What applications do flow meters usually used?

1. Energy metering

Energy is divided into primary energy (coal, crude oil, coalbed methane, LPG and natural gas), secondary energy (electric power, coke, artificial gas, refined oil, liquefied petroleum gas, steam) and carrying energy (compressed air, oxygen, nitrogen, hydrogen, water). Energy metering is an important means to manage energy scientifically, achieve energy saving and improve economic efficiency. The flow meter is an important part of energy metering instruments. Very large quantities of flow meters are used in common energy such as water, artificial gas, natural gas, steam, and oil. They are an indispensable tool for energy management and economic accounting.

2. The process of industrial production 

Flow Meter is one of the large-class instruments in the process automation instrument and device, which is widely used in various areas of the national economy like metallurgy, electric power, coal, chemical industry, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection and people's daily life. It is an important tool which occupies a vital position in developing industrial and agricultural production, saving energy, improving product quality, improving economic efficiency and management level. In the instrumentation and device of process automation, the flow meter has two main functions, as the process automation control system's measuring instrument and the total table for the quantity of measured materials.

3. Biological technologies

The 21st century will usher in the Century of Life Science. A lot of substances, such as blood, urine and so on need to be monitored and measured by biological technology. The instrument is very difficult to develop with a wide variety.

4. Transportation

There are five ways: railway, air, water, and piping. The characteristics of pipeline transportation have aroused people's attention with the prominence of environmental protection issues. The pipeline transportation must equip with the flow meter, which is the control, the distribution and the dispatch eye as well as the essential tool for safety supervision and the Economic accounting.

5. Scientific experiments

Scientific experiments require not only a large number of flow meters but also an extremely complex variety. According to the statistical, among more than 100 kinds of flow meters, a large part of them are used for scientific research. They do not a mass production or in the market. Many scientific research institutions and large enterprises set up special groups to develop dedicated flow meter.

 

6. Environmental protection projects

The emission of flue gas, waste water, sewage and so on seriously pollute the atmosphere and aquatic resources as well as threaten the environment of human existence seriously. Sustainable development has been made as a national policy by the State and environmental protection will be the biggest issue in the 21st century. We should control and strengthened management of the pollution of air and water, and the basis of management is the quantitative control of pollution.

SILVER AUTOMATION INSTRUMENTS industrial process instrumentations solve varies demanding in Agricultural Irrigation, Industrial Water & Wastewater, Factory Process Control, Oil & Gas, Electric Power Generation.etc, our products can be found in huge installations worldwide and domestic. The reliable and robust measurement instrumentations meet many demanding industrial, safety and quality criteria in domestic and foreign courtiers.

The main categories of our products are:

• Flow Measurements

(Electromagnetic flow meter, vortex flow meter, turbine flow meter, oval gear flow meter.etc)

• Temperature Measurements

(Thermocouple and RTD, Temperature transmitters, thermometer)

• Pressure Measurements

(Pressure Gauge, pressure transmitter) 

• Level Measurements

(Ultrasonic level meter, Hydrostatic level meter, Radar level meter)

• Panel Meters & Paperless Recorders

(Flow totalizer, Batch controllers, and paperless recorders)

We constant pursuit qualified products combining with our knowledge of instrumentations to serve our customers

Our slogan is “China Reliable Process Instrumentation Supplier”.

SILVER AUTOMATION INSTRUMENTS is JIANGSU RUNDI INSTRUMENT CO., worldwide, LTD sub-company, Silver focus on exporting process in str worldwide, and RUNYI manufacture parts of the instruments. RUNYI register capital is 30 million RMB, cover an area of 50000 square meters with 4000 square meter standard workshop and office buildings.

We have obtained ISO9001:20008 International Quality System Certifications, all of our products are manufactured in accordance with procedures strictly. The strong technical power and high educated staff is the core continual developing, we have close relationship with Nanjing University of Science and Technology, C hang Zhou University to ensure the instrumentation technology update. Our company obtained several Patent Certificates regarding to the process instrumentations. Even Though of this, we cannot ensure all of our qualified products can be manufactured by JIANGSU RUNYI INSTRUMENT CO., LTD, We still OEM from other instrumentation factories.

Silver Automation Instruments is always growing our instrumentation technology base to ensure that we can deliver the optimum instruments to our customers.

We are constantly striving to deliver high quality service and responsiveness to our customers.

We are always serving the reliable measurement equipments from China with satisfying price to all our beloved customers.

Capacitance Pressure Transmitter

Capacitance Pressure Transmitter Overview

SH Series industrial digital Pressure/Differential Pressure Transmitter is a multipurpose digital pressure transducer developed by Silver Automation Instruments., including capacitance pressure sensor /differential pressure transmitter and direct-coupled pressure/fluid level transmitter. Pressure transducer manufacturer makes them on the basis of the mature and dependable sensing technology, combining the advanced single-chip computer technology and sensor digital exchange technology.

16-bit single chip is adopted as industrial pressure transmitter core element, with its powerful function and high-speed calculation capacity ensuring the excellent quality of the pressure transmitter. The whole design frame focuses on pressure transducer dependability, stability and high precision and intelligentization, meeting the growing demand in on-site industrial pressure measurement use. To get this goal, digitalized signal processing technology is used in the software to ensure pressure transducer disturbance capacity and zero point stability. Meanwhile, it has the Zero Stability Capacity (ZSC) and Temperature Supplementing Capacity (TSC). As a China pressure transmitter supplier, we provide cheap pressure transmitter/ differential pressure transmitter but with good quality.

The powerful interface functions guarantees an excellent interactivity with no need of manual operator. It is pressure indicating transmitter, can display 3 physical parameters including pressure, temperature and current, and 0-100% analogue indications. Keystroke operation can finish the basic settings of zero transfer, range setting, damping setting under the circumstance of no standard pressure, greatly convenient for the on-site debugging.

SH series digital Pressure transmitter / Differential Pressure Transmitter has the optional HART module. After the pressure transmitter is added the HART module, the pressure transducer has HART communication capacity, with the conventional operation being controlled with the general manual operator. The special communication equipment and soft- ware provided by our company can operate the marking and temperature supplementation actions.

SH series Digital Pressure transmitter / Differential Pressure Transmitter can be widely used in the sectors such as petroleum, chemical, iron & steel, power supply, light industry and environmental protection, capable of realizing the measurement of various gauge pressures, differential pressures, flows and fluids, adaptable for all kinds of harsh and hazardous environment and corrosive agents.

Features of Capacitance Pressure Transmitter

• High accuracy
• No mechanical and movable parts, little maintenance work
• Span and zero continuous and adjustable from outside
• Good stability for capacitive pressure sensor
• Positive shift amount to 500%; Negative shift 600%
• Two-wire system 4~20mA DC,it is analog pressure sensor
• Damping adjustable, overpressure protection
• Solid components, patch-type printed circuit board
• Explosion-proof structure, all-day use
• Unified structure, strong interchangeability of parts
• Miniaturization(total height 166mm)
• Diaphragm materials of contacting mediums option (316L, TAN, HAS-C, MONEL, etc.)
• smart HART protocol

Working Principle of Capacitance Pressure Transmitter

Pressure or differential pressure will cause some changes in the pressure sensor resistance value and the output value of bridge voltage. Through A/D conversion, pressure sensor will change into the digital signal which is sent to the microprocessor for calculation; then a current control signal will be output to the current control circuit, converted into analogue 4-20mA current output. Meanwhile, the microprocessor is responsible for the interactive and other actions (display and setting).

Function Parameters of Capacitance Pressure Transmitter

• Service: Liquid, gas and steam
• Measuring range : 0~0.06 kPa to 0~40Mpa
• Output signal : 4~20mA DC (four-wire 220V AC power supply, 0~10mA DC output options)
• Power supply : 12~45V DC, generally 24V DC.
• Loading characteristic: relation equation of loading impedance RL and power voltage Vs: RL <= 50(Vs-12) (see right figure for load characteristic)
• Indicator: pointer-type linearity indication 0 ~ 100% scales or LCD indicator, LED indicator.
• Explosion proof: a. Explosion isolation  d II BT4 ; b. Intrinsically safe ia II CT6
• Positive and negative shifts:

After positive and negative shifts of zero point, absolute values of upper-and-lower-limit values of span and measuring range should not exceed 100% of upper limit of measuring range.( smart type : turn down ratio 15:1) ;

Maximum positive shift is 500% of minimum adjusting span;

Maximum negative shift is 600% of minimum adjusting span.

• Temperature range:

Amplifier operation temperature range: -29 ~ +93°C

Measuring component of fill silicone oil: -40 ~ +104°C

Flange type transmitter fill hi-temperature silicone oil: -20 ~ +315°C

normal silicone oil: -40 ~ +149°C

• Static pressure : 1,4, 10, 25, 32Mpa
• Humidity : relative humidity 0~100%RH
• Volume absorption : < 0.16cm3
• Damping (phase step response) : When filling silicone oil, generally between 0.2s and1.67s, continuous and adjustable

Technical Data of Capacitance Pressure Transmitter

• (Under following condition: no shift, in standard operation conditions, fill silicone oil, 316 SS diaphragm)
• Accuracy: +/-0.075%,+/-0.1%,+/-0.25%,+/-0.5%
• Dead zone: no (<=0.1%)
• Stability: within 6 months not beyond absolute value of basic error of maximum span
• Vibration effect: on a random ax upward, at vibration frequency of 200 Hz, error +/-5%/g of upper limit of measuring range.
• Power effect: < 0.005%/V of output span
• Loading effect: no effect from loading at stable power
• Effect of installation position: Max 0.24kPa of zero error but adjustable, no effect on span

Other details of Capacitance Pressure Transmitter

• Diaphragm: 316 SS, Hastelloy C -276, Monel or Tantalum
• Exhaust/vent Valve: 316 SS, Hastelloy C or Monel
• Flange and Connector: 316 SS, Hastelloy or Monel
• “O” ring: acrylotrile-butadiene rubber, fluorine rubber
• Fill liquid: silicone oil or inert oil
• Blot: 316 SS
• Electronic Body Material: low copper-aluminum alloy
• Process connection:

Flange NPT 1/4, center distance 54mm;

Process connector NPT 1/2 or M20 ×1.5 male round-cone surfaces sealed, when carrying connector the center distance 50.8, 54, 57.2mm (NPT taper thread accords with GB/T12716-91)

• Electrical Connection: G 1/2"
• Weight: 4.5 kg (standard type)

Dimensions of Capacitance Pressure Transmitter

Size of M

M	*Type	1200	1300	1400	1500	1600	1700	1800	1900	1000	2300
	Size(mm)	54				55.6		57.2	58.4	59.2	54
	*Type	2400	2500	2600	2700	2800	5600	6600	7600	8600	9600
	Size(mm)	54		55.6		57.2	55.6
	*Type	5700	6700	7700	8700	9700	6800	7800	8800
	Size(mm)	55.6					57.2

Note: *Type: see the selection codes for detailed information of types