The capacitive intelligent pressure/differential pressure/level transmitter is a high-precision intelligent instrument product independently researched, developed, and manufactured 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 of intelligent transmitter manufactured by adopting a sensor core produced with ROSEMOUNT technology and integrating the advanced digital technology developed by our company. In principle, it adopts a direct digital capacitive circuit to replace the analog signal amplification circuit and A/D conversion circuit, and uses digital compensation technology to compensate 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 extremely high cost-performance 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 range of types and specifications, convenient installation and use, and safety explosion-proof performance. It is especially well known for high accuracy, small 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 pressure, differential pressure, absolute pressure, remote transmission, level, and many 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 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 0.1 grade, with a rangeability better than 40：1;

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

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

·Two-wire system, compliant with the HART protocol, enabling 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, less maintenance work, robust 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 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: 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 select linear output or square root output according to on-site conditions.

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

Load characteristics: the maximum allowable load resistance in the load resistor circuit 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 migration, the upper and lower span limits shall not exceed the span limits. At the minimum span, the maximum positive migration is 0.975URL; the maximum negative migration is -URL. Under square root output, positive and negative migration can be adjusted to 10% of the flow span.

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 span.

Volume change: less than 0.16cm3

Damping: time constant adjustable between 0.2～32.0s.

Startup time: 3s, no preheating required.

Performance indexes:

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

    Rangeability: 40：1

    Accuracy: for ranges 3, 4, 5

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

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

                for ranges 6, 7, 8

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

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

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

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

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

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

　　　　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 span range.

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

　 Span error: the error for ranges 4, 5, 6, 7, 8 is -1±0.25%/6.89MPa of the maximum span range, and the error for range 3 is -1.5±0.25%. 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 span

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

    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:

        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;

　　  Fill fluid: silicone oil;

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

        Electrical housing: low-copper aluminum alloy;

        Coating: polyurethane epoxy resin;

        Pressure connection fittings: for ranges 3, 4, 5, the connection thread of the two flanges is 1/4-18NPT and the center hole distance 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, 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-proof level transmitters, high-temperature guided pressure level transmitters, straight 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 gauges

Notes 1.All supplied products are provided with a product certificate and instruction manual, including product number, technical parameters, wiring, factory date, etc. Please carefully check them to avoid incorrect use.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 touching 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, turn off the power supply, stop using it, inspect it, 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, do not participate in 7-day no-reason return, customized products have a delivery period, and are non-returnable and non-exchangeable.