipe-borne disturbance, keeping the zero point and readings steady on vibrating skids and crowded pipe racks.
• Real I/O flexibility, not a fixed output set: Up to 3 freely assignable outputs plus HART, PROFIBUS DP/PA, FOUNDATION Fieldbus, Modbus RS485, PROFINET, EtherNet/IP, OPC-UA and Ethernet-APL, so one hardware variant covers legacy PLC, DCS and modern Ethernet architectures.
• Verification without stopping production: Heartbeat Technology provides continuous self-diagnostics and traceable verification reports under TÜV SÜD attestation, supporting ISO 9001 and audit programmes with no process interruption.

Typical Applications

• Food & Beverage — chocolate and fat melts, glucose and syrup, fruit concentrate, dairy with particulates, CIP/SIP dosing where viscosity correlates with product quality
• Chemical — polymers and additives, surfactants, solvents, urea and resin dosing where pressure loss and shear matter
• Pharmaceutical & Life Science — hygienic buffer, medium and formulation dosing with 3-A/EHEDG cleanability and cGMP documentation
• Oil, Fuel & Lubricants — fuel oil, lube blending, bunkering and burner feed where viscosity directly drives combustion or lubrication performance
• Cosmetics & Personal Care — creams, gels, emulsions and shampoos: gentle handling plus concentration control from density
• Adhesives, Sealants & Coatings — high-viscosity dosing lines where a bent-tube meter would create back pressure or clogging

Hygienic Design & Cleanability

• Straight, crevice-free single tube — self-draining and piggable, no product retention between batches
• 3-A and EHEDG hygienic approval; cGMP-compliant documentation available
• Process temperature range −50 to +150 °C covers steam and hot-water CIP/SIP cycles without a separate meter
• Polished titanium wetted surfaces are compatible with aggressive cleaning agents and repeated sanitisation cycles
• Stainless steel hygienic transmitter housing option for washdown areas, plus IP69 protection option for high-pressure cleaning

Selection & Configuration Notes

Choosing the correct 8I3B variant depends on medium, line size, hygienic requirement and control architecture:

• Size: DN 8 to DN 80 covers most viscous and hygienic process lines. For viscous media keep line velocity low to limit pressure drop; for low-viscosity liquids the 180,000 kg/h ceiling is reached in the largest size.
• Wetted material: Titanium grade 9 tube / grade 2 connections is standard. Confirm chemical compatibility with your medium and cleaning agents before ordering; titanium is not suitable for all fluorinated or strongly reducing media.
• Process connection: Hygienic clamp (DIN 11864 / DIN 11851), Tri-Clamp, threaded or flanged connections are available — specify the plant standard.
• Temperature: −50 to +150 °C standard, covering CIP/SIP. For higher process temperatures or DN above 80, the Promass F 500 (8F5B) or Promass O 300 (8O3B) is the correct model.
• Output & communication: 3 freely assignable outputs; HART for analog retrofits, PROFIBUS PA or FOUNDATION Fieldbus for DCS, Modbus RS485 / PROFINET / EtherNet/IP / OPC-UA for PLC and Industry 4.0 integration, Ethernet-APL for digital fieldbus plants.
• Approvals: ATEX, IECEx, cCSAus, NEPSI, INMETRO, EAC, UK Ex and KC versions — confirm hazardous-area zone and gas group before ordering.
• Viscosity use case: Inline viscosity is ideal for trend monitoring, quality control and closed-loop adjustment. For contractual or lab-grade viscosity values, define the reference method and calibration points with our technical team in advance.

Available Nominal Sizes

Nominal diameter	Inch size	Typical order code prefix
DN 8	3/8"	8I3B08
DN 15	1/2"	8I3B15
DN 25	1"	8I3B25
DN 40	1 1/2"	8I3B40
DN 50	2"	8I3B50
DN 80	3"	8I3B80

The complete order code also encodes process connection, approval, output and housing options — send your full requirement for a confirmed configuration.

Key Technical Specifications

Parameter	Specification
Product model	Promass I 300, order code 8I3B
Measuring principle	Coriolis, single straight measuring tube
Measured variables	Mass flow, density, temperature, volume flow, corrected volume flow, reference density, concentration, viscosity
Nominal diameter	DN 8 … DN 80 (3/8" … 3")
Wetted materials	Measuring tube: titanium grade 9; connections: titanium grade 2
Mass flow accuracy (liquid)	±0.10 % of reading
Volume flow accuracy (liquid)	±0.10 % of reading
Mass flow accuracy (gas)	±0.50 % of reading
Density accuracy (liquid)	±0.0005 g/cm³
Measuring range	0 … 180,000 kg/h (0 … 6,600 lb/min)
Maximum process pressure	PN 100, Class 600, 63K
Medium temperature	−50 … +150 °C (−58 … +302 °F)
Ambient temperature	Standard −40 … +60 °C; option −50 … +60 °C
Sensor housing	1.4301 / 1.4307 (304L), corrosion resistant
Transmitter housing	AlSi10Mg coated; 1.4409 (CF3M) similar to 316L; stainless steel hygienic design
Degree of protection	IP66/67, Type 4X enclosure; option IP69
Display / operation	4-line backlit display with touch control; WLAN access; remote display available
Outputs	3 outputs: 4–20 mA HART (active/passive), 4–20 mA (active/passive), pulse/frequency/switch (active/passive), relay
Inputs	Status input, 4–20 mA input
Digital communication	HART, PROFIBUS DP, PROFIBUS PA, FOUNDATION Fieldbus, Modbus RS485, PROFINET, PROFINET over Ethernet-APL, EtherNet/IP, OPC-UA
Power supply	DC 24 V; AC 100–230 V; AC 100–230 V / DC 24 V (non-hazardous area)
Hazardous area approvals	ATEX, IECEx, cCSAus, NEPSI, INMETRO, EAC, UK Ex, KC
Hygienic approvals	3-A, EHEDG, cGMP
Functional safety	IEC 61508, applicable in IEC 61511 safety-related applications
Metrological approvals	Calibration on ISO/IEC 17025 accredited facilities; Heartbeat verification per ISO 9001:2015 section 7.1.5.2 a (TÜV SÜD)
Pressure approvals	PED, CRN
Material certificates	3.1 material certificate available as option
Product safety marking	CE, C-tick, EAC

Which Proline Model Fits Your Duty?

Model	Size range	Best for	Inline viscosity
Promass I 300 (8I3B)	DN 8–80	Viscous, shear-sensitive, fibrous or hygienic media; low pressure loss; inline viscosity	Yes
Promass F 500 (8F5B)	DN 8–250	Heavy-duty process lines, custody transfer, high temperature, ±0.05 % PremiumCal option	No
Promass O 300 (8O3B)	DN 80–250	High pressure up to PN 250 / Class 1500, offshore and oil & gas, super duplex wetted parts	No

Installation Notes

• No straight pipe runs required: The Coriolis principle is independent of flow profile, so upstream and downstream sections, elbows and valves do not affect accuracy.
• Orientation and draining: The straight single tube allows gravity draining and pigging; select the installation orientation so product cannot collect in the sensor between batches.
• Vibration: TMB technology suppresses external vibration influence, but the sensor should still be supported and not used as a pipe support point.
• Zero point: Perform zero-point adjustment on a completely filled, zero-flow line after installation and during commissioning.
• Commissioning convenience: The touch display plus WLAN access allows configuration and reading from a tablet or phone in the field, with no extra tooling — useful in skids, clean rooms and confined plant areas.

Certifications & Compliance

Hazardous area: ATEX, IECEx, cCSAus, NEPSI, INMETRO, EAC, UK Ex, KC. Hygienic: 3-A, EHEDG, cGMP. Functional safety: IEC 61508 / IEC 61511. Pressure: PED, CRN. Calibration on ISO/IEC 17025 accredited facilities. Heartbeat Technology provides TÜV SÜD-attested verification under ISO 9001:2015 section 7.1.5.2 a.

FAQ

Q1: Does the 8I3B measure viscosity and flow at the same time?
A: Yes. Promass I is a Coriolis single straight-tube sensor that delivers mass flow, density, temperature, concentration and viscosity from the same measuring tube — no additional viscometer or density meter is needed on the line.

Q2: Can it handle media with fibres or particles without clogging?
A: Yes. The full-bore straight tube has no bend or restriction, so fibrous, pulpy and particulate media pass through without accumulation, and the tube can be pigged and drained between products.

Q3: Is it suitable for CIP and SIP cleaning?
A: Yes. The standard process temperature range of −50 to +150 °C covers steam and hot-water CIP/SIP cycles, and the hygienic design carries 3-A and EHEDG approval with cGMP documentation available.

Q4: What is the difference between the 8I3B and the 8F5B?
A: The 8I3B is the single straight-tube version with inline viscosity, DN 8–80, best for viscous and hygienic duty. The 8F5B is the heavy-duty bent-tube version, DN 8–250, with higher temperature options and a ±0.05 % PremiumCal option for custody transfer.

Q5: How accurate is the density and concentration output?
A: Liquid density accuracy is ±0.0005 g/cm³, which allows concentration control for solutions such as sugar, acid, caustic and polymer blends directly from the density reading.

Q6: Can it be installed in a hazardous area?
A: Yes. ATEX, IECEx, cCSAus, NEPSI, INMETRO, EAC, UK Ex and KC versions are available — confirm your zone, gas group and temperature class when ordering.

Procurement & Delivery

Every Promass I 300 8I3B unit we supply is genuine Endress+Hauser, tested and delivered with its calibration certificate; 3.1 material certificates and hygienic documentation are available on request. We support project supply, spare units and replacement meters for chemical, food & beverage, pharmaceutical and EPC customers, and can confirm the exact order code from your process data. Send your medium, viscosity or concentration range, line size, pressure rating, process connection and required approval — we will come back with a confirmed 8I3B configuration and quotation within one business day.