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JC-G/MS
JIECHUANG
This product series is SIL2 safety certified, providing verified functional safety for critical control loops in hazardous environments. The heavy-duty exterior housing offers a reassuringly solid metallic feel, engineered to withstand intense physical wear in industrial plants.
The diaphragm box of the JC-G/MS series dual-flange transmitter is designed to prevent solids, precipitative liquids, and high-temperature media from directly entering the transmitter's pressure sensor assembly. This specific physical barrier helps avoid measurement inaccuracies or direct thermal and mechanical damage to the sensitive internal sensor. Pressure is transmitted using carefully selected fill fluids like silicone oil between the smooth, corrosion-resistant diaphragm and the transmitter body, ensuring precise pressure transfer without fluid contamination.
The JC-G/MS series dual-flange transmitter is used to measure the level, density, pressure, and flow of liquids, gases, or steam, and converts these measurements into a stable 4-20mADC HART current signal output. It can communicate with a HART communicator for configuration, monitoring, and more, allowing operators to execute remote diagnostics and lower the frequency of manual on-site inspections.
Differential pressure, level
Lower Limit: Starting from -100% URL (continuously adjustable)
Upper Limit: Up to +100% URL (continuously adjustable)
Table 1: Correspondence Table between Range Codes and Range | |||
Range Codes | Minimum Range | Maximum Range | Rated Pressure (Maximum) |
B | 1 kPa | 6 kPa | Rated Pressure of Remote Transmission Flange |
C | 4 kPa | 40 kPa | |
D | 25 kPa | 250 kPa | |
F | 200 kPa | 300 kPa | |
Table 2: Correspondence Table between Remote Transmission Flange and Minimum Range | |||
Flange | Nominal Diameter | Minimum Range | |
Single-Side Remote Transmission | Double-Side Remote Transmission | ||
Flat type | DN 50/2" | 10 kPa | 10 kPa |
DN 80/3" | 6 kPa | 2 kPa | |
DN 4" | 6 kPa | 2 kPa | |
Insertion type | DN 50/2" | 16 kPa | 16 kPa |
DN 80/3" | 6 kPa | 2 kPa | |
DN 4" | 6 kPa | 2 kPa | |
note: “The minimum range of the remote transmitter should be the larger of the minimum ranges in Table 1 and Table 2. The adjusted range must not be less than the minimum range. The maximum range of the remote transmitter should be the smaller of the maximum range of the transmitter body and the rated pressure of the liquid flange.”
Output Signal
2-wire, 4-20mA DC HART output, digital communication, HART protocol superimposed on the 4-20mA DC signal. This active digital communication framework allows for direct, reliable integration with modern DCS/PLC automation systems. Output signal limits: Imin = 3.8mA, Imax = 20.5mA
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
Amplifier component damping constant is 0.1s; sensor and remote flange time constant is 0.2 to 6s, depending on the sensor range, range ratio, capillary length, and fill fluid viscosity. This immediate signal conversion enables precise control in fast-changing fluid networks. Additional adjustable time constant: 0.1 to 60s.
The transmitter body is versatile in mounting, allowing installation in any orientation.
Ideally, position the process flange axis vertically to prevent correctable zero shifts due to position deviations.
The housing offers 360° rotation flexibility, providing a tactile adjustment mechanism that simplifies field wiring and viewing angles without stressing internal cables.
Ensure the remote flange connects to the matching flange with suitable soft gaskets, bolts, and nuts.
Capillary bending should adhere to a minimum radius of 75mm, with no winding permitted, to maintain unimpeded fluid dynamics inside the capillary tube.
For dual flange remote transmitters, maintain consistent ambient temperature during installation of capillary components and remote flanges. This strict temperature consistency prevents measurement errors caused by unequal thermal expansion.
