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Product selection guide: Contact thermometers

Use our product selection guide to find the thermometer that fits your needs best.
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Fluke 54 II B Dual Input Digital Thermometer with Data Logging
Fluke 51 II Single Input Digital Thermometer 1
54 II B Data Logging Thermometer with Dual InputFluke 51 II Handheld Digital Probe Thermometer
Non-contact temperature range500 °C (+932 °F)500 °C (+932 °F) 
Recