NR-81520-K4A thermocouple
Key Specifications

• Sensor Type: K-Type Thermocouple (Chromel-Alumel)
• Probe Style: Magnetic adsorption base (sticks to conductive metals like steel or iron) 
• Temperature Range: Typically -50°C to 500°C (common for the NR-81520 magnetic series; high continuous heat may weaken magnetic strength) 
• Cable Design: Retractable/coiled spring wire for easy expansion and break protection
• Application: Measuring surface temperatures of molds, casting plates, bearings, machinery, and exterior walls of industrial equipment 
• Compatibility: Standard K-type connector plugs compatible with most digital thermometers and multimeters 

Could you tell me what specific surface or equipment you plan to measure (molds, pipes, engines, etc.) so I can confirm if the K4A magnetic probe is the right fit or suggest an alternative?