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Thermal Gas Mass Flow Meter-SN50A

Product introduction

SN50A series thermal gas mass flowmeter is the use of the principle of heat conduction flow measurement instrument.The instrument uses the method of constant temperature difference to accurately measure the mass flow of gas.It has the advantages of small size, high degree of digitalization, convenient installation and accurate measurement.The sensor part consists of two benchmark platinum resistance temperature sensors.With a bridge loop, one sensor measures the flow temperature and the other maintains a thermostatic difference above the fluid temperature, allowing flow measurements under high temperature and pressure conditions. Real mass flowmeter, gas flow measurement without temperature and pressure compensation, measurement is convenient and accurate.The mass flow rate or standard volume flow rate of the gas can be obtained. Wide range ratio, can measure the gas flow rate up to 100Nm/s bottom to 0.5nm /s, can be used for gas leak detection.good seismic performance long service life.The sensor has no moving parts and pressure sensing parts and is not affected by vibration to the measurement accuracy. Easy to install and maintain.If site conditions permit, installation and maintenance without stopping production can be realized.(See Safety Precautions) Digital design.The whole digital circuit measurement, accurate measurement, easy maintenance. Adopt RS-485 communication, or HART communication, can realize factory automation, integration.

Technical Specification Measuring Range Insert Rangegauge Map Size Flange Size Drawing Selection Table
The connection
method
flange form  DN25~ 150mm
screw-type DN25~50mm
plug-in     DN125〜5000mm
Measuring the
dielectric
Single component or compartment-stable mixed dry gases (except B block gas and oxygen)
medium temperature (1 ) -10°C- + 100°C               (2) -10°C- +200C
The environment 一20°C~ +45°C
Pipe size DN25~5000mm
The output signal (1) 4-20mA (photoelectric isolation, maximum load of 500 Q), pulse, RS485 (photoelectric isolation), HART protocol
Alarm output (1) 1-2 circuit relay normally open contact, (10A/220V/AC, 5A/30V/DC)
Power supply ( 1 )DC24V                  ( 2 )AC220V            ( 3 )18 w w power consumption
Tube (1) 304 stainless steel (2) 316 stainless steel
pressure rating P2=1.6MPa (standard)DN125~5000mm insert type
P2=1.6MPa (standard)DN25~ 150mm flange type, DN25~ 50mm thread type
P3= 2.5Mpa (special)DN25 ~ 100mm flange type
P4= 4.0Mpa (special)DN25 ~ 100mm flange type
Header indicating Standard volume instantaneous flow, cumulative flow, standard flow rate, current output value, etc
level of protection IP65
measurement accuracy ±(1.5+0.5FS) %
Medium flow rate General: 0.56~56Nm/s, the maximum flow rate can be extended to 100 Nm/s (range width can be negotiated for order)
note Front N20DN and rear N10DN are required for straight pipe segments. For example, 90°C elbow or pipe expansion, please refer
to the instructions for details
Threaded DN15~25mm range gauge
DN minimum discharge
      (Nm³/h)
maximum flow
(Nm³/h)
15(G 72") 0.3  30 
20(G 74") 0.5  50 
25(G") 100 

 

Flanged DN25~150mm range gauge

DN
(mm)
minimum discharge
(Nm³h)
maximum flow
(Nm³h)
25  100 
32  1.5  150 
40  250 
50  400 
65  6.5  650 
80  10  1000 
100  15  1500 
125  25  2500 
150  35  3500 
DN
(mm)
minimum discharge
(Nm³h)
maximum flow
(Nm³h)
DN
(mm)
minimum discharge
(Nm³h)
maximum flow
(Nm³h)
50  400  800  1000  100000 
65  6.5  650  900  1300  130000 
80  10  1000  1000  1600  160000 
100  15  1500  1100  1950  195000 
125  25  2500  1200  2280  228000 
150  35  3500  1300  2680  268000 
125  25  2500  1400  3100  310000 
150  35  3500  1500  3560  356000 
200  65  6500  1600  4050  405000 
250  100  10000  1700  4560  456000 
300  150  15000  1800  5150  515000 
350  200  20000  1900  5750  575000 
400  250  25000  2000  6350  635000 
450  320  32000  2500  9500  950000 
500  400  40000  3000  14000  1400000 
550  480  48000  3500  19000  1900000 
600  560  56000  4000  24000  2400000 
650  680  68000  4500  30000  3000000 
700  780  78000  5000  38000  3800000 

nominal diameter
DN
pressure rating
MPa
contour length
L
height of contour
H
center flange outer diameter  tap
 n-d
thread specification Flange thickness B
25  1.6  305  320  85  115  4x 014 M12 16 
32  1.6  310  324  100  140  4 x 018 M16 18 
40  1.6  320  327  110  150  4 x 018 M16 18 
50  1.6  396  332  125  165  4 x 018 M16 20 
65  1.6  410  340  145  185  4x 018 M16 20 
80  1.6  420  348  160  200  8x 018 M16 20 
100  1.6  457  360  180  220  8x 018 M16 22 
125  1.6  500  372  210  250  8 x(P18 M16 22 
150  1.6  500  387  240  285  8x 022 M20 24 
SN50A A DN A D A detailed
SN50A-               SN50A series themal gas mass flowmeter
  A             Thread-forming screw
  B             flange form
  C             plug-in
    DN           Size,e.g.DN25,Type 25(Refer to Range
      A         Normal temperature:-10..100 ℃
      B         High temperature style:0...200℃
              Two-way switching quantity (relay)
              4-20 ma output
          C     Pulse output
          R     RS485 communication
          H     HART protocol
            D   Power supply:24V DC
            A   Power supply:220V AC
              A Pressure withstand:1.6MPa (standard)
              B Pressure withstand:2.5MPa(special)
              C Pressure withstand:4.0MPa(special)
*The selection table is only available for parameter selection,and the corresponding code is delivered.
Shanghai Kayuan Electronic
Technology Co., Ltd.
Shanghai Kayuan Electronic Technology Co., Ltd is an enterprise specializing in the production and R&D of industrial fluid sensors and controllers. Its main products include switches and sensors for flow, pressure, temperature, and liquid level. In 2008, our assembly plant was established in Shanghai, China, to produce the PAKU series of products. We adopt advanced technology and manufacturing processes across the board. With our professional design and production technology, comprehensive product lines, excellent quality, and sales network services, we can not only provide users with timely and professional technical support but also offer high - quality one - stop services. The company has set up various departments such as the purchasing department, R & D department, quality management department, finance department, sales department, after - sales department, general office, laboratory, archive room, calibration workshop, production workshop, inspection area, storage area, shipping area, and a tea break room, aiming to provide products of excellent quality and sincere services. We adhere to the customer - centric concept of creating value for customers. According to the industry needs of customers, we continuously update technology and optimize services, aiming to become a leader in the field of process automation. PAKU products are now widely used in different industries, including automation complete sets of equipment, petroleum equipment, chemical equipment, power equipment, welding equipment, steel equipment, metallurgical equipment, automobiles, and water treatment. We have served many customers at home and abroad, and our products are sold to countries such as Canada, the United States, Brazil, Indonesia, Vietnam, Thailand, and Russia. In the increasingly competitive global market in the future, PAKU will, as always, serve a wide range of domestic and foreign customers with excellent quality, reasonable and competitive prices, on - time delivery, and perfect after - sales service. We welcome extensive cooperation with OEM and ODM customers.
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