NCS Series of Intelligent Transmitter have been designed with high precision and high reliability, high stability. The pressure, temperature, currents and other physical quantities are displayed on LCD module. Zero drift, range settings and many other functions, are realized by the magnetism bar operation. The interoperability between different systems and equipments are realized by the Equipment Description Document, which is coMpatible to a variety of device management software, and adapting to harsh electromagnetic environment. NCS Series of Intelligent Transmitter have been used in inflammable and explosive places according to Intrinsically Safety Design.
According to the type of measurable pressure:
Gauge Pressure Transmitter
Absolute Pressure Transmitter
Differential Pressure Transmitter
Differential Pressure Transmitter For High Static Pressure
-- High precision: ±0.075% full range (20℃, within the range of 10:1)
-- Long-term stability: ±0.1% of the maximum range within 12 months
-- Pressure type selection (micro differential pressure, surface pressure, absolute pressure, differential pressure, high static differential pressure)
-- Parameters can be set by magnetic bar, hand operator and upper computer software
-- High range ratio (100:1)
-- Self-detection function (sensor, memory, communication)
-- Automatic compensation function (ambient temperature compensation, sensor input linearization)
-- Software and hardware fault alarm function
-- Configuration protection: EEPROM write protection function
Introduction for Working Principle
The widely used 3151 capacitive pressure sensors, which were developed by Rosemount initially in USA, have been produced on a large scale in China. The core of its sensor is differential capacitive membrane, as Figure 3-2 shows. There are two measurement capacitances CH and CL distributed in differential capacitive membrane. The two measurement capacitances are almost equal to two plate capacitances because of their mechanical structure. The two measurement capacitances share one polar plate, which is a measure membrane in the center. And the other polar plate is fixed on the two sides. When the pressures of two sides are equal, the measure membrane is in the center, the capacitances of two sides are equal too. But when the pressure of high pressure side is higher than that of low pressure side, the guide pressure liquid filled in the membrane guides the differential pressure, so that the measure membrane moves to low pressure side. As a result, the capacitance of high pressure side is lower than that of the low pressure side.
Sensor Capacitance Membrane
11.9~42 V DC (HART)
11.9~30 V DC (Hart Explosion-Proof Instrument)
Analog: 2 Wire 4~20ma
Digital: HART, FF AND PA Signal
250~550ohm (With Hart)
Input And Output Insulating Voltage: 500vrms (707vdc)
Optional 6 Bits Digital Number Or 5 Bits Characters LCD Display
Work Temperature: -40 ~ 85℃ (No Display)
-30 ~ 70℃(Display)
-30 ~ 60℃ (Explosion-Proof)
Store Temperature: -40 ~ 100℃ (No Display)
-40 ~ 85℃ (Display)
Allowed Media Temperature Measured
-40 ℃~ 110 ℃ (Type Name Include ‘IC‘)
-40 ℃~ 149 ℃ (Silicone Oil)
-40 ℃~ 204 ℃ (Sylthlem800)
-18 ℃~ 204 ℃ (Inert Liquid)
-40 ℃~ 104 ℃ (Others)
≤ 5 Seconds
Time Constant 0~15 Seconds
Change Of Cavity
< 0.16 Cm3
Smart Transmitters Size shown as:
Smart Transmitter Size(Unit:mm)
The power and signal of Smart Transmitter are sharing one pair of cables (Bus Cable). The ordinary cables can be selected by HART smart transmitter, but FF, PA Smart Transmitter is suggested to use specific Fieldbus cable the IEC61158-2 recommended. The terminal is at the rear cover, the terminal wiring board could be seen after screwing the rear cover (indicated “FIELD TERMINAL”).
HART Smart Transmitter wiring
Q: Which one is the most popular model?
A: NCS-PT105ⅡSG and NCS-PT105ⅡSD.
Q: How to install NCS-PT105II Pressure Transmitter (Capacitance Sensor) ?
A: There are three ways to install NCS-PT105II Pressure Transmitter (Capacitance Sensor): installation of pipe mounting flat bracket, installation of pipe mounting angle bracket and installation of plat mounting angle bracket.
Q: Can I get a free electronic manual?
A: Yes, if you want it, please contact us.
Q: Can you provided OEM service?
A: Yes, we can, such as communication board, we can also provided fieldbus development toolkit.