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Model 266NRH is a high overload absolute pressure transmitter suitable for measuring liquid, gas or steam flow as well as level, pressure and density characterized by the remote seal construction.
Thanks to Taylor’s “All-Welded” technology in remote seal manufacturing as well as to the longstanding expertise,
266NRH can offer unmatched total performances and a wide selection of options such as fill fluid, diaphragm material,
capillary protection and mounting connections.
ABB, leader in severe process measurements, is able to provide the right solution for the most critical process media
at extreme ambient and process conditions. The long-term stability and its proven reliability make of 266NRH the best
application solution for absolute pressure measurements. This transmitter features in-field replaceable electronics
module that thanks to the auto-configuration functionality dramatically improves plant productivity. Its intuitive
plug-and-play display with easy setup procedure really helps users by saving time and lowering maintenance and
inventory costs. Moreover, the innovative TTG (Through The Glass) technology allows users to configure the instruments
in the field without removing the windowed front cover and consequently to save a lot of time.
SIL2/SIL3 certification issued by TÜV Nord according to IEC 61508 represents another key-feature within 266 pressure
transmitter portfolio. This certification is a real guarantee of protection and makes of 266NRH the smartest fit in
Safety-critical loops.
266NRH features WirelessHART communication protocol allowing a shorter installation times by eliminating complex wired
infrastructures, and lower overall implementation costs of process measurement.
266NRH battery life is about 10 years at 32 sec. update rates, delivering a very cost effective and reliable solution
to monitor your process assets.

Data
266NRH: smartness beyond performances.
- Base accuracy : ±0.075%
- Span limits: 1.1 ...16000 kPa abs.; 8 mm HG ... 2320 psia
- Multiple protocol availability – provides integration with HART®, PROFIBUS PA, FOUNDATION Fieldbus and WirelessHART platforms offering interchangeability and transmitter upgrade capabilities
- Full compliance with PED Category III

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Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.
Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.
| Pressure Types | Gauge, absolute, negative pressure, differential pressure |
|---|---|
| Measuring Range | From low differential pressure to high pressure ranges up to 100 MPa, depending on model |
| Output Signals | 4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options |
| Accuracy | Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS |
| Process Connection | M20 x 1.5, G1/4, G1/2, NPT and customized thread connections |
| Wetted Materials | Stainless steel, 316L diaphragm and corrosion-resistant sealing options |
| Media | Water, oil, gas, air, steam and compatible liquid or gas media |
| Applications | Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems |
A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.
Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.
Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.
Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.