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 by adopting a sensor core manufactured 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 compact size, high reliability, and excellent long-term stability. With extremely high cost performance, 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 safety explosion-proof performance. It is especially well known for high accuracy, compact size, light weight, easy 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 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 electric power, metallurgy, petrochemical, instrumentation processing, and other industries, 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 0.1 grade, with range ratio better than 40：1;

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

·Both remote and local adjustment of range 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 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 parts in contact with the medium, explosion-proof housing structure;

·Proven superior performance and reliability in the industry.

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: when the input pressure is between 1.0%~100%, 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 the output between 4~20mADC, 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: 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 limits of the range shall not exceed the range limits. 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℃

    　    operating temperature of the complete unit　　-40～85℃

Relative humidity: 0～100%

Overpressure limit: applying pressure of 0（absolute pressure）~13.76MPa 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: 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 migration, 316 stainless steel isolation diaphragm, and others.）

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

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

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

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

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

    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: may generate 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: 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 measuring medium）: fluororubber, nitrile rubber, ethylene-propylene;

　　  Filling liquid: silicone oil;

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

        Electrical housing: low-copper aluminum alloy;

        Coating: polyester epoxy resin;

        Pressure connection fitting: for ranges 3, 4, and 5, the center hole distance of the threaded connection of the two flanges is 54mm;

　　　　　　　  Connector 1/2-14NPT or M20X1.5 male thread; when provided with a ball-cone sealing 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. 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, rigid 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 meters

Notes 1.All supplied products are provided with 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. Random disassembly, collision, dropping, or poking the sensor with sharp tools is prohibited.4.The transmitter can work immediately after power-on, but the output will be 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 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 and do not participate in the 7-day no-reason return policy. Customized products have a lead time and are non-returnable and non-exchangeable.