Gas Electronic type Flow Switch NK300A Series

Technical Specifications Table

• Setting range: 1… 150 cm/s (water), 3… 300 cm/s (oil)
• 20… 2000 cm/s (air)
• Signal output: PNP, NPN, relay
• Normally open+normally closed (SPDT)
• Power supply: 24V ± 20% DC or 230V ± 15% AC
• Connecting current: maximum 400mA (PNP or NPN type)
• NK300 maximum 4A (relay type); NK600 type maximum 1A@48ac /dc
• No load current: maximum 80mA
• Flow indicator: LED row (6 pieces)
• Setting method: Potentiometer setting
• Pressure resistance range: 100bar
• Temperature gradient: 4 ℃/S
• Response time: 1-13S, typical value of 2S
• Initialization time: 8S
• Electrical protection: reverse phase, short circuit, overload protection
• Protection level: IP67
• Medium temperature: -20-100 ℃
• Environmental temperature: -20-80 ℃
• Storage temperature: -20-100 ℃
• Wiring method: M12 connector/directly attached 2-wire optional
• Material: Probe: Stainless Steel
• Shell: Stainless steel PBT
• Weight: 0.4Kg
• Repeatability accuracy: ± 2% of measured values
• Note:
  For specific installation and usage, please refer to the above parameters. If you have any questions, please contact our company in a timely manner.
  If any problems are found during use, please contact the supplier in a timely manner. It cannot be easily disassembled. If such a situation occurs, our company will not be responsible and reserves the right to pursue legal action
  Corresponding legal responsibilities.

Functions and Features

Based on the thermal principle, there are two resistors inside a closed probe, one of which is heated as the detection resistor and the other is not heated as the reference resistor. When
When the mass flows, the heat on the heating resistor is carried away. The resistance value has been changed. The difference between two resistors is used as the basis for determining the flow rate. No moving parts, maintenance free, safe
Easy to install, one model is suitable for multiple pipe diameter requirements. The switch quantity is continuously adjustable, with extremely low pressure loss and compact structure. LED displays flow trends and switch status.
2.1 Practical Application
● Gas liquid dual-use type, can be used for pneumatic and hydraulic systems, can be used for flow monitoring of circulating water, cutting fluid, and lubricating oil, as well as pump idle protection.
Comparison table of flow range settings for different media.

Size chart