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Mechanical glass tube flow switch-SN31B

Product introduction

In-line mounted, mechanical flow switches for liquid or gaseous media. Robust plastic, aluminium or stainless steel housing available. Extremely low pressure loss, good repeatability, dirt immunity, complete isolation of the mechanical and electronic parts for economical use with small flow rates. Scale with on/off switch, no need for user setting on site. The glass tube displays the graduated flow rate.

Product Application Dimension Figure Technical Specification Selection Table

Pneumatic liquid dual purpose, industrial lautomation/mechanical equipment/air compression industry/refrigeration/lubrication industry and air conditioning.

Setting range: See parameters for details
Accuracy: ±5% total range
HySTERESIS: Depends on switching point, minimum 3L/Min
Wiring mode: M12 connector/direct outlet
Output: Dry reed switch
Pressure: 10bar
Medium temperature: 90°C Max
Optional protection IP65
Material: Shell: Aluminum alloy (display window PE material
Piston :POM plastic
Spring: stainless steel

SN31B - A G L A specification
SN31B -                 SN31B series glass tube flow switch
    A               Interface thread: G1/2
    B               Interface thread: G3/4
    C               Interface thread: G1"
                  DC DC24V±20% power supply
        G           internal thread
          L         Process connection: aluminum alloy
          X         Process connection: stainless steel
                  aluminium alloy housing
                  Range: 3-30L/min
                  Range: 5-50L/min
                  Range: 8-80L/min
                A   Connector type (standard with 2
                B   Straight out
                  1 switch point output
                  2 switching points output
 * Customizable thread, H for external thread, G for internal thread
 * For selection of electrical accessories and installation accessories, please refer to the appendix page on page -
 * 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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