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 and static pressure, thereby improving measurement accuracy and reducing temperature drift. The complete transmitter features small size, high reliability, and good long-term stability. With an excellent performance-to-price ratio, this product has become a mainstream product in the transmitter market.

This intelligent pressure/differential pressure/level transmitter features a novel design principle, a complete range of models and specifications, convenient installation and use, and safety explosion-proof performance. It is especially well known for high accuracy, compact size, light weight, easy 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 Class 0.1 capacitive intelligent transmitters includes pressure, differential pressure, absolute pressure, remote transmission, level, and many other types, and is equipped with corresponding optional accessories. It can be widely used in electric power, metallurgy, petrochemical, instrument processing, and other industries, and complies with the "IEC" standards implemented in China.

Product Features

·The use of a microprocessor provides greater flexibility and enhanced functions;

·Strong self-diagnostic capability;

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

·Accuracy up to Class 0.1, with a turndown ratio better than 40:1;

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

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

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

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

·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, and interchangeability between the sensor and electronic circuit board does not affect transmitter performance, making maintenance more convenient;

·Optional diaphragm materials for parts in contact with the measured medium, explosion-proof housing structure;

·Industry-proven superiority and reliability.

Performance Parameters

Technical Performance

Applicable media: liquid, gas, or steam

Measuring 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: when the input pressure is between 1.0%~100%, 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 sudden change within 4~20mADC output, superimposed with HART? protocol digital signal(two-wire system), and users can select linear output or square root output according to on-site conditions.

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

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

Installation in hazardous areas: flameproof type Exd Ⅱ CT6；

                intrinsically safe type Exia Ⅱ CT6；

Load characteristic: after positive or negative 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. During square root output, positive and negative migration can be adjusted to calibrate 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; the normal operating pressure should be between 3.45kPa（absolute pressure）and 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 with no migration, 316 stainless steel isolation diaphragm, and other standard conditions.）

    Turndown ratio: 40:1

    Accuracy: Ranges 3, 4, 5

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

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

                Ranges 6, 7, 8

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

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

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

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

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

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

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

　 Span 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 the 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 region.

    Installation position effect: the maximum zero shift error generated is no more than 0.25 kPa, 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

Appearance Structure

 Structural materials:

        Isolation 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 measured 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: polyurethane epoxy resin;

        Pressure connection fitting: for Ranges 3, 4, and 5, the center distance of the threaded holes of the two-flange connection is 54mm for 1/4-18NPT;

　　　　　　　  Connector 1/2-14NPT or M20X1.5 male thread; when equipped with a ball cone sealing connector, the center distance 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, 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-protection level transmitters, high-temperature guided pressure level transmitters, rigid rod level transmitters, flange level transmitters, wind pressure transmitters, metal capacitive differential pressure transmitters, diffused silicon differential pressure transmitters, pressure controllers, thermocouple/RTD temperature transmitters, and ultrasonic level meters.

Notes 1. All supplied products are provided with product certificates and instruction manuals, including product number, technical parameters, wiring, factory date, etc. Please carefully check them to avoid incorrect use. 2. Wiring shall 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 30 minutes of preheating. 5. If any abnormality is found during use, turn off the power, stop using it, inspect it, or directly contact our company’s technical department. 6. During transportation and storage, restore the original packaging and store it in a cool, dry, and ventilated warehouse. 7. The quality warranty period is 12 months（damage caused by improper use such as pressure overload or incorrect wiring is not covered by the quality warranty）. 8. Special products are customized products, do not participate in the 7-day no-reason return policy, have a customization lead time, and are non-returnable and non-exchangeable.