The capacitive intelligent pressure/differential pressure/level transmitter is a high-precision intelligent instrument product independently researched, developed, and manufactured by our company based on many years of scientific research and practical experience.

The intelligent pressure/differential pressure/level transmitter is a new-generation intelligent transmitter manufactured using a sensor core produced with ROSEMOUNT technology, combined with advanced digital technology developed by our company. In principle, it adopts a direct digital capacitance circuit to replace the analog signal amplification circuit and A/D conversion circuit, and uses digital compensation technology to compensate for temperature static pressure, thereby improving measurement accuracy and reducing temperature drift. The transmitter features a compact size, high reliability, and good long-term stability. This product offers an extremely high performance-to-price ratio and has therefore become a mainstream product in the transmitter market.

This intelligent pressure/differential pressure/level transmitter features a novel design principle, a complete variety of types and specifications, easy installation and operation, and safety explosion-proof performance. It is especially renowned for high accuracy, compact size, light weight, convenient adjustment, good long-term stability, strong one-way overload protection capability, and suitability for use in harsh environments. Therefore, it enjoys a very high reputation in domestic and international markets. This series of 0.1-grade capacitive intelligent transmitters includes multiple types such as pressure, differential pressure, absolute pressure, remote transmission, and level, and is equipped with corresponding optional products. It can be widely used in industries such as electric power, metallurgy, petrochemicals, and instrument processing, and complies with the "IEC" standard requirements promoted in China.

Product Features

·Due to the use of a microprocessor, flexibility is increased and functions are enhanced;

·Has strong self-diagnostic capability;

·Wide measuring range coverage 0～0.2kPa…10MPa;

·Accuracy up to 0.1 grade, turndown ratio better than 40：1;

·Zero point and span adjustment do not affect each other;

·Both remote and local span and zero point are adjustable;

·Two-wire system, compliant with HART protocol, capable of digital communication with ROSEMOUNT275 and MS-H376 handheld communicators without interrupting analog output;

·Built-in non-volatile memory in the sensor;

·Good stability, high accuracy, adjustable damping, and strong resistance to one-way overload;

·No mechanical transmission parts, low maintenance workload, sturdy and vibration-resistant;

·All universal parts, sensor and electronic circuit board interchangeability does not affect transmitter performance, making maintenance more convenient;

·Optional diaphragm material for contact media, explosion-proof housing structure;

·Industry-proven superiority and reliability.

Performance Parameters

Technical Performance

Applicable media: liquid, gas, or steam

Measurement range: Range 3  0-0.2～6.0kPa

Range 4  0-6.0～40.0kPa

Range 5  0-40.0～200kPa

Range 6  0-0.16～1.0MPa

Range 7  0-0.4～2.0MPa

Range 8  0-1.6～10MPa

Output signal: linear output: 4~20mA output superimposed with HART protocol digital signal（two-wire system）；

Square root output: between 1.0%~100% input pressure, the output has a square root relationship with differential pressure; between 0%~0.1%, the output has a segmented linear relationship with differential pressure; there is no jump change between 4~20mADC output, superimposed with HART? protocol digital signal(two-wire system), and users may choose linear output or square root output according to on-site conditions.

Power      supply: externally supplied 24V DC, （power supply range 14.5V~45V）

Load characteristics: the maximum allowable load resistance in the load resistor circuit Rmax=(E-10.5)/0.0236(Ω)

Installation in hazardous locations: flameproof Exd Ⅱ CT6；

                intrinsically safe Exia Ⅱ CT6；

Load characteristics: after positive migration, the upper and lower range limits shall not exceed the range limits. At the minimum range, the maximum positive migration is 0.975URL; the maximum negative migration is -URL. For square root output, positive and negative migration can be adjusted to 10% of the flow range.

Temperature range: medium temperature　　　　-40～100℃

  　      storage temperature　　　　-40～100℃

    　    complete unit operating temperature　　-40～85℃

Relative humidity: 0～100%

Overpressure limit: applying 0（absolute pressure）~13.76MPa pressure to either side of the transmitter will not damage the transmitter; the flange can withstand 68.9MPa pressure; normal operating pressure should be between 3.45kPa（absolute pressure） and the upper range limit of the transmitter.

Volume change: less than 0.16cm3

Damping: the time constant is adjustable between 0.2～32.0s.

Startup time: 3s, no preheating required.

Performance indicators:

   （under standard test conditions without migration, with 316 stainless steel isolating diaphragm and other standard test conditions.）

    Range ratio: 40：1

    Accuracy: ranges 3, 4, 5

　　　               when the range ratio is 1：1 to 10：1, it is ±0.1% of the calibrated range,

                      when the range ratio is 10：1 to 40：1, it is ±0.05（1+0.1URL/range）% range,

                ranges 6, 7, 8

                      when the range ratio is 1：1 to 10：1, it is ±0.15% of the calibrated range,

                      when the range ratio is 10：1 to 40：1, it is ±0.075（1+0.1URL/range）% range,

    Stability: the six-month error is ±0.15% of the maximum range；

    Temperature effect: for ranges 4, 5, 6, 7, 8

                   zero point error is ±0.25%/55℃ of the maximum range.

　　　　　     the total error including range and zero point is ±0.5%/55℃ of the maximum range.

　　　　Note: for range 3, the temperature error should be doubled.

    Overpressure effect: after applying pressure of 140kgf/cm2, the error is ±0.25% of the maximum range span.

    Static pressure effect: for linear output, zero point error: after applying static pressure of 140kgf/cm2, the zero point error for ranges 4 and 5 is ±0.25% of the maximum range span, and the zero point error for ranges 3, 6, 7, and 8 is ±0.5% of the maximum range span.

　 Range error: for ranges 4, 5, 6, 7, and 8, the error is -1±0.25%/6.89MPa of the maximum range span, and for range 3, the error is -1.5±0.25%. This is a system error and can be eliminated by calibration according to the actual static pressure before installation.

    Power supply effect: less than 0.005%/V of output span

    Vibration effect: on any axis, at a frequency of 200Hz, the resulting error is ±0.05%/g of the maximum range span.

    Load effect: as long as the voltage input to the transmitter is higher than 14.5V, there is no load effect within the load operating range.

    Installation position effect: a zero shift error of no more than 0.25 kPa may be generated, but it can be corrected and has no effect on the span;

Rotation of the measuring body relative to the flange has no effect.

    Electromagnetic radiation: complies with IEC801 standard

Outline Structure

 Structural materials:

        Isolating diaphragm and vent/drain valve: 316 stainless steel, Hastelloy C, Monel;

　　  Flange and connector: 316 stainless steel, Hastelloy C, Monel;

        “O” ring（in contact with measuring medium）: fluororubber, nitrile rubber, ethylene-propylene;

　　  Fill fluid: silicone oil;

　　  Bolt: carbon steel zinc plated, 1Cr18Ni9, 0Cr17Ni4CuNb, 42CrMo;

        Electrical housing: low-copper aluminum alloy;

        Coating: polyester epoxy resin;

        Pressure connection fitting: for ranges 3, 4, and 5, two-flange connection thread 1/4-18NPT with center hole spacing of 54mm;

　　　　　　　　  Connector 1/2-14NPT or M20X1.5 male thread; with ball cone seal and connector, center spacing is 50.8, 54, 57.2mm;

        Weight:  3.5kg（excluding options）

Since its establishment, Xi'an Shenghongchuang Instrument Co., Ltd. has mainly engaged in the R&D and production of pressure, level, temperature, differential pressure, digital display, weighing, and flow instruments. Its main products include Swiss metallux ceramic piezoresistive sensors and self-developed ceramic capacitive pressure sensors. Diffused silicon, ceramic piezoresistive, strain gauge, metal capacitive, ceramic capacitive pressure transmitters, remote pressure transmitters, high-temperature pressure transmitters, flush diaphragm pressure transmitters, anti-corrosion pressure transmitters, integrated/split level transmitters, anti-corrosion level transmitters, lightning-protected level transmitters, high-temperature guided pressure level transmitters, rigid rod level transmitters, flange level transmitters, air pressure transmitters, metal capacitive differential pressure transmitters, diffused silicon differential pressure transmitters, pressure controllers, thermocouple/RTD temperature transmitters, ultrasonic level meters

Notes 1.All supplied products are accompanied by product certificates and instruction manuals, including product number, technical parameters, wiring, factory date, etc. Please carefully check them to avoid misuse.2.Wiring should be carried out strictly in accordance with our company's instructions for use.3.This product is a precision instrument. Random disassembly, collision, dropping, or probing the sensor with sharp tools is prohibited.4.The transmitter can work immediately after power-on, but the output will stabilize after preheating for 30 minutes.5.If any abnormality is found during use, the power supply should be turned off, use should be stopped, and inspection should be carried out, or directly contact our company's technical department.6.During transportation and storage, restore the original packaging and store it in a cool, dry, ventilated warehouse.7.The quality guarantee period is 12 months（damage caused by improper use such as pressure overload or incorrect wiring is not covered by the quality guarantee）.8.Special products are customized products and do not participate in 7-day no-reason return service. Customized products have a delivery period and are non-returnable and non-exchangeable.