SeoJin Instech, Seojin , Seojin Instech Vietnam

SMC-7 Series Vertical Float Type Level Switch


Vertical Float Type Level Switch
This Product is a unique level switch as a critical Process Instrument covering high pressure and high temperature.
Chamber material for this product is not only carbon steel, but also many variety steel materials including 316LSS and 304SS.
This product han been produced for suitable in water and boiler control process, metting various industrial standards and requirements to solve erroneous causes that have occurred in conventioinal industrial fields.
The customizing for this product is possible for specific operational condition and anti-corrosion. Please contact our sales staff if you have andy special design for ths product.
•SMC-73 : Max. 46 BAR
•SMC-75 : Max. 70 BAR
• Can be used for vessel under high pressure and temperature
• Designed to ASME B31.1
• Weather poof / Explosion proof / Frame proof
• Unique and reliable : Snap acting switch mechanism
• Vibration resistant - eliminates fate trips by special spring
• A wide variety of chambers can be used
• Multiple switches can be assembled in a unit for economical purpose
• Weld procedures approved to KEPCI MQ and ASME IX
• Qualified to IEEE 323-2003, and IEEE 344-2004
• Applicable to hermetical seal type snap action switch
• Standard : 1 SPDT
• Optional : 1 DPDT
• Contact Rating : 
10A 250V AC / 0.6A 125V DC 
5A 250V AC / 0.5A 125V DC
1A 250V AC / 1A 30V DC
15A 250V AC / 1A 125V DC
1A 115V AC / 3A 28V DC


SFP Pneumatic Type Level Switch


Pneumatic Type Level Switch
A pipe (with its lower part opened) is cut in the length of the electric contact's location, and sealed with a sensor, and then installed; the level of the fluid rises, increasing the pressure in side the pipe, and this water pressure pushes up the expanded diaphragm in the lower sensor, operating the Micro S/W connected to the upper part, for output. It is mostly used for open type fluid tanks that do not have pressure. When a H/L electric contact is required, two sensors are used. The on-off operation static head difference is 20mm. This model also is a unique product of our company. 
•Standard : None(on-site Pipe 
assembly type)
•Optional : Provision of basic 
1,000mm pipes (the installed 
length can be freely adjusted)
•On-site detection location 
adjustment installation
•Best for slurries or high 
viscosity fluids 
•Easy installation
•Contact capacity : 10A 250V AC
•Waste water tank and processing 
•Sewage processing plant 
•Chris, Jam, Ketchup, Food and 
Beverage tank 
Mat'l : 304SS, PVC


SPT/SPL Pressure Type Level Transmitter


Pressure Type Level Transmitter
The subtle voltage signal, generated by the diaphragm type piezoelectricity particle installed in the sensor, and the static head difference according to the change of the fluid level, sunken in the bottom of the measured substance, is transformed into an electric current signal of DC 4∼20mA to be put out. Installation is very easy, and it can be easily used in narrow and deep wells or river dams with diagrams within 1 inch in unfrozen conditions of the atmospheric pressure. 
•Easy installation 
•Easy to install at tanks 
without high ceilings or 
•Easy maintenance and repair 
4∼20mA DC
24V DC
•Well, water ways, dam,
reservoirs, etc. 
•Water purification plant 
Mat'l : 304/316SS