Honeywell T901Px1A Inert Gas Pressure & Temperature Transmitter for Liquid Cargo

Inert gas pressure and temperature transmitter: T901-Px1A series technical analysis and application

In the modern transportation and storage of liquid goods, especially in high-risk environments such as oil tankers, chemical tankers, and liquefied gas carriers, accurate and reliable pressure and temperature monitoring is the core link to ensure safety and operational efficiency. The T901-Px1A series inert gas pressure and temperature transmitter launched by Honeywell Marine is a high-performance integrated monitoring device designed for this demanding application scenario.

Product Overview

The T901-Px1A series transmitter is an intelligent sensor that integrates pressure and temperature measurement, designed specifically for liquid cargo monitoring systems. Its most significant feature is that the equipment can be directly connected to the radar system, and only one installation is needed to simultaneously obtain the two key parameters of pressure and temperature, greatly simplifying the system integration process and reducing installation and maintenance costs.

The design of this device fully considers the complexity of the marine environment and has excellent corrosion resistance and vibration resistance. Its modular structure not only enhances the maintainability of the equipment, but also provides users with the possibility of flexible configuration, which can adapt to different sizes and types of liquid cargo holds.

Core technical specifications

1. Pressure measurement

T901-Px1A adopts an absolute pressure sensor with a measurement range of 800 to 2000 mbar (absolute value), and an accuracy of ± 0.3% FS (full range) at 20 ℃ environment. Its output signal is 0.5 to 2.5 Vdc, using a three wire connection method. The maximum allowable overvoltage of the device is 4000 mbar (absolute value), and the supply voltage is 5 Vdc.

This pressure sensor adopts a ceramic diaphragm, which has good corrosion resistance and is particularly suitable for salt spray environments. The pressure sensor is designed to be detachable, making it easy for users to regularly clean the pressure interface and ensure long-term stable operation.

2. Temperature measurement

The temperature measurement part adopts PT100 Ω (at 0 ℃) platinum resistance temperature sensor, which meets the accuracy standard of IEC 751 Class B. Each transmitter can be equipped with 1 to 3 temperature probes, covering a measurement range of -46 ℃ to+250 ℃, meeting the temperature monitoring needs of the vast majority of liquid goods during transportation and storage.

The temperature probe also adopts a three wire connection to ensure the stability and accuracy of signal transmission. The multi probe configuration enables the equipment to achieve multi-point temperature monitoring in the same cargo hold, providing more accurate temperature data for computer systems, thereby more accurately correcting liquid density parameters and improving cargo measurement accuracy.

Environmental adaptability and safety certification

1. Intrinsic safety and explosion-proof certification

The T901-Px1A series transmitter has passed the International Electrotechnical Commission Explosion proof Certification (IECEx) and the European Union Explosion proof Directive (ATEX) certification, complies with the II 1 G D Ex ia IIC or IIB T6 Ga standards, and is suitable for Zone 0 hazardous areas. Its dust explosion-proof level is Ex ia IIIC T80 ° C Da, with IP66/IP67 protection level, and can operate safely in harsh industrial and marine environments.

2. Working and storage temperature

The working environment temperature range of the equipment is -35 ℃ to+70 ℃, and the storage temperature range is -55 ℃ to+85 ℃. It can adapt to extreme climate conditions worldwide and ensure stable operation in complex environments such as high temperature, low temperature, and humidity.

Materials and Structural Design

1. Highly corrosion-resistant materials

The housing, temperature sensor, and pressure sensor body of T901-Px1A are all made of 316L stainless steel material, which has excellent resistance to seawater corrosion. The pressure sensor diaphragm is made of ceramic material, which further enhances the sensor's corrosion resistance and long-term stability.

2. Modular design

The modular design of this device is one of its major highlights. The pressure sensor part can be separated from the main body, making it easy for users to clean and maintain the pressure interface without disassembling the entire transmitter. This design not only reduces maintenance difficulty, but also minimizes system downtime caused by maintenance.

Product Model and Configuration

The T901-Px1A series offers three main models, which users can choose according to their actual application scenarios:

T901-P11A: Equipped with 1 temperature sensor and 1 pressure sensor

T901-P21A: Equipped with 2 temperature sensors and 1 pressure sensor

T901-P31A: Equipped with 3 temperature sensors and 1 pressure sensor

The standard length of temperature probes includes 1 meter, 2 meters, 3 meters, 5 meters, 8 meters, 15 meters, etc., and can also be customized according to customer needs. In addition, users can also choose BV2 or BV3 flexible hoses to adapt to different cable diameters and have obtained certification from major classification societies.

Installation and connection method

1. Process connection

T901-Px1A adopts standard process connection interface, which is convenient for docking with valves or pipeline systems of various liquid cargo tanks. It has excellent sealing performance and can withstand high pressure and severe vibration environments.

2. Electrical connection

The electrical part adopts a three wire output interface, supporting 0.5 to 2.5 Vdc analog signal output, making it easy to integrate with radar systems, PLCs, or data acquisition systems. The device is powered by 5 Vdc and has low power consumption, making it suitable for use in intrinsic safety systems.

Supporting technical documents

For the convenience of users in installation, debugging, and maintenance, Honeywell Marine provides complete technical documentation for this series of products, including:

Installation Manual (MI5016): Detailed instructions on the mechanical and electrical installation steps of the equipment

Technical Manual (MT5016): Provides complete technical parameters and performance curves

Maintenance Manual (MM5016): Includes daily maintenance, troubleshooting, and component replacement guidance

Summary of Application Scenarios and Advantages

The T901-Px1A series transmitter is widely used in the following scenarios:

Monitoring of liquid cargo tanks in oil tankers and chemical tankers

Inert gas system of liquefied gas transport ships

Remote monitoring system for port storage tank area

Monitoring of hazardous areas on offshore engineering platforms

Its main advantages include:

Integrated design: dual monitoring of pressure and temperature can be achieved in one installation, saving installation space and time

High precision and stability: pressure ± 0.3% FS, temperature meets IEC 751 Class B standard

Intrinsic Safety Certification: Suitable for Zone 0 hazardous areas, with international explosion-proof certification

Modular structure: easy to maintain and clean, improving system availability

Multi probe configuration: supports multi-point temperature monitoring, improves density correction accuracy

Corrosion resistant material: 316L stainless steel and ceramic diaphragm, suitable for marine salt spray environment

Comprehensive documentation support: providing a complete set of installation, technical, and maintenance manuals for easy user operation