JCMT Multivariable Transmitter with RS485

Multi variable pressure transmitter JCMT is suitable to measure liquid, gas, or steam flow and differential pressure. RP1005 outputs a 4~20mADC / Modbus RS485 / HART / Pulse signal corresponding to the measured flow or differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored.

JCMT Multivariable Transmitter with RS 485

The multi variable pressure transmitter JCMT is suitable to measure liquid, gas, or steam flow and differential pressure. JC1005 outputs a 4~20mADC / Modbus RS485 / Pulse signal corresponding to the measured flow or differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via different communications. Other key features include quick response, remote set-up using communications, selfdiagnostics and optional status output for pressure high/low alarm.

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Technical Parameter for  Multi variable pressure transmitter 


Reference Accuracy of Calibrated Span (includes terminal-based linearity, hysteresis, and repeatability)± 0.075%/± 0.01%

If TD>10 (TD=URL/SPAN): ±(0.0075×TD)%/ ±(0.01×TD)%

Ambient Temperature Effects


Every 10℃ is ±0.08% ×Span (TD=1)

-40℃~-20℃ & 65℃~85℃:


Static Pressure Effects


Overpressure Effects: ±0.1%×Span /10MPa。

Stability: ±0.1%×Span /3 years

Power Supply Effects

±0.001% /10V (12~42V DC)

Measuring Temperature


Zero Adjustment Limits

Zero can be fully elevated or suppressed, within the lower and upper range limits of the capsule.

External Zero Adjustment

External zero is continuously adjustable with 0.01% incremental resolution of span. Re-range can be done locally using the range setting switch.

Mounting Position Effects

Rotation in diaphragm plane has no effect. Tilting up to 90 degree will cause zero shift up to 0.4 kPa which can be corrected by the zero adjustment.


Two wire 4~20mADC (Output range: 3.9 mA to 20.5 mA.),

Modbus RS485, HART FSK protocol on 4~20mADC signal,  Pulse signal output .

Failure Alarm (the mode can be selected)

Low Mode (min): 3.7 mA

High Mode (max): 21 mA

No Mode (hold): Keep the effective value before the fault. Note: The standard setting of failure alarm is High


Response Time

The amplifier damping constant is 0.1 sec; The sensor damping constant is 0.1~1.6 sec, it depends on the range and range compression ratio. Amplifier damping

time constant is adjustable from 0.1 to 60 sec by software and added to response time.

UpTime < 15s

Ambient Temperature Limits

-40 to 85°C

-20 to 65°C with LCD display or fluorine rubber sealing

Storage and Transportation Temperature Limits

-50 to 85°C; -40 to 85°C with LCD display

Working Pressure Limits (Silicone oil)

Maximum working pressure: 0.25MPa, 2MPa, 10MPa ,40MPa

Static Pressure Limits

3.5kPa abs. to maximum working pressure.

One-way Overload Pressure Limit

The maximum one-way overload pressure is maximum working pressure.

Electromagnetic Compatibility (EMC)

Look the EMC Performance Table


Supply & Load Requirements

24 V DC supply, R≤(Us-12V)/Imax kΩ, Imax=23 mA.

Maximum voltage limited: 42VDC, Minimum voltage limited: 12VDC, 15VDC(with LCD display) 230Ω to 600Ω for digital communication

Electrical Connection

The electrical connection is made via cable entry M20x1.5.The screw terminals are suitable for wire  cross-sections up to 2.5mm2.


Wetted Parts Materials

Sensor Body: 316L stainless steel

Isolating Diaphragm:316L stainless steel / Hastelloy

C/Gold plated on 316L/FEP plated on 316L/Tantalum

Cover Flange: 316 stainless steel

Nuts and Bolts: 304 stainless steel

Process Connector: 316 stainless steel

Fill fluid: Silicone oil/Fluorinated oil

Process Connector Gasket:Perbunan(NBR)/Viton


Amplifier Housing: Aluminum with epoxy resin coat

Housing Gasket: Perbunan(NBR)

Name plate and tag:304 stainless steel

Weight: 3.3kg

Degrees of Protection: IP67

Model selection

Multi-variable Pressure Transmitter JCMT
B Reference Accuracy±0.075%
C Reference Accuracy±0.1%
B 0-200Pa~6kPa(0-20~600 mmH2O)/(0-2~60mbar)
C 0-1kPa~40kPa(0-100~4000 mmH2O)/(0-10~400mbar)
D 0-2.5kPa~250kPa(0-0.25~25 mH2O)/(0-25~2500mbar)
F 0-30kPa~3MPa(0-3~300 mH2O)/(0-0.3~30bar)
Static pressure sensor
1 0.25 MPa
2 2MPa
3 20MPa
4 40MPa
Diaphragm fill fluid
A 316L stainless steel Silicone oil
B 316L stainless steel Fluorinated oil
C Hastelloy C Silicone oil
D Hastelloy C Fluorinated oil
E Gold plated on 316L Silicone oil
F Gold plated on 316L Fluorinated oil
G FEP plated on 316L Silicone oil
T Tantalum Silicone oil
Process connections
N 7/16-20 UNF and 1/4-18 NPT female thread, No relief valve
B 7/16-20 UNF and 1/4-18 NPT female thread, Relief valves at end of flanges
U 7/16-20 UNF and 1/4-18 NPT female thread, Relief valves at the upper part of the flange side
D 7/16-20 UNF and 1/4-18 NPT female thread, Relief valve at the lower part of

the flange side

Process connector gasket
N Perbunan(NBR)
F Viton (FKM)
P Teflon (PTFE)
Special function
N None
O Degrease cleansing treatment(Oxygen measurement must be

with fluorinated oil filled capsule, Viton (FKM) gasket,

<6MPa ,<60℃)

P Anti-lightning function
Mounting bracket
N None
1 304 stainless steel
2 Carbon steel galvanized
Process connector accessory
N None
1 Stainless steel oval-shaped flange with 1/2 NPT  female thread
2 Stainless steel D-shaped connector with M20x1.5 male thread
Integral indicator
N None
1 LCD display
2 Backlit LCD display
N None
A Configure by customer table
H HART with 4~20mADC
M Modbus RS485
P Pulse signal

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