Honeywell STD815 Differential Pressure Transmitter

Honeywell STD815 Differential Pressure Transmitter: Complete Technical Specifications & Performance Data

Product Overview

The Honeywell STD815 Differential Pressure Transmitter belongs to the SmartLine® ST800 family, representing a high-performance differential pressure measurement solution built around advanced piezoresistive sensor technology. The Honeywell STD815 Differential Pressure Transmitter integrates differential pressure sensing with on-chip static pressure and temperature compensation, delivering exceptional measurement accuracy and long-term stability across a wide range of process and ambient conditions-29.

The SmartLine family has been fully tested and complies with Experion® PKS standards, ensuring the highest level of compatibility assurance and seamless integration capabilities. The Honeywell STD815 Differential Pressure Transmitter easily meets the most demanding application requirements for pressure measurement in industrial process environments-44.

Technical Specifications

Pressure Ranges and Limits

The Honeywell STD815 Differential Pressure Transmitter features a differential pressure range of -100 to 100 inH₂O (-249 to 249 mbar) with an upper range limit (URL) of 100 inH₂O (250 mbar) and a lower range limit (LRL) of -100 inH₂O (-249 mbar)-1-11. The minimum span for the Honeywell STD815 Differential Pressure Transmitter is 0.5 inH₂O (1.25 mbar), making it suitable for applications requiring fine differential pressure resolution-1-11.

The Honeywell STD815 Differential Pressure Transmitter offers a maximum turndown ratio of 200:1, providing exceptional rangeability that reduces inventory requirements and allows a single device to cover multiple measurement scenarios-1-11. The maximum allowable working pressure (MAWP) for the STD800 series is rated up to 4,500 psi (310 bar) standard, with an optional upgrade to 6,000 psi (420 bar) depending on model configuration-1.

Performance and Accuracy

The Honeywell STD815 Differential Pressure Transmitter delivers reference accuracy up to 0.035% of calibrated span as standard, with an optional 0.025% accuracy available for critical custody transfer and high-value applications-1-11-44. Long-term stability for the Honeywell STD815 Differential Pressure Transmitter is rated at 0.01% of URL per year, sustained over a period of 15 years of continuous operation. This exceptional stability reduces calibration frequency and lowers total ownership costs-3-44.

Automatic static pressure and temperature compensation is embedded directly into the sensor chip architecture, ensuring that the Honeywell STD815 Differential Pressure Transmitter maintains accuracy even under fluctuating process conditions. The transmitter achieves a dynamic response time as fast as 90 milliseconds, enabling rapid detection of process changes-3-44.

Electrical Specifications and Communication

The Honeywell STD815 Differential Pressure Transmitter supports multiple communication protocols to accommodate various control system architectures:

HART® (Version 7.0): 10.8 to 42.4 VDC supply voltage

FOUNDATION™ Fieldbus: 9 to 32 VDC supply voltage

Honeywell Digitally Enhanced (DE): 15 to 49.3 VDC supply voltage

The Honeywell STD815 Differential Pressure Transmitter provides standard 4-20 mA analog output with digital communication capability. Polarity insensitive electrical connections simplify installation and reduce the risk of wiring errors-29-11.

Environmental Conditions

The Honeywell STD815 Differential Pressure Transmitter is designed for reliable operation in harsh industrial environments:

Ambient Operating Temperature: -40°C to +85°C

Storage Temperature: -55°C to +120°C

Relative Humidity: 0 to 100% RH

Ingress Protection: NEMA 4X, IP66/IP67 ratings

These environmental specifications ensure that the Honeywell STD815 Differential Pressure Transmitter maintains performance integrity in outdoor installations, washdown areas, and extreme climate conditions-1-11.

Materials of Construction

Wetted Materials

The Honeywell STD815 Differential Pressure Transmitter offers a comprehensive selection of wetted materials to accommodate a wide variety of process media and corrosive environments:

316L Stainless Steel – Standard option for general industrial applications

Hastelloy® C-276 – For highly corrosive and acidic media

Monel® 400 – Suitable for seawater and reducing acid environments

Tantalum – For extreme corrosion resistance in aggressive chemical service

Gold-Plated options – For specialized applications requiring enhanced surface protection

Head gasket materials for the Honeywell STD815 Differential Pressure Transmitter include glass-filled PTFE as standard, with Viton and graphite available as optional upgrades-1-11.

Enclosure and Housing

The Honeywell STD815 Differential Pressure Transmitter is housed in a low-copper (<0.4%) aluminum alloy enclosure with pure polyester powder coating, providing excellent corrosion resistance in industrial environments. A stainless steel housing option is available for applications requiring enhanced durability and marine-grade protection.

Functional Features and Diagnostics

Display and Configuration

The Honeywell STD815 Differential Pressure Transmitter features a modular LCD display that can be added or removed in the field without affecting performance or certification status. The display supports 0°, 90°, 180°, and 270° position adjustments for optimal viewing in any mounting orientation. The basic alphanumeric LCD display supports a comprehensive range of measurement units including Pa, kPa, MPa, kg/cm², torr, atm, inH₂O, mH₂O, bar, mbar, inHg, ftH₂O, mmH₂O, mmHg, and psi-29.

External zero, span, and configuration capability is provided via externally accessible buttons, enabling field adjustments without opening the enclosure. The advanced graphics LCD display option offers up to eight configurable screens with large PV display with bar graph or trend graph formats-3-29.

On-Board Diagnostics

The Honeywell STD815 Differential Pressure Transmitter incorporates comprehensive on-board diagnostic capabilities that provide advanced warning of potential failure events, minimizing unplanned shutdowns and reducing overall operational costs. Key diagnostic features include:

Plugged Impulse Line Detection (PILD) – Identifies blocked impulse lines before they affect measurement accuracy

NAMUR NE-107 Extended Diagnostics – Provides standardized diagnostic status signals for Foundation Fieldbus communications

Dual/Triple Calibration Option – Available for HART and Fieldbus versions

Integrated self-monitoring – Continuous verification of sensor and electronics health

These diagnostic capabilities allow the Honeywell STD815 Differential Pressure Transmitter to provide predictive maintenance alerts, helping users optimize maintenance schedules and avoid costly process interruptions-3-29.

Safety and Certifications

Safety Design

The Honeywell STD815 Differential Pressure Transmitter features an Integral Dual Seal design conforming to ANSI/NFPA 70-202 and ANSI/ISA 12.27.0 standards, providing the highest level of safety for applications where primary pressure containment failure could lead to hazardous conditions. The transmitter also offers world-class overpressure protection and full compliance with SIL 2/3 requirements for safety instrumented systems-1-11.

Agency Approvals

The Honeywell STD815 Differential Pressure Transmitter carries multiple international certifications, including:

FM, CSA, ATEX, IECEx, NEPSI, KOSHA, EAC, CCoE, UATR, SAEx, INMETRO

Marine approvals from ABS, BV, DNV, KR, and LR

Explosion-proof, Intrinsically Safe, and Non-incendive classifications available

These approvals ensure that the Honeywell STD815 Differential Pressure Transmitter can be deployed in hazardous locations worldwide with full regulatory compliance-1-11.

Modular Design and Maintenance

The Honeywell STD815 Differential Pressure Transmitter employs a fully modular design architecture that significantly reduces maintenance and inventory costs. Meter bodies, electronic modules, and display indicators can be replaced or added in the field without affecting overall performance or approval body certifications. Each meter body is uniquely characterized to provide in-tolerance performance over a wide range of application variations in temperature and pressure. Due to Honeywell’s advanced interface design, electronic modules may be swapped with any electronics module without losing in-tolerance performance characteristics-3.

Configuration and Integration

Configuration Tools

The Honeywell STD815 Differential Pressure Transmitter can be configured using multiple methods:Three externally accessible buttons – For local configuration without additional tools

Honeywell Versatilis Configurator – Handheld device for two-way communication

Honeywell Field Device Manager (FDM) Software – PC-based configuration and device management

FDM Express – Streamlined software for HART and Fieldbus device configuration

Compatibility

The Honeywell STD815 Differential Pressure Transmitter is fully tested and compliant with Experion® PKS, providing the highest level of compatibility assurance and integration capabilities. The transmitter is also compatible with any standards-compliant handheld configuration device, ensuring flexibility in mixed-vendor environments-3-44.

Application Suitability

The Honeywell STD815 Differential Pressure Transmitter is ideally suited for a wide spectrum of measurement applications requiring high accuracy and reliability. The 100 inH₂O differential pressure range with 0.5 inH₂O minimum span makes the Honeywell STD815 Differential Pressure Transmitter particularly well-suited for:

Custody transfer applications requiring high accuracy measurement

Energy and material balance calculations

Flow measurement with primary flow elements (orifices, venturis, nozzles)

Hydrostatic tank gauging in closed vessels

Furnace combustion airflow rate monitoring and control

Filter monitoring and differential pressure across filtration systems

Pump and compressor performance monitoring

Heat exchanger and condenser differential pressure monitoring

The Honeywell STD815 Differential Pressure Transmitter is a member of the comprehensive ST800 family, which includes absolute pressure transmitters (STA800), gauge pressure transmitters (STG800), flange mount pressure transmitters (STF800), and remote diaphragm seal transmitters (STR800), providing a complete pressure measurement solution for any process application-2.

Warranty and Support

The Honeywell STD815 Differential Pressure Transmitter is available with an optional 15-year warranty, reflecting Honeywell’s confidence in the long-term reliability and performance of the SmartLine platform. For complete datasheets, installation manuals, and custom configuration inquiries, contact your authorized Honeywell technical sales representative for detailed selection guidance.