Product Description
Honeywell STD720 SmartLine Differential Pressure Transmitter: Comprehensive Product Description
1. Overview
The Honeywell STD720 is a high-performance differential pressure transmitter within the SmartLine® ST700 series, designed for precision measurement and control in critical industrial applications. As part of Honeywell's SmartLine family, the STD720 integrates advanced sensor technology, robust construction, and smart diagnostics to deliver reliable performance in demanding environments such as oil and gas, power generation, chemical processing, and HVAC systems. Its modular design, compliance with international safety standards, and compatibility with Honeywell's Experion® PKS control systems make it a versatile solution for monitoring differential pressure, flow, and level across diverse processes
Detailed Photos
2. Key Features
2.1 Sensor Technology and Performance
Advanced Piezoresistive Sensor: The STD720 employs ion-implanted silicon sensor technology combined with on-chip temperature and static pressure compensation. This enables high accuracy (±0.05% of span) and long-term stability (±0.02% of URL per year over 10 years), even under fluctuating process conditions
Wide Turndown Ratio: With a turndown ratio of up to 100:1, the transmitter adapts to varying process requirements without sacrificing precision .
Fast Response Time: A rapid response time of 100 ms ensures real-time data acquisition for dynamic processes
2.2 Communication and Output Options
Output Signals:
4-20 mA analog output with HART® 7.0 protocol compatibility.
Honeywell Digital Enhanced (DE) protocol for seamless integration with Experion® PKS and third-party control systems
Diagnostics: Onboard diagnostics provide alerts for critical faults (e.g., sensor communication errors, electronic module failures) and non-critical issues (e.g., PV out-of-range, loop current noise), enhancing predictive maintenance capabilities .
2.3 Robust Design and Safety
Dual-Seal Construction: Compliant with ANSI/NFPA 70-202 and ANSI/ISA 12.27.0, the STD720 features a dual-seal design to prevent leakage and ensure operational safety in hazardous environments
Material Durability:
Wetted Parts: 316L stainless steel, Hastelloy C-276, or Monel 400 options for corrosion resistance .
Housing: Polyester powder-coated aluminum (NEMA 4X/IP66/IP67 rated) or optional stainless steel for extreme conditions
Overpressure Protection: Rated for up to 31.5 MPa static pressure, ensuring resilience against process surges .
2.4 Modularity and Flexibility
Field-Replaceable Components:
Electronics Module: Allows upgrades or replacements without recalibration.
LCD Display: A modular LCD (9.95 mm × 4.20 mm) supports 0°-270° rotation and displays units such as kPa, psi, bar, and inH2O .
Diaphragm Seals: Customizable for specific media compatibility (e.g., CTFE fluorocarbon oil for aggressive chemicals)
Product Parameters
| Parameter |
Specification |
| Model |
STD720 |
| Measurement Range |
-400 to 400 inH2O (-1000 to 1000 mbar) |
| Accuracy |
Up to ±0.05% of span (standard); ±0.04% of span (optional) |
| Stability |
±0.02% of URL (Upper Range Limit) per year over 10 years |
| Response Time |
Adjustable down to 100 ms |
| Output Signal |
4-20 mA + HART® 7.0 / Honeywell Digital Enhanced (DE) protocol |
| Power Supply |
24 VDC |
| Material |
Polyester powder-coated aluminum (standard); 316L SS, Hastelloy C-276 optional |
| Ingress Protection |
IP66/IP67 |
| Certifications |
SIL 2/3 compliant, FM, CSA, ATEX, IECEx |
| Media Compatibility |
Liquids, gases, steam (oil, water, air) |
| Display |
LCD with configurable units |
| Warranty |
12 months (standard); extended warranties available |
4. Applications
The STD720 is engineered for diverse industrial scenarios:
Flow Measurement: Monitors differential pressure across orifice plates or Venturi tubes in pipelines.
Level Monitoring: Hydrostatic tank gauging for liquids in storage tanks.
Filter and Pump Protection: Detects clogging or cavitation in HVAC and process systems.
Energy Management: Optimizes combustion airflow in boilers and furnaces .
5. Installation and Maintenance
Mounting: Compatible with 2-inch (50 mm) vertical or horizontal pipes using standard brackets (carbon steel or stainless steel).
Process Connections: 1/4" NPT or 1/2" NPT (DIN-compliant options available) .
Calibration: Field-configurable via HART handheld communicators or Honeywell's Field Device Manager (FDM) software .
Warranty: Standard 12-month warranty, extendable to 4 years for critical applications
6. Competitive Advantages
Interoperability: Fully tested with Experion® PKS, reducing integration costs and downtime .
Scalability: Modular architecture minimizes inventory needs (e.g., shared components across ST700 series models) .
Global Support: Honeywell's worldwide service network provides technical assistance and rapid spare parts delivery
7. Ordering Information
Model Code: STD720-E1AS4AS-1-A-ADE-13S-B-31A0 (example configuration).
Optional Accessories:
Remote diaphragm seals (STR735D/STR745G).
Explosion-proof or intrinsically safe housings.
Foundation Fieldbus communication modules
8. Conclusion
The Honeywell STD720 SmartLine Differential Pressure Transmitter exemplifies innovation in process instrumentation, combining precision, durability, and smart functionality. Its adherence to global standards, modular design, and diagnostic capabilities make it a preferred choice for industries requiring reliable pressure measurement solutions. For detailed configurations or application-specific inquiries, consult Honeywell's technical documentation or authorized distributors
Company Profile
KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales,technical services, and supporting equipment supply of specialized companies. The main products are flow meters, level meters,temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems, and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental protection, plastics, food, printing, tobacco, textile, dyeing, and other fields.
Packaging & Shipping
The packaging and transportation of instrumentation in global trade hinges on a synergy of advanced materials, rigorous testing, regulatory compliance, and smart logistics. By adopting hybrid structural designs, leveraging real-time monitoring technologies, and prioritizing sustainability, exporters can ensure the safe, efficient, and cost-effective delivery of precision instruments. Continuous innovation in materials science and IoT integration will further redefine industry standards, enhancing resilience in an increasingly interconnected market.
FAQ
Q: How long will you give me the reply?
A: We will reply to you as soon as we see the information.
Q: What is the delivery time?
A: Our delivery time is within 3-7 days after we get your payment;
for large qty mass orders, the time should be confirmed again for you.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.
Q: How about the payment terms?
A: You can choose T/T.
Q: Do you provide samples?
A: Yes, we have materials in stock to help you to get the samples as soon as we can.
Q: What is the MOQ?
A:1PC.
Q: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices with more bigger size orders.
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