Focp smart monocrystalline silicon differential pressure transmitter

Focp smart monocrystalline silicon differential pressure transmitter

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Performance characteristics of monocrystalline silicon pressure transmitter
Committed to provide solution for field instruments

The differential pressure transmitter Focp is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. 1001- B/C outputs a 4 to 20 mA DC HART signal corresponding to the measured differential pressure. Other key features include quick response, remote set-up using communications, self-diagnostics and optional status output for pressure high/low alarm.
The differential pressure transmitter includes two functional units:
—Main unit
—Auxiliary Unit
The main unit includes a sensor and process connection. The completely welded sensor module is a twin-chamber system with an integral overload diaphragm, a temperature sensor and the silicon differential pressure sensor. The temperature sensor as a temperature compensated reference value to compensate for the temperature drift.


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Committed to provide solution for field instruments

Reference Accuracy of Calibrated Span (includes terminal-based linearity, hysteresis, and repeatability)
± 0.075%
If TD>10 (TD=URL/SPAN): ±(0.0075×TD)% The square root accuracy is 1.5 times of reference accuracy of calibrated span.
Ambient Temperature Effects
Span Code -20℃~65℃
A ±(0.45×TD+0.25)%×Span
B ±(0.30×TD+0.20)%×Span
C/D/E ±(0.20×TD+0.10)%×Span
Span Code -40℃~-20℃ & 65℃~85℃
A ±(0.45×TD+0.25)%×Span
B ±(0.30×TD+0.20)%×Span
C/D/E ±(0.20×TD+0.10)%×Span
Static Pressure Effects
Span Code Static Pressure Effects
A ±(0.15%URL+0.10%Span)/4MPa
B ±(0.10%URL+0.075%Span)/16MP
C/D/E ±(0.05%URL+0.05%Span)/16MPa
Overpressure Effects
Span Code Overpressure Effects
A ±0.2%×Span/4MPa
B ±0.2%×Span/16MPa
C/D/E ±0.1%×Span/16MPa
Span Code Stability
A ±0.5%×Span/1year
B ±0.2%×Span/1 year
C/D/E ±0.1%×Span/1 year
Power Supply Effects
±0.001% /10V (12~42V DC)
Span and Range Limits
Span/ Range Limits kPa mbar
A Span 0.1~1 1~10
Range Limits -1~1 -10~10
B Span 0.2~6 2~60
Range Limits -6~6 -60~60
C Span 0.4~40 4~400
Range Limits -40~40 -400~400
D Span 2.5~250 25~2500
Range Limits -250~250 -2500~2500
E Span 20~2000 0.2~20 bar
Range Limits -500~2000 -5~20bar
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 to 20 mA DC output with digital communications, linear or square root programmable. HART FSK protocol is option superimposed on the 4 to 20 mA signal. Output range: 3.9 mA to 20.5 mA.
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 Mode.
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 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: 16MPa, 25MPa, 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, 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.
Process Connection
Flange with fixing thread 7/16-20 UNF and 1/4-18 NPT female thread on both sides.
Sensor Body 316L stainless steel
Isolating Diaphragm 316L stainless steel/Hastelloy C
Nuts and Bolts 304 stainless steel
Process Connector 304 stainless steel
Fill fluid Silicone oil/Fluorinated oil
Process Connector Gasket Perbunan(NBR)/Viton(FKM)/Teflon(PTFE)
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
EMC Performance Table
Items Test items Basic standards Test conditions Performance Level
1 Radiated interference (Housing) GB/T 9254-2008 30MHz~1000MHz OK
2 Conducted interference(DC power port) GB/T 9254-2008 0.15MHz~30MHz OK
3 Electrostatic Discharge (ESD) Immunity GB/T 17626.2-2006 4kV(Line) 8kV(Air) B
4 RF electromagnetic field immunity GB/T 17626.3-2006 10V/m (80MHz~1GHz) A
5 Frequency magnetic field immunity GB/T 17626.8-2006 30A/m A
6 Electrical Fast Transient Burst Immunity GB/T 17626.4-2008 2kV(5/50ns,5kHz) B
7 Surge Immunity GB/T 17626.5-2008 1kV(line to line) 2kV(line to ground) (1.2us/50us) B
8 Conducted interference immunity induced by RF field GB/T 17626.6-2008 3V (150KHz~80MHz) A
Note:(1)Performance level A description: The technical specifications within the limits of normal performance.
(2)Performance level B description: Temporary reduction or loss of functionality or performance, it can restore itself. The actual operating conditions, storage, and data will not be changed.
Horizontal Impulse Piping Type(side face) Horizontal Impulse Piping Type(front side)
Horizontal Impulse Wall mounting Type Vertical Impulse Piping Type
Note:Quick interface functionally equivalent to the signal terminal
Differential Pressure Transmitter
10 Output
4-20mA with HART
20 Span
  Gauge Pressure
0-100Pa~1kPa(0-10~100 mmH2O)/(0-1~10mbar)
0-200Pa~6kPa(0-20~600 mmH2O)/(0-2~60mbar)
0-400Pa~40kPa(0-40~4000 mmH2O)/(0-20~400mbar)
0-2.5kPa~250kPa(0-0.25~25 mH2O)/(0-25~2500mbar)
0-20kPa~2MPa(0-2~200 mH2O)/(0-0.2~20bar)
30 Diaphragm fill fluid
316L stainless steel Silicone oil
Hastelloy C Silicone oil
40 Working pressure
50 Process connections
7/16-20 UNF and 1/4-18 NPT female thread, No relief valve
7/16-20 UNF and 1/4-18 NPT female thread, Relief valves at end of flanges
7/16-20 UNF and 1/4-18 NPT female thread, Relief valves at the upper part of the flange side
7/16-20 UNF and 1/4-18 NPT female thread, Relief valve at the lower part of the flange side
60 Process connector gasket
Viton (FKM)
Teflon (PTFE)
70 Special function
Square root output
Degrease cleansing treatment(Oxygen measurement must be with fluorinated oil filled capsule, Viton (FKM) gasket, <6MPa ,<60℃)
80 Mounting bracket
304 stainless steel
Carbon steel galvanized
90 Process connector accessory

Stainless steel oval-shaped flange with 1/2 NPT female thread
Stainless steel D-shaped connector with M20x1.5 male thread
100 Integral indicator
LCD display
Backlit LCD display

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