Fluke 51 II | Single-Input Digital Contact Thermometer

Process, laboratory and maintenance work often requires direct-contact temperature measurement over a wider range than ordinary probes or infrared thermometers can cover. The Fluke 51 II Digital Thermometer is a rugged single-input instrument designed for professional thermocouple measurements with laboratory-level accuracy in the field.

It accepts J, K, T and E thermocouples, allowing users to select probes suited to air, liquid, surface or process measurement. A large backlit dual display improves readability, while Min, Max and Average recording helps capture temperature changes during inspections. An electronic offset function compensates for thermocouple error to improve overall system accuracy. Depending on the selected thermocouple, temperature capability extends from cryogenic values to well above 1000°C. Battery life is approximately 1000 hours under typical use.

Single-Input Thermometer Selection Guide

Choose the 51 II when one thermocouple input is sufficient and data logging or differential temperature measurement is not required. Choose the 52 II when you must measure two temperatures simultaneously.

Market Relevance

The Fluke 51 II suits Pakistani industrial maintenance, laboratories, HVAC/R, process plants, food production, and quality-control departments that require dependable contact-temperature measurement. Kamadi Pakistan offers the Fluke 51 II for accurate professional thermocouple testing.

Key Features

• Single thermocouple input
  
• Supports J, K, T and E probe types
  
• Min/Max/Average recording
  
• Backlit dual display
  
• Electronic offset compensation
  

Technical Specifications

• Model: Fluke 51 II
  
• Inputs: 1
  
• Thermocouple Types: J, K, T, E
  
• J-Type Range: -210°C to 1200°C
  
• K-Type Range: -200°C to 1372°C
  
• T-Type Range: -250°C to 400°C
  
• E-Type Range: -150°C to 1000°C
  
• Accuracy Above -100°C: ±(0.05% + 0.3°C)
  
• Battery Life: Approx. 1000 hours
  
• Weight: Approx. 0.4 kg
  

Applications

• Process-temperature measurement
  
• HVAC/R testing
  
• Laboratory work
  
• Food and production monitoring
  
• Equipment maintenance
  

Professional Tip: The thermometer's accuracy is only part of the measurement system—select a thermocouple probe whose construction, response time and temperature rating suit the actual application.