Minimum: depends on the fill fluid
Maximum: 85°C
With LCD display and fluororubber sealing ring: -20 to 65°C
Minimum: depends on the fill fluid
Maximum: 85°C
0 to 100%
-30 to 400℃
Table 3: Relationship Table of Fill Fluid, Operating Temperature, and Minimum Operating Static Pressure | ||||
Fill Fluid | Silicone Oil (S) | High-Temp Silicone Oil (H) | Ultra-High-Temp Silicone Oil (U) | Vegetable Oil (V) |
Density(25℃) | 960 kg/m³ | 980 kg/m³ | 1020 kg/m³ | 937 kg/m³ |
Operating Temperature Range | -30 ~ 200℃ | -10~ 350℃ | -10 ~ 400℃ | 0 ~ 250℃ |
Temperature | Operating Static Pressure Range (Absolute Pressure in kPa) | |||
20℃ | > 10 | > 10 | > 10 | > 25 |
100℃ | > 25 | > 25 | > 25 | > 50 |
150℃ | > 50 | > 50 | > 50 | > 75 |
200℃ | > 75 | > 75 | > 75 | > 100 |
250℃ | > 100 | > 100 | > 100 | |
350℃ | > 100 | > 100 | ||
400℃ | > 100 | |||
Note: Special design may be required for operating conditions beyond the specified temperature and static pressure range.
From 3.5kPa absolute pressure up to the rated pressure; protection pressure can exceed 1.5 times the rated pressure.
Low-pressure side is the transmitter body's rated pressure, high-pressure side is the remote flange's rated pressure, with the possibility of correctable zero drift. This heavy-duty tolerance protects the internal sensing mechanisms from unexpected pressure surges during process upsets.
Single-side remote transmission:
DN50/2": approximately 7 to 10kg
DN80/3": approximately 8 to 11kg
DN4": approximately 9 to 12kg
Dual-side remote transmission:
DN50/2": approximately 10 to 16.5kg
DN80/3": approximately 12 to 18kg
DN4": approximately 14 to 21kg.
DN50PN25: approximately 6kg
DN80PN25: approximately 8kg
DN100PN25: approximately 10kg
Explosion-proof permission: Ex d IIC T6
Intrinsic safety permission: Exia IIC T4
Combined with the IP67 housing protection level, these safety certifications guarantee reliable operational security in hazardous, flammable, and explosive industrial zones without compromising measurement precision.
Power supply voltage: 24V
R < (Us-12V)/max kΩ, where 1max = 23mA
Maximum power supply voltage: 36VDC
Minimum power supply voltage: 9VDC (low voltage version), 13.5VDC (backlit LCD display), LED display
250 ~ 600Ω
Measurement diaphragm box: Stainless Steel 316L
Diaphragm: Stainless Steel 316L, Hastelloy Alloy C, Tantalum, Titanium
Process flange: Stainless Steel 304
Fill fluid: Silicone oil, high-temperature silicone oil, ultra-high-temperature silicone oil, vegetable oil
Sealing ring: Nitrile rubber (NBR), Fluororubber (FKM), Polytetrafluoroethylene (PTFE)
Transmitter housing: Aluminum alloy, surface coated with epoxy resin; Stainless Steel housing optional
Housing sealing ring: Nitrile rubber (NBR)
Nameplate: Stainless Steel 304
This extensive selection of materials allows for precise customization. By pairing specialized metals like Hastelloy or Tantalum with appropriate fill fluids ranging from ultra-high-temperature silicone to food-grade vegetable oil, this transmitter perfectly matches the stringent hygiene and corrosion-resistance requirements of the chemical processing, food, and pharmaceutical industries.
M20×1.5 or NPT1/2 internal thread
Flange
IP67
This intelligent differential pressure transmitter is engineered to solve complex measurement challenges across diverse sectors. It is exceptionally suited for monitoring high-temperature steam in power generation, managing high-viscosity liquids in petrochemical refining, and handling easily crystallizing or highly corrosive media in chemical processing plants. The durable physical architecture ensures long-term stability, reducing the frequency of physical interventions in hard-to-reach pipelines.
When routine checks are necessary, the device offers a streamlined maintenance experience. Technicians can utilize a compatible HART communicator for convenient remote calibration. Tasks such as pressure zeroing, current loop testing, and precise sensor fine-tuning can be executed digitally. This allows facility operators to perform rapid on-site calibrations and troubleshoot potential faults without the need to physically disassemble the unit, thereby maximizing uptime and operational efficiency.
