Honeywell STR82D-21CS000-00000000 SmartLine Remote Seal Pressure Transmitter
Overview
The Honeywell STR82D-21CS000-00000000 is a SmartLine ST800 Series remote diaphragm seal pressure transmitter, engineered for applications where the process fluid is corrosive, viscous, high-temperature, or otherwise unsuitable for direct contact with a standard in-line sensor. The STR82D covers the lowest span in the STR800 remote-seal family, with a nominal range of 0–400 inH2O (0–1000 mbar), and uses a capillary-connected diaphragm seal to isolate Honeywell’s high-performance piezo-resistive sensor from the wetted process while still delivering SmartLine-class accuracy and diagnostics.
Seven Star LLC supplies the genuine Honeywell STR82D-21CS000-00000000 SmartLine remote diaphragm seal transmitter to process industry customers across Oman and the GCC. As a partner sourcing authentic Honeywell Process Solutions instrumentation, Seven Star supports refineries, petrochemical plants, and water treatment facilities in Muscat, Sohar, and Duqm with genuine SmartLine ST800 transmitters, remote seal engineering guidance, and full documentation for hazardous-area and safety-instrumented-system installations.
Measurement and Operating Principle
In the STR82D, process pressure acts on a diaphragm seal mounted directly at the vessel or pipe connection. The seal is filled with an incompressible fill fluid that transmits the pressure through a capillary tube to the transmitter’s piezo-resistive sensing element, without any process fluid ever entering the transmitter body itself. This remote-seal architecture means corrosive, high-viscosity, crystallizing, or high-temperature media — fluids that would damage or clog a conventional impulse-line connected transmitter — can be measured reliably and with minimal maintenance.
The Honeywell STR82D automatically compensates for static pressure and ambient temperature effects on the fill fluid and capillary, preserving measurement accuracy of up to 0.0375% of span across a rangeability of up to 100:1. Output is available via 4–20 mA with HART 7, Honeywell DE, or FOUNDATION Fieldbus digital protocols, and the transmitter provides continuous on-board diagnostics with Health Watch status indication so operators can identify sensor drift, seal issues, or wiring faults before they affect control loop integrity.
Engineering Design
The Honeywell STR82D-21CS000-00000000 electronics housing is polyester powder-coated aluminum (optional 316/316L stainless steel) rated IP66/IP67, suitable for outdoor and washdown environments across Oman’s coastal and desert climate extremes, with an ambient operating range of -55°C to +90°C. Wetted diaphragm seal materials are available in 316L stainless steel, Monel, Hastelloy C, or tantalum to match aggressive process chemistries, and seal styles include flush flange, extended diaphragm, pancake, sanitary, chemical tee/Taylor wedge, threaded, and saddle configurations to fit virtually any vessel or nozzle connection.
Overpressure protection is rated to Honeywell’s World Class standard and the transmitter is SIL 2/3 compliant per IEC 61508, with certifications including FM, CSA, ATEX, IECEx, and marine approvals from ABS, BV, DNV, KR, and LR. A modular LCD local display with three-button configuration allows on-site zero, span, and parameter adjustment without a separate communicator, while external configuration is fully supported via HART or DE handheld and DTM-based tools.
Honeywell STR82D Key Features
- Remote diaphragm seal design isolates the sensor from corrosive, viscous, or high-temperature process media
- 0–400 inH2O (0–1000 mbar) range with accuracy up to 0.0375% of span
- Rangeability up to 100:1 with automatic static pressure and temperature compensation
- HART 7, Honeywell DE, and FOUNDATION Fieldbus digital communication options
- Wetted seal materials in 316L SS, Monel, Hastelloy C, or tantalum for chemical compatibility
- SIL 2/3 compliant per IEC 61508 with World Class overpressure protection
- IP66/IP67 rated housing, ambient range -55°C to +90°C
- Comprehensive on-board diagnostics with Health Watch critical/non-critical indication
Industrial Applications
The Honeywell STR82D-21CS000-00000000 is specified for high-accuracy level measurement in pressurized vessels within hydrocarbon processing, as well as flow and pressure measurement of slurries, high-viscosity fluids, and corrosive chemicals in refining, petrochemical, and chemical plants. Typical installations include reactor and column level measurement, tank farm interface level monitoring, and pressure measurement on lines carrying crystallizing or fouling media where a direct-wetted transmitter would require frequent cleaning or replacement.
Seven Star LLC supports oil and gas, petrochemical, and water and wastewater customers throughout Oman — including Muscat, Sohar, and Salalah — with genuine Honeywell SmartLine STR82D remote seal transmitters, correct seal-material and fill-fluid selection guidance, and documentation for ATEX/IECEx hazardous-area and SIL-rated safety instrumented system applications.
Honeywell STR82D Technical Specifications
| Model | Honeywell STR82D-21CS000-00000000 |
| Series | SmartLine ST800 Remote Diaphragm Seal Transmitter |
| Range | 0–400 inH2O (0–1000 mbar) |
| Accuracy | Up to 0.0375% of span |
| Rangeability | Up to 100:1 |
| Output | 4–20 mA with HART 7, Honeywell DE, or FOUNDATION Fieldbus |
| Wetted Seal Materials | 316L Stainless Steel, Monel, Hastelloy C, Tantalum |
| Electronics Housing | Polyester powder-coated aluminum or 316/316L SS, IP66/IP67 |
| Ambient Temperature | -55°C to +90°C |
| Safety Rating | SIL 2/3 compliant, IEC 61508 |
| Approvals | FM, CSA, ATEX, IECEx, NEPSI, KOSHA, EAC, Marine (ABS, BV, DNV, KR, LR) |
| Upper / Lower Range Limit | +400 to -400 inH2O (+1000 to -1000 mbar) |
| Minimum Span | 4.0 inH2O (10 mbar) |
| Supply Voltage | 10.8 to 42.4 Vdc at the terminals (intrinsically safe versions limited to 30 Vdc) |
| Loop Load | 0 to 1,440 ohms |
| Fill Fluid Options | Silicone 200, Silicone 704, CTFE, NEOBEE M-20 |
| Gasket Materials | Viton, graphite, PTFE |
| Manufacturer | Honeywell Process Solutions |
Range Limits, Loop Power and Fill Fluid Selection
Within the STR800 remote seal family the Honeywell STR82D is the differential-pressure water-column model, with an upper range limit of 400 inH2O (1000 mbar), a lower range limit of -400 inH2O (-1000 mbar) and a minimum span of 4.0 inH2O (10 mbar). Those figures are what produce the quoted 100:1 rangeability, and they matter at specification time: a loop calibrated far below the minimum span will not hold the 0.0375% of span reference accuracy regardless of how well the seals are installed. Loop power is conventional two-wire, 10.8 to 42.4 Vdc measured at the transmitter terminals with intrinsically safe versions limited to 30 Vdc, driving a loop load of 0 to 1,440 ohms, so existing 4–20 mA infrastructure in a legacy plant will normally accept the transmitter without a barrier or power-supply change.
Fill fluid selection is the decision that most often determines whether a remote seal installation performs as designed. Honeywell offers Silicone 200 (specific gravity 0.94 at 25 °C), Silicone 704 (1.07), CTFE (1.89) and the food-grade NEOBEE M-20 (0.93), and the published note that the ambient temperature limit is itself a function of process interface temperature and fill fluid is the reason seal and fill selection cannot be treated as a catalogue afterthought. Capillary length, seal elevation and fill density together set the head correction and the thermal response of the installation. Gasket materials are available in Viton, graphite and PTFE, and diaphragm sizes across the seal styles run from approximately 1.9 in to 4.1 in.
Safety, Approvals and Field Maintenance
The transmitter uses Honeywell’s Integral Dual Seal design, referenced to ANSI/NFPA 70-202 and ANSI/ISA 12.27.0, which removes the need for a separate secondary process seal in many installations. Beyond the FM, CSA, ATEX and IECEx listings, the STR800 platform carries NEPSI, KOSHA, EAC, CCoE, INMETRO, SAEx, UATR and UKEX approvals together with the marine certificates from ABS, BV, DNV, KR and LR, which covers essentially every hazardous-area documentation regime a GCC project is likely to invoke. In the field, the modular LCD display operates from -20 °C to +70 °C and is stored between -30 °C and +80 °C, so a panel-mounted indicator in an unshaded outdoor enclosure should be specified with a sunshade even where the transmitter body itself is comfortably inside its operative limits. Because the process fluid never enters the meter body, routine maintenance is limited to inspecting the seal diaphragms and capillary armour rather than draining and flushing impulse lines.
Request a Quote
Contact Seven Star LLC for pricing, lead time, and stock availability on the genuine Honeywell STR82D remote seal transmitter SmartLine remote seal transmitter in Oman. Our engineering team can help confirm the correct seal style, fill fluid, and wetted material for your process application.
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Honeywell is a global technology corporation specializing in advanced industrial automation, process control architectures, and precision field instrumentation. At Seven Star LLC, we provide Honeywell’s robust engineering solutions, including distributed control systems (DCS), smart pressure and temperature transmitters, and modular safety systems. Engineered to optimize complex production loops and ensure rigorous cyber-physical security, these technologies are critical for refineries, power generation plants, and petrochemical facilities across Oman. By supplying authentic Honeywell hardware and control platforms, Seven Star LLC enables GCC enterprises to achieve exceptional operational stability, regulatory compliance, and maximized asset throughput in demanding industrial environments.
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