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 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 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 temperature and static pressure, thereby improving measurement accuracy and reducing temperature drift. The transmitter features compact size, high reliability, and good long-term stability. With an extremely high 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, easy installation and use, and safety explosion-proof performance. It is especially well known for high accuracy, compact size, light weight, convenient adjustment, good long-term stability, strong unilateral 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 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 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 measuring range coverage 0～0.2kPa…10MPa;

·Accuracy up to Class 0.1, rangeability better than 40：1;

·Zero point and span adjustments 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 analog output;

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

·Good stability, high accuracy, adjustable damping, and strong resistance to unilateral overload;

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

·All parts are universal, 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

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 in output between 4~20mADC, superimposed with HART? protocol digital signal(two-wire system), and users can choose linear output or square root output according to field conditions.

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

Load characteristics: Maximum allowable load resistance in the load resistor circuit 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 limits of the range shall not exceed the range limits. At the minimum range, the maximum positive shift is 0.975URL; the maximum negative shift is -URL. In square root output mode, positive and negative shift can calibrate 10% of the flow range.

Temperature range: Medium temperature　　-40～100℃

  　      Storage temperature　　-40～100℃

    　    Operating temperature of the whole unit　　-40～85℃

Relative humidity: 0～100%

Overpressure limit: Apply 0（absolute pressure）~13.76MPa pressure to either side of the transmitter without damaging the transmitter; the flange can withstand 68.9MPa pressure; normal operating pressure should be from 3.45kPa（absolute pressure）to the upper limit of the transmitter range.

Volume change: less than 0.16cm3

Damping: time constant adjustable between 0.2～32.0s.

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

Performance Indexes:

    （Under standard test conditions with no shift, 316 stainless steel isolation diaphragm, and other standard test conditions.）

    Rangeability: 40：1

    Accuracy: 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/range）% span,

                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/range）% span,

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

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

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

　　　　　    The total error including span and zero point 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: during 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, and 8 is ±0.5% of the maximum span range.

　 Range error: for Ranges 4, 5, 6, 7, and 8, the error is -1±0.25%/6.89MPa of the maximum span range, 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 induced error is ±0.05%/g of the maximum span range.

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

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

The 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 galvanized, 1Cr18Ni9, 0Cr17Ni4CuNb, 42CrMo;

        Electrical housing: low-copper aluminum alloy;

        Coating: epoxy resin;

        Pressure connection: for Ranges 3, 4, and 5, the thread of the two-flange connection 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, 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. 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, integral/split level transmitters, anti-corrosion level transmitters, lightning protection level transmitters, high-temperature guided pressure level transmitters, straight 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 provided with product certificates and instructions, 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. Arbitrary disassembly, collision, dropping, and poking the sensor with sharp tools are prohibited.4.The transmitter can work immediately after power-on, but the output will be stable after 30 minutes of preheating.5.If any abnormality is found during use, the power supply should be turned off, use should be stopped, inspection should be carried out, or our company's technical department should be contacted directly.6.During transportation and storage, the original packaging should be restored and stored in a cool, dry, and ventilated warehouse.7.The quality guarantee period is 12 months（damage caused by improper use such as pressure overload or wiring errors 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 delivery lead time and are non-returnable and non-exchangeable.