Overview
The Honeywell STD725 is a SmartLine differential pressure transmitter designed for stable and accurate pressure measurement in industrial process applications. It belongs to the SmartLine ST700 series and is suitable for monitoring differential pressure in liquid, gas, and steam systems. Honeywell positions the STD700 differential pressure series for applications ranging from furnace combustion airflow measurement to hydrostatic tank gauging, and lists the STD725 measuring range as -400 to 400 inH2O (-1000 to 1000 mbar).
Key Features
- Differential pressure measurement
- 4-20 mA output with HART communication
- Aluminum alloy housing
- Ingress protection: IP65
- 12-month warranty
- Suitable for OEM / ODM support
- SmartLine ST700 series design
- Automatic static pressure and temperature compensation
- Rangeability up to 100:1
- Fast response and onboard diagnostic capability
Honeywell’s official SmartLine ST700 materials describe the series as offering high performance, stability, reliability, and rangeability, while the STD725/735/775 datasheet lists features such as accuracy up to 0.065% of span, automatic static pressure and temperature compensation, HART 7.0 communication, and onboard diagnostics.
Applications
- Differential pressure monitoring in industrial process lines
- Flow measurement systems using differential pressure principle
- Tank level measurement with pressure-based calculation
- Boiler, energy, and utility process monitoring
- General liquid, gas, and steam process control
Honeywell states the ST700 differential pressure transmitters are used in critical process loops and high-value applications such as custody transfer, energy balances, material balances, furnace combustion airflow rate, and hydrostatic tank gauging.
Technical Notes
- Model: STD725
- Product family: Honeywell SmartLine ST700 Differential Pressure Transmitters
- Output: 4-20 mA + HART
- Pressure type: Differential Pressure
- Official series range for STD725: -400 to 400 inH2O (-1000 to 1000 mbar)