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 produced using a sensor core manufactured 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 extremely high cost-performance 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 renowned 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 high reputation in domestic and international markets. This 0.1-grade capacitive intelligent transmitter series includes pressure, differential pressure, absolute pressure, remote transmission, level, and other varieties, and is equipped with corresponding optional products. It can be widely used in electric power, metallurgy, petrochemical, instrument processing, and other industries, 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 rangeability better than 40：1;

·Zero point and span adjustments 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;

·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 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 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: within 1.0%~100% input pressure, the output has a square root relationship with differential pressure; within 0%~0.1%, the output has a segmented linear relationship with differential pressure; there is no jump in the 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 24V DC power supply, （power supply range14.5V~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. For square root output, positive and negative shift can 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; 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: adjustable time constant 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 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/span）% 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/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% of the maximum span/55℃.

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

    Static pressure effect: for linear output, zero error: after applying static pressure of 140kgf/cm2, the zero error for ranges 4、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 the 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 zone.

    Installation position effect: may produce a zero position error of 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 and 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、5, thread of two-flange connection is 1/4-18NPT with center hole spacing of 54mm;

　　　　　　　Connector 1/2-14NPT or M20X1.5 male thread; with ball-cone sealing and connector, center distance is 50.8、54、57.2mm;

        Weight:   3.5kg（excluding options）

Since its establishment, Xi'an Shenghongchuang Instrument Co., Ltd. has been 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 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 protection 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, thermocouples/RTDs, temperature transmitters, ultrasonic level meters

Precautions 1.All supplied products are provided with product certificates and instructions, 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 probing 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 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, customization has a delivery period, no return and no exchange.