SMT3151TGP/TAP Direct Mount Pressure / Absolute Pressure Transmitter (T Type)

Description

Pressure (gauge)/absolute pressure transmitter is a pressure signal measured at the reference end of atmospheric pressure (or vacuum) with only one port connected to the process pipe.

Its working principle is that when the silicon monocrystalline material is subjected to the action of external force to produce extremely small strain, the electronic energy level state of its internal atomic structure will change, resulting in the drastic change of its resistivity. This physical effect is called piezoresistive effect. Based on piezoresistive effect principle, an integrated process technology is adopted to make strain resistance along the characteristic crystal direction of monocrystalline silicon wafer after doping and diffusion, forming the Wheatstone bridge, and then a diffused silicon sensor integrating force sensitivity and force-electricity conversion detection is made.

When the pressure directly or indirectly ACTS on the surface of the silicon wafer and causes the diaphragm to produce tiny deformation, the high-precision circuit measuring the deformation of the silicon wafer transforms the tiny deformation into a voltage signal proportional to the pressure. After temperature and pressure compensation, this voltage signal is converted into industrial standard 4-20ma current signal or 1-5v voltage signal using a dedicated chip.

Since the measuring diaphragm detecting circuit uses an integrated circuit and contains a linear and temperature compensating circuit internally, high precision and high stability can be achieved, and it is convenient for use in various complicated industrial environments.

Technical Performance

Use object: liquid, gas or steam

Measuring range: see the selection specification table

Output signal: 4-20mA dc. Output, superimposed HART protocol digital signal (two-wire system)

Power source: external power supply 24V dc. Power supply range 12V ~ 45V

Load characteristics:

Installation in dangerous places:

Flameproof  ExdIIBT5Gb;(explosion-proof certificate no. :CE16.1163)

Intrinsically safe ExiaIICT4/T5/T6Ga;（explosion-proof certificate no. : CE15.2354X） ;

Migration features:

At the minimum range (the range compression ratio is 40:1), the maximum positive transfer zero point is 39/40 times the upper limit of the range, the maximum negative transfer zero point can be the lower limit of the range, the absolute pressure transmitter has no negative transfer.(regardless of the output form, the upper and lower limits of the range shall not exceed the limit of the range after positive and negative migration)

Temperature range:

Electronic circuit board work in: - 40 ~ 85 ℃;

Sensitive components work in :- 40 ~ 85 ℃;

Storage temperature :- 40 ~ 85 ℃;

With digital display: - 25 ~ 75 ℃ (run);

- 40 ~ 85 ℃ (no damage);

Relative humidity: 0 ~ 95%

Overpressure limit: 2~5 times the maximum range of pressure transmitter is not damaged.

Volume change: less than 0.16cm3

Damping: the time constant is adjustable from 0.1 to 32.0s.

Startup time: 3s, no preheating required.

Technical Index

 (Unmigration, 316 stainless steel isolation diaphragm and other standard test conditions.)

Accuracy: ±0.1%, ±0.075%

Stability: ±0.2%/12 months of the maximum range

Temperature effect：including zero and range for maximum temperature error of ±0.2% / 20 ℃

Power supply impact: less than 0.005% / V of the output range.

Vibration effect: in any axial direction, the frequency is 200Hz, and the error is ±0.05% / g of the maximum range.

Load effect: as long as the input transmitter voltage is higher than 12V, there is no load effect in the load working area.

Influence of installation location: zero error of no more than 0.10kpa can be generated at the maximum, which can be eliminated by correction without any impact on the range; The measuring body has no influence on relative flange rotation.

Application and type selection：

Common pressure transmitter is the most commonly used test instrument in industrial process control. It is widely used in various automatic control systems, such as aerospace, military, petrochemical, chemical, oil Wells, electric power, ships, building materials, pipelines and many other industries. Generally used in liquid, gas or steam pressure or absolute pressure measurement, medium temperature is not too high, corrosion is not strong, viscosity is not high, not easy to crystallize and other environments

Attention to type selection:

       Before selecting the type, the user shall make clear the temperature, corrosion, measuring range, whether the measured medium is explosion-proof, whether the oil shall be forbidden, whether the medium is easy to crystallize or viscous, and whether the diaphragm flange connection is needed.

SM3151TGP/TAP Direct Mount Pressure / Absolute Pressure Transmitter Interface Thread Specifications

Common form pressure interface

Flush membrane pressure connection interface

SM3151TGP/TAP Pressure/absolute pressure transmitter selection specifications table

Selection example：3151TGP4SF22AL2M4X1    0～1000kPa

Huaheng Instrument mainly engaged in five categories products. Pressure parts : pressure transmitter, pressure gauge. Temperature parts: temperature transmitter, temperature gauge. Flow parts: Mass Flowmeter Vortex Flowmeter and Electromagnetic Flowmeter.These products are widely used in electricity, water, food & beverage, petroleum, petrochemical, coal, chemical, metallurgy industries.

Our advantages:

Free patented technology

Professional r&d and production

Professional production equipment

High cost performance

Our company has a high-level professional technical team, including experienced technical development, process design and quality management personnel.Mr. Tian gaolin, you should know.He is the former factory director of Xi'an Instrument. He has received the technical training of rosemount in the United States for many times, which is quite a well-known task in the domestic industry. Now he is still making contributions to our front-line research and development.Mr Tian has been focusing on the research of our pressure/differential pressure transmitter for more than 40 years, which is also the main product of our company.There are also Zhou Weidong ,who used to be mainly responsible for the production of circuit boards in Xi'an Instrument.So our technical force in the domestic industry, are top.At the same time, in order to develop more stable technology, our company invested 10 million yuan, from the beginning of the diaphragm, circuit board, to the whole machine is our own research and development, now our SMAR series products are also national patents.In terms of the product, all the products are independently developed and produced by us.Of course, we also have our own OEM products, including: capacitive pressure/differential pressure transmitter, diffused silicon pressure transmitter, flanged pressure/level transmitter, input level transmitter, magnetostrictive level meter, on-line densitometer, and intelligent HART manipulator.These products have not been produced for one or two days, but have been sold in the market for many years. Our customers have used them for many years, and their feedback is very good.Our current annual output is about 20,000 units with an output value of about 20 million yuan.

Welcome to inquire!