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 and combined with the advanced digital technology developed by our company. In principle, it uses a direct digital capacitance circuit to replace the analog signal amplification circuit and A/D conversion circuit, and applies digital compensation technology to compensate for temperature and static pressure, thereby improving measurement accuracy and reducing temperature drift. The complete transmitter features small 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 concept, a complete range of models and specifications, easy installation and operation, and safety explosion-proof performance. It is especially well known 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 high reputation in both domestic and international markets. This series of 0.1-grade capacitive intelligent transmitters includes pressure, differential pressure, absolute pressure, remote transmission, level, and other types, and is equipped with corresponding optional products. It can be widely used in industries such as electric power, metallurgy, petrochemical, 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, with a turndown ratio better than 40：1;

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

·Both remote and local span and zero adjustment are available;

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

·The sensor has built-in non-volatile memory;

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

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

·All parts are interchangeable, and interchanging the sensor and electronic circuit board does not affect transmitter performance, making maintenance more convenient;

·Optional diaphragm materials for contact parts, 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 step change between 4~20mADC output, superimposed with HART? protocol digital signal(two-wire system), and users can select linear output or square root output according to site conditions.

Power      supply: external power supply 24V DC，（power supply range14.5V~45V）

Load characteristic: the maximum load resistance permitted in the load resistance loop Rmax=(E-10.5)/0.0236(Ω)

Installation in hazardous locations: flameproof type Exd Ⅱ CT6；

                intrinsically safe type Exia Ⅱ CT6；

Load characteristic: after positive and negative migration, the upper and lower limits of the range shall not exceed the limits of the range. At the minimum range, the maximum positive migration is 0.975URL; the maximum negative migration is -URL. During square root output, positive and negative migration can be adjusted and calibrated 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 within 3.45kPa（absolute pressure）to the upper limit of the transmitter range.

Volume change: less than 0.16cm3

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

Start-up time: 3s, no preheating required.

Performance indicators:

   （Under standard test conditions without migration, with 316 stainless steel isolation 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: six-month error is ±0.15% of the maximum range;

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

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

　　　　　     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.

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

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

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

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

    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 region.

    Installation position effect: a zero position error not greater than 0.25 kPa may be generated at maximum, but it can be corrected and has no effect on the range;

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

    Electromagnetic radiation: complies with IEC801 standard

Appearance Structure

 Structural materials:

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

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

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

　　  Filling fluid: silicone oil;

　　  Bolts: carbon steel galvanized, 1Cr18Ni9, 0Cr17Ni4CuNb, 42CrMo;

        Electrical housing: low-copper aluminum alloy;

        Coating: epoxy resin;

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

　　　　　　   joint 1/2-14NPT or M20X1.5 male thread; when using ball cone sealing with joint, the center spacing is 50.8, 54, 57.2mm;

        Weight:   3.5kg（excluding options）

Since its establishment, Xi'an Shenghong Chuang Instrument Co., Ltd. has mainly engaged in the R&D and production of pressure, level, temperature, differential pressure, digital display, weighing, and flow instruments. Main products include Swiss metallux ceramic piezoresistive sensors, 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, integral/split level transmitters, anti-corrosion level transmitters, lightning protection level transmitters, high-temperature guided pressure level transmitters, rod type level transmitters, flange level transmitters, air pressure transmitters, metal capacitive differential pressure transmitters, diffused silicon differential pressure transmitters, pressure controllers, thermocouples/RTDs, temperature transmitters, and ultrasonic level meters

Notes 1. All supplied products are provided with a product certificate and instruction manual, including product number, technical parameters, wiring, date of manufacture, etc. Please check carefully 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 poking the sensor with sharp tools is prohibited. 4. The transmitter can work immediately after power-on, but the output becomes stable 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 contact our company's technical department directly. 6. During transportation and storage, restore the original packaging and store it in a cool, dry, and ventilated warehouse. 7. The quality guarantee period is 12 months（damage caused by improper use such as pressure overload and incorrect wiring is not covered by the quality guarantee）. 8. Special products are customized products and do not participate in the 7-day no-reason return policy. Customized products have a lead time and are not returnable or exchangeable.