Honeywell STD725 Differential Pressure Transmitter

General Description

The Honeywell STD725 Differential Pressure Transmitter is engineered to provide accurate pressure measurements in various industrial settings. It integrates multiple sensors for process pressure measurement and onboard static pressure and temperature compensation, making it suitable for demanding applications.

1.Overview

The Honeywell STD725 Differential Pressure Transmitter is part of the SmartLine® ST700 Series. This series includes high-performance transmitters. Engineers design them for accurate, stable, and reliable differential pressure measurement in industrial processes.

The Honeywell transmitter STD725 offers high accuracy, advanced diagnostics, and strong construction. It meets demanding needs for pressure monitoring, control, and data collection.

The STD725 SmartLine Differential Pressure Transmitter uses advanced digital electronics and HART® communication (version 7.0). This feature helps users easily connect it to new or existing control systems.

Engineers designed the Honeywell differential pressure transmitter STD725 for long-term stability and accuracy. Perfect for continuous monitoring and important process control. This device works well in industries like oil and gas, chemicals, and water treatment.

The Datasheet for STD725 – SmartLine ST700 Series shows its great 0.05% accuracy, quick response, and 100:1 rangeability. This means it can easily handle the most demanding pressure measurement tasks. The Honeywell Smart Differential Pressure Transmitter Series STD725 has a modular design and flexible options. A new generation of reliable and competent field instruments exists.

2.Technical Specifications

l Model: Honeywell STD725

l Product Line: SmartLine® ST700 Series

l Type: Smart Differential Pressure Transmitter

l Accuracy: Up to ±0.05% of span

l Stability: ±0.02% of URL per year (for 10 years)

l Rangeability (Turndown Ratio): Up to 100:1

l Response Time: As fast as 100 milliseconds

l Communication Protocols: HART® (Version 7.0)

l Supply Voltage: 10.8 to 42.4 VDC

l Operating Temperature Range: -40°C to +85°C (-40°F to +185°F)

l Pressure Ranges: Multiple ranges available depending on process requirements

l Output Signal: 4–20 mA with digital communication overlay

l Mounting: Pipe, panel, or manifold-mounted with standard accessories

l Compliance: CE, FM, CSA, ATEX, and SIL2 certified

3. Key Features of Honeywell STD725 Transmitter

A. High-Performance Measurement:

B. The STD725 Smart Differential Pressure Transmitter offers excellent performance. It has an accuracy of up to 0.05%. It also provides long-term stability of 0.02% of URL per year. This ensures consistent and precise process readings.

C. Advanced Compensation Technology:

D. Equipped with automatic static pressure and temperature compensation, it guarantees accurate output even under varying ambient and process conditions.

E. Smart Modular Design:

F. The Honeywell transmitter STD725 features a modular architecture for easy upgrades, calibration, and maintenance, minimizing downtime.

G. External Configuration Capability:

H. You can adjust zero, span, and range directly in the field. You can also do this remotely with a HART communicator.

I. Dual Seal Safety Design:

J. Incorporates Integral Dual Seal construction, ensuring compliance with stringent safety standards for hazardous area applications.

K. Digital Communication and Integration:

L. Provides seamless integration with Honeywell Experion® control systems and other HART-based control platforms, supporting two-way communication for configuration, diagnostics, and monitoring.

M. Durability and Reliability:

N. This manufacturer designs this transmitter for harsh conditions. It resists corrosion and can handle vibrations. It also has a 10-year stability, which lowers the total cost of ownership.

O. Versatile Installation Options:

P. Compatible with surface mount or manifold installations, adaptable for both compact and large-scale system designs.

4. Applications of the Honeywell STD725 Differential Pressure Transmitter

The STD725 SmartLine ST700 Series transmitters can be used in a wide range of industrial and commercial applications, including:

Q. Process Control in Chemical and Petrochemical Plants:

R. For accurate monitoring of differential pressure in reactors, columns, and flow systems.

S. Oil and Gas Applications:

T. Ideal for pipeline pressure balancing, separator monitoring, and tank level measurement.

U. Water and Wastewater Treatment:

V. Provides reliable control and monitoring of filtration, pump, and flow processes.

W. HVAC Systems Monitoring:

X. Used to measure air and liquid flow differentials for energy efficiency optimization.

Y. Data Acquisition and Control Systems:

Z. The STD700 models, like the STD725, are great for monitoring, control, and data collection. They offer high accuracy and stability.

AA. Industrial Process Automation:

AB. Delivers real-time feedback for pressure measurement and control, ensuring consistent system performance in manufacturing and energy operations.

5. Installation Procedure (Step-by-Step)

1. Preparation

Gather the required tools (screwdrivers, wrenches, and a HART communicator).

Ensure everyone follows all safety and electrical isolation protocols.

Review the STD725 installation manual and application notes.

2. Mounting

Mount the transmitter securely using the standard Honeywell SmartLine bracket.

Align the pressure ports properly to avoid stress on the sensor.

Suitable for vertical or horizontal pipe installations or surface mount configurations.

3. Wiring

Connect power and signal wires according to the provided wiring diagram.

Ensure secure and insulated terminations.

4. Configuration

Power on the transmitter.

Use the HART communicator to set zero, span, and damping values as required.

Confirm correct calibration against known pressure references.

5. Testing

Perform loop testing to validate output accuracy.

Verify transmitter response time and stability.

6. Final Checks

Inspect for proper sealing, electrical integrity, and communication verification.

Record configuration and calibration data for maintenance records.

6. Related Part Numbers

l STD725-E1AC4AS-1-G-AHS-11S-A-10A0

l STD725-E1AC4AS-1-D-CHT-13C-B-10A0

l Honeywell Differential Pressure Transmitter STD725 – SmartLine ST700 Series

l STD700 Models – Suitable for monitoring, control, and data acquisition applications

Honeywell TC809B1008 Monitor Module

Honeywell JSM-TC809A1059C Input Monitoring Module

Honeywell JTW-BD-TC808B1041C Point-type Temperature Detector

7. Summary

The Honeywell STD725 SmartLine Differential Pressure Transmitter is a high-performance device engineered for precision, stability, and flexibility. The SmartLine ST700 Series features advanced digital communication (HART®). Reliable and modular. This makes it perfect for challenging process measurement tasks.

The Honeywell transmitter STD725 offers great measurement accuracy. It also meets the demanding requirements for pressure measurement across many industries worldwide.

The Honeywell STD725 Differential Pressure Transmitter is a leader in reliability and performance. Using it for process control, monitoring, data acquisition, and automation is easy. This transmitter sets a high standard in Smart Differential Pressure Transmitter technology.

Back to the top: Honeywell DCS