Intelligent Single Flange Differential Pressure / Pressure Transmitters 4-20mA + Hart Digital Display

Overview

The JC-G-L/H/T/J series single-flange differential/pressure transmitter is designed for accurately measuring the pressure, level, density, and flow of various media, including liquids, gases, steam, and media containing solids and precipitable liquids. These transmitters are equipped with advanced features to ensure reliable performance in industrial applications, with a special diaphragm box designed to protect the pressure sensor components from direct exposure to the medium, preventing potential damage and ensuring precise measurements.

This differential/pressure transmitter uses high-quality fill fluids, such as silicone oil, to transfer pressure signals between the sensor and the medium. These transmitters are ideally suited for industrial processes that require high-precision pressure measurement, offering an optimal solution for level measurement, density measurement, and flow measurement.

The JC-G-L/H/T/J series is equipped with 4-20mA HART digital output, providing seamless integration into automation systems for continuous monitoring, configuration, and troubleshooting. It also supports HART protocol communication, enabling remote configuration and real-time monitoring using HART handheld devices. Furthermore, this product series is certified for SIL2 safety, ensuring a high level of reliability for critical industrial applications.

Key Features and Benefits

1. Reliable Pressure Measurement
   The single-flange differential pressure transmitter offers high accuracy for pressure measurement, making it ideal for applications that require high-precision control in various industries such as oil & gas, chemical processing, and power generation. The design prevents medium ingress, ensuring longer service life and reliable performance in harsh environments.

2. Wide Measurement Range
   This differential pressure transmitter features a continuously adjustable measurement range from -100% to +100% of URL, making it suitable for a variety of applications across different industrial sectors. It can be used for measuring liquid level, density, pressure, and flow, and is compatible with media at different pressures and temperatures, including high-pressure fluids.

3. Advanced Digital Communication
   The 4-20mA HART output provides digital communication with a wide range of devices for easy integration into automated systems. It allows for seamless real-time data monitoring, parameter configuration, and maintenance checks, reducing downtime and improving operational efficiency. Additionally, the transmitter is designed to support intrinsic safety and explosion-proof certifications, making it suitable for hazardous environments.

4. Explosive-Resistant Design
   Certified with Ex d IIC T6 explosion-proof performance and Ex ia IIC T4 intrinsic safety, the JC-G-L/H/T/J series transmitter can operate safely in hazardous environments, such as those found in chemical plants, oil refineries, and mining industries.

5. Robust Construction
   The transmitter housing is made from high-strength aluminum alloy coated with epoxy resin, ensuring protection against corrosion in challenging industrial conditions. The measurement diaphragm box is crafted from Stainless Steel 316L, providing a durable solution for applications requiring high resistance to corrosion.

Technical Parameters

● Measurement Parameters: Differential pressure, level, pressure

● Measurement Range:

• Lower limit: -100% of URL (continuously adjustable)

• Upper limit: Up to +100% of URL (continuously adjustable)

● Measurement Range

note: “The minimum range of the differential pressure transmitter should be the larger of the minimum ranges in Tables 1 and 2. The adjusted range must not be less than the minimum range. The maximum range of the transmitter should be the smaller of the maximum range of the transmitter body and the rated pressure of the flange.”

● Output Signal

2-wire, 4-20mA DC HART output, digital communication, HART protocol superimposed on the 4-20mA DC signal. Output signal limits: Imin = 3.8mA, Imax = 20.5mA

● Alarm Current (mode adjustable)

• Low alarm mode (minimum): 3.6mA

• High alarm mode (maximum): 21mA

• No alarm mode (hold): maintains the valid current value before the fault

• Standard alarm current setting: high alarm mode

● Installation Conditions

• The liquid level flange transmitter can be securely mounted in any position.

• Ideally, position the process flange axis vertically to prevent correctable zero shifts due to position deviations.

• The housing can rotate up to 360°.

● Environmental Conditions

• Ambient Temperature

• Minimum: Depends on the fill fluid

• Maximum: 85°C

• With LCD display and fluororubber sealing ring: -20 to 65°C

● Storage/Transportation Temperature

• Minimum: Depends on the fill fluid

• Maximum: 85°C

● Relative Humidity: 0 to 100%

● Medium Temperature Limits: -30 to 180°C

● Transmitter Body Pressure Limits

From 3.5kPa absolute pressure up to the rated pressure, with protection pressure allowed to be greater than 1.5 times the rated pressure, applied to both sides of the transmitter.

● Explosion-proof Performance

• Explosion-proof permission: Ex d IIC T6

• Intrinsic safety permission: Ex ia IIC T4

● Permissible operating temperature range: -40°C to 65°C

● Power Supply Voltage

• 10.5 ~ 42V DC (Operating State)

• 10.5 ~ 30V DC (Intrinsically Safe)

• 10.5 ~ 30V DC (Digital Communication)

• 10.5 ~ 30V DC (Intrinsically Safe for Digital Communication)

● Load

• 0 ~ 1335Ω (Operating State)

• 250 ~ 600Ω (Digital Communication)

● Materials

• Measurement diaphragm box: Stainless Steel 316L

• Diaphragm: Stainless Steel 316L, Hastelloy Alloy C, Tantalum, FEP, PFA, PTFE coated

• Process flange: Stainless Steel 304

• Fill fluid: Silicone oil, vegetable oil

• Sealing ring: Nitrile rubber (NBR), Fluororubber (FKM), Polytetrafluoroethylene (PTFE)

• Transmitter housing: Aluminum alloy material, surface coated with epoxy resin; Stainless Steel housing optional

• Housing sealing ring: Nitrile rubber (NBR)

• Nameplate: Stainless Steel 304

● Electrical Connection

• M20×1.5 or NPT1/2 internal thread

• NPT1/4 internal thread on the low-pressure side of the transmitter

● Process Connection: Flange mounting on the high-pressure side of the transmitter

● Housing Protection Level: IP67

Conclusion

The JC-G-L/H/T/J series single-flange differential/pressure transmitters offer unmatched precision, versatility, and safety, making them ideal for demanding industrial environments. With SIL2 safety certification, explosion-proof performance, and HART digital output, this transmitter delivers reliable, real-time monitoring for enhanced control over industrial processes. Whether you are measuring level, pressure, density, or flow, the JC-G-L/H/T/J series transmitter provides the accuracy and reliability needed for optimal performance in critical applications.