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Help CenterThermal Conductivity Flow Switch Water Oil Gas NK100
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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.
NK600 series
Fearture:Since the device is without moving parts, therefore there is no wear and tear problem. and sensitivity individually. User can set the alarm and sensitivity easily.
Under normal operating conditions, no special maintenance is required. Contamination on the probe of NK600EX series could change its property. If necessary, using a suitable solvent to clean the surface of the probe periodically. After cleaning process, re-checking alarm setting and leakage of sealing ring is recommended.
Flow velocity: 1~150 cm/s (water), 3~300 cm/s(oil) or, water: 1~70 cm/s, oil: 2~100 cm/s
Warm-up time: 15 sec. (approximate)
Operation temperature:-4⁰F~176⁰F (-20⁰C~80⁰C)
Ambient temp: -4⁰F~176⁰F (-20⁰C~80⁰C)
Operation pressure: 100 bar
Housing rating: IP67
Enclosure material/rating: PUR material
Wetted materia: 304SS
Supply voltage: 24Vdc± 20% or 220VAC± 20%
Output: Open collector---NPN / PNP, 400 mA max. (with current limiting).
Relay--- 1A/30Vdc, 0.3A/125Vac (NO or NC), 5A/250Vac max. (NO)
Order information:| Process connection | Power supply | Output | Probe length | Detailed Description | |
| NK100 | NK100 series flow switch | ||||
| G12 | 1/2” G | ||||
| G14 | 1/4” G | ||||
| M | Others | ||||
| H | External thread | ||||
| D | 24V±20%VDC | ||||
| W | 220V±20%VAC | ||||
| P | PNP output | ||||
| N | NPN output | ||||
| C | Relay output | ||||
| A | 4middot;middot;middot;20mA output | ||||
| R | NC+NO output（SPDT） | ||||
| Q | Probe lengthdagger; (unit: mm) （K）(15mmmdash;50mm) |
Ordering Tip: After the selection is completed, please check again whether the models are consistent with the requirements, the range is correct, the output signal is correct, there is an option, and the accessories are missing.
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