Flange type Thermal Conductivity Flow Switch (explosion-proof )NK33EX

Introduction

Thermal dispersion flow switch is a precise flow sensing device, whose movement principle is heat diffusion. The probe consists of two temperature sensors. One sensor measures the temperature of the fluid when the probe is immersed. The other sensor is heated by a constant power. This creates a temperature difference between two sensors.

Temperature difference is an inverse ratio to the flow velocity. The probe and housing are made by stainless steel or engineering plastic.

This creates a temperature difference between two sensors. Temperature difference is an inverse ratio to the flow velocity. The probe and housing are made by stainless steel or engineering plastic.Flange type explosion-proof flow switch.

Specification

• Flow velocity: 1~150 cm/s (water), 3~300 cm/s(oil) , 20…2000cm/s （gas）
• Warm-up time: 15 sec. (approximate)
• Flow indication: LED row (6)
• Setting method: potentiometer setting
• Medium temperature change: ≤4 ℃ / s
• Electrical protection: reverse phase, short circuit, overload protection(VSNK600)
• Operation temperature:-4⁰F~176⁰F (-20⁰C~80⁰C)
• Ambient temp: -4⁰F~176⁰F (-20⁰C~80⁰C)
• Operation pressure: 100 bar
• Housing rating: IP67
• Enclosure material/rating: Cast aluminum / Wetted materia: 304SS
• Explosion-proof grade: Ex db IICT6 Gb / Ex tb IIC T80C Db

 Wiring