Gauge pressure transmitter 266GST

Overview

In addition to the plug-in terminal block, the 266GST features an in-field replaceable electronics module that improves plant productivity through auto-configuration functionality. Its intuitive plug-and-play display with easy setup helps users save time and reduce maintenance and inventory costs.

The innovative TTG (Through The Glass) technology allows users to configure the instrument in the field without removing the windowed front cover, which is especially useful for outdoor or hazardous-area installations.

The ABB 266GST gauge pressure transmitter is certified by TUV NORD for use in safety instrumented systems as per IEC61508. It meets the requirements for SIL2 applications in a single transmitter configuration (1oo1) and SIL3 applications in a redundant configuration (1oo2).

Typical Applications of ABB 266GST Gauge Pressure Transmitter

The 266GST is mainly used for measuring process pressure where the reference is atmospheric pressure. It is suitable for liquid, gas and steam pressure measurement in industrial process systems.

It can also be used for liquid level measurement in open tanks, where hydrostatic pressure at the bottom of the tank is converted into level. This makes it a practical choice for storage tanks, water treatment systems, chemical tanks, boiler auxiliary systems and general process pressure monitoring.

Common applications include:

• Gauge pressure measurement for liquids, gases and steam
• Open tank liquid level measurement
• Pump discharge and suction pressure monitoring
• Boiler and utility pressure measurement
• Chemical and petrochemical process pressure monitoring
• Safety-related pressure measurement loops requiring SIL capability

Why 266GST Is Suitable for Demanding Process Conditions

The 266GST is designed for applications where long-term stability and reliable field operation are important. In many industrial plants, pressure transmitters are installed in areas with temperature changes, vibration, moisture, dust or limited access. Stable measurement performance helps reduce unnecessary recalibration and maintenance work.

Its replaceable electronics module and auto-configuration function are useful for plant maintenance teams. When service or replacement is required, the transmitter can be handled more efficiently, helping reduce downtime and spare parts complexity.

The TTG operation also helps in hazardous or difficult field environments. Operators can configure the instrument through the glass cover without opening the housing, which is especially useful when it is installed outdoors or in areas where opening the enclosure is inconvenient.

Selection Information Required for Quotation

To confirm the correct ABB 266GST configuration or prepare a quotation, the following information is usually required:

• Existing model code or nameplate photo
• Measured medium
• Pressure range
• Process temperature
• Process connection type and size
• Wetted material requirement
• Output signal, such as 4–20 mA HART
• Display requirement
• Hazardous area approval requirement
• SIL requirement, if used in a safety instrumented system

If the transmitter is used for open tank level measurement, please also provide the tank height, liquid density, installation position and whether the tank is vented to atmosphere.

SIY Electric Supply Support

SIY Electric can help customers confirm ABB 266GST gauge pressure transmitter configuration based on existing model codes, datasheets, nameplate photos or process conditions. We can support replacement selection, quotation, equivalent model comparison and documentation preparation for industrial pressure measurement projects.

For project procurement or maintenance replacement, please send the model code, technical specification sheet or photos of the existing transmitter nameplate. This helps us check the pressure range, connection, output signal, approval and material configuration more accurately.