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Thermal Gas Flow Switch Flowmeter-SN33

Product introduction

The SN33 Thermal Gas Flow Switch/Flow Meter is a flow measurement instrument that utilises the principle of heat transfer. The instrument uses the constant temperature difference method to accurately measure the gas flow rate. It has the advantages of small size, high degree of digitisation, easy installation and accurate measurement.
Once a fluid has flowed through the instrument, the heated PT100 will take away the heat from the PT100, the heat taken away by the PT100 will cause the resistance value to rise, the rate of rise has a certain relationship with the flow rate of the fluid, so the flow rate can be detected by measuring this resistance value. In addition, the built-in temperature sensor compensates for the fluid temperature or ambient temperature, so the measurement is stable over the operating temperature range.

Product Features Product Applications Technical Parameters Dimension Drawing Selection Table

-Flow rate setting and detection with digital labelling.
-Detection and display in one unit.
-Switching output, totalised pulse output and analogue output are available.
-Instantaneous flow rate and totalised flow rate can be switched.
-Safety locking key prevents incorrect change of setting value, etc., and prevents misoperation.

-Purge air management in the semiconductor industry, high-precision lead tension bonding, and electronic component placement.
-Factory air management (air, nitrogen), air consumption monitoring of pneumatic parts.
-Paint air management for the automotive industry, railways and other vehicles.
-Burner fire control management in the glass industry and negative ion purification gas management for FPD handling in the liquid crystal industry.
-Filling and packaging, leakage checking in the food industry, CO2 management and photosynthesis promotion in biochemical incubators, and arc welding monitoring at the factory level. Machine tool support, etc.

Model number SN33-100 SN33-200
Measuring medium Air, nitrogen
Flow rate indication range 10-100L/Min 20-200L/Min
Display function Instantaneous flow rate, cumulative flow rate
Temperature of the medium 0~50℃
Accuracy ±3%F.S
Repeatability ±1%F.S
Ambient temperature characteristics ±2%F.S (15~35℃, 25℃ base), ±3%F.S (0~50℃, 25℃ base)
Current consumption Below 160m A
Pipe calibre (Rc,NPT.G) 3/8
Measuring method Thermal principle
Number of display digits 4-digit 8-segment LED
Pressure range -50KPaA 0.75MPa
Maximum withstand pressure 1.0MPa
Cumulative flow rate range 0~999999L
Outputs NPN open collector Maximum load current: 80 mA, internal voltage drop: 1V or less (at 80mA load current) Maximum applied voltage: 30V, 2 outputs
PNP open collector Maximum load current 80mA, Internal voltage drop: 1.5V or less (at 80mA load current), 2 outputs
Accumulated pulse, current output
Control indicator Light on when ON Output OUT1: Green Output OUT2: Red
Response time less than 1s
Hysteresis Hysteresis mode: Variable (can be set from 0) Upper and lower limit comparison modeNote 1): Fixed (3digits)
Supply voltage DC12~24V士10%
environmental resistance Protection class IP65
Operating temperature range Operation: 0~50°C, Storage: -25~85°C (but without freezing and condensation)
Withstanding voltage AC1000V, 1 minute between external terminals together and enclosure
Insulation resistance 50MΩ or more (DC500V megohmmeter) between the external terminals together with the housing
Note 1. Upper and lower limit comparison mode: hysteresis (H) is 3digits,P_1,P2 or n_1,n2 should be more than 7digits apart.
(In case of output OUT2, n_1,2 becomes n_3,4 and P_1,2 becomes P_3,4).

SN33- 100  G N M G D Details
SN33-               SN33 Series Thermal Gas Flow Switches/Flowmeters
  100              10-100L/Min
  200              20-200L/Min
    G           National Threads
    N           NPT
    K           Pneumatic Snap-In
              1/8
              1/4
              3/8
              1/2
        N       NPN Switches
        P       PNP Switches
        PUSLE       Pulses
        4-20mA       Currents
          M     M12 Plugs 3M
          N     No Leads
            G   Fixed Unit Displays
            T   Adjustable Unit Displays
              D Custom Specifications
    * The selection table is for parameter selection only and is shipped with the corresponding code for the parameter.
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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