Thermal Flow Switch Technical Specifications

Brand：NOIKE-AH
Model：NK210

Specification

Principle characteristics

Based on the thermal principle, the sealed probe contains two resistors, one of which is heated as the detection resistance, the other is not heated as the reference resistance, when the medium flows, the heat on the heating resistance is taken away, the resistance value is changed, and the difference between the two resistors is used as the basis for judging the flow rate. No moving parts, maintenance-free, easy to install, one model is suitable for a variety of pipe diameter requirements, the switching quantity is continuously adjustable, extremely low pressure loss, compact structure, color crystal display flow trend and switching state, integrated temperature measurement function, support temperature alarm and remote measurement.

Principle characteristics

Water and oil gas general purpose, gas-liquid dual-purpose, low flow rate alarm, can be used for pneumatic and hydraulic systems, can be used for circulating water, cutting fluid and lubricating oil cut-off detection, and pump idling protection.

Product application

New digital design
Replace traditional thermal flow switches
Integrated temperature integration function
Save installation space
Color crystal digital visual display window

Technical parameter

Flow range: 0.01… 2.0m/s(water)
Temperature range: 0… 100 °C
Temperature accuracy: probe immersed in the medium ±1.5°C
Signal output: temperature (PNP/NPN/IO-link, analog value 4… 20mA,1-5V)
flow (PNP/NPN/IO-link, analog quantity 4… 20mA,1-5V)
Power supply: 24V±20%DC
Connecting current: Maximum 200mA(PNP or NPN type)
Current consumption: < 100mA
Flow display: Color crystal display (0.96 inch)
Temperature display: Color crystal display (0.96 inch)
Setting mode: button setting
Pressure range: 100bar
Temperature gradient: ≤4°C/S
Measuring dead zone: ≤0.01m/s
Response time: 1-13s, typical value 2s
Initialization time: < 16s
Electrical protection: reverse phase, short circuit, overload protection
Protection grade: IP67
Medium temperature: 0… 100°C
Ambient temperature: -20… 80°C
Storage temperature: -20… 80°C
Connection mode: M12 connector
Material:
Head: stainless steel/engineering plastic
Housing: stainless steel
Liquid material: Stainless steel 316L/EPDM (EPDM)