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 for temperature and static pressure, thereby improving measurement accuracy and reducing temperature drift. The transmitter features a compact size, high reliability, and excellent 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, complete varieties and specifications, convenient installation and use, and safe explosion-proof performance. It is especially well known for its high accuracy, compact size, light weight, convenient adjustment, excellent 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 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 standards 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 0.1 class, turndown ratio better than 40：1;

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

·Both remote and local range and zero adjustment 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 one-way overload;

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

·All universal parts, interchangeability of the sensor and electronic circuit board does not affect transmitter performance, making maintenance more convenient;

·Optional diaphragm materials for contact media, explosion-proof housing structure;

·Superior performance and reliability proven by the industry.

Performance Parameters

Technical Performance

Applicable media: liquid, gas, or vapor

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 is in a square root relationship with differential pressure; between 0%~0.1%, the output is in 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 on-site conditions.

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

Load characteristics: maximum allowable load resistance in the load resistance loop 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 limits of the range shall not exceed the limits of the measuring range. 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; 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.

Startup time: 3s, no preheating required.

Performance indicators:

   （Under standard test conditions with no migration, 316 stainless steel isolation diaphragm, and other standard 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 calibrated span,

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

                ranges 6、7、8

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

                      when the range ratio 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 point error is ±0.25%/55℃ of the maximum span.

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

　 Span error: for ranges 4、5、6、7、8, the error is -1±0.25%/6.89MPa of the maximum span range; for range 3, the error is -1.5±0.25%. This is a system error and can be eliminated by calibrating according to 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 of no more than 0.25 kPa may be generated at most, but it can be corrected and has no effect on span;

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 joint: 316 stainless steel, Hastelloy C, Monel;

        “O” ring（in contact with the 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, the center hole distance of the two-flange connection thread 1/4-18NPT is 54mm;

　　　　　　　　  Joint 1/2-14NPT or M20X1.5 male thread; with spherical cone sealing and joint, 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-protection 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.

Precautions 1.All supplied products are provided with a product certificate and instruction manual, including product number, technical parameters, wiring, ex-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, and poking the sensor with sharp tools are 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, the power supply should be turned off, use should be stopped, and inspection should be carried out, 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 warranty period is 12 months（damage caused by improper use such as pressure overload and incorrect wiring is not covered by the quality warranty）.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.