The capacitive intelligent pressure/differential pressure/level transmitter is a high-precision intelligent instrument product independently developed by our company on the basis of 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 the 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 complete transmitter features small size, high reliability, and good long-term stability. This product offers an excellent 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, complete varieties and specifications, convenient installation and use, 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 class 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, petrochemical, and instrument processing, and complies with the "IEC" standard requirements promoted in China.

Product Features

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

·Strong self-diagnostic capability;

·Wide range coverage 0～0.2kPa…10MPa;

·Accuracy up to 0.1 class, with range ratio better than 40：1;

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

·Supports both remote and local adjustment of range and zero point;

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

·Optional diaphragm materials for contact with the medium, 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 within 4~20mADC output, superimposed with HART? protocol digital signal(two-wire system), and users may 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 characteristics: the maximum load resistance allowed in the load resistor loop is Rmax=(E-10.5)/0.0236(Ω)

Installation in hazardous locations: flameproof type Exd Ⅱ CT6;

                intrinsically safe type Exia Ⅱ CT6;

Load characteristics: after positive and negative shift, the upper and lower range limits must not exceed the range limits. At the minimum range, the maximum positive shift is 0.975URL; the maximum negative shift is -URL. During square root output, positive and negative shift 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: apply 0（absolute pressure）~13.76MPa pressure to either side of the transmitter, and the transmitter will not be damaged; 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 with no shift, 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.

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

　 Range error: for ranges 4、5、6、7、8, the error is -1±0.25%/6.89MPa of the maximum range span; 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 range

    Vibration effect: on any axis, at a frequency of 200Hz, the induced 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 area.

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

The rotation of the measuring body relative to the flange has no effect.

    Electromagnetic radiation: compliant 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 the measured medium）: fluororubber, nitrile rubber, ethylene-propylene;

　　  Filling liquid: silicone oil;

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

        Electrical housing: low-copper aluminum alloy;

        Coating: polyurethane epoxy resin;

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

　　　　　　　　  Connector 1/2-14NPT or M20X1.5 male thread; when using ball cone sealing with 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 been 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, and ultrasonic level meters

Notes 1.All supplied products are accompanied by a product certificate and instruction manual, including product number, technical parameters, wiring, factory date, 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; arbitrary disassembly, collision, dropping, or poking the sensor with sharp tools is prohibited.4.The transmitter can work immediately after being powered on, but the output will stabilize after preheating for 30 minutes.5.If any abnormality is found during use, turn off the power supply, 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 7-day no-reason return, customized products have a lead time, and are not returnable or exchangeable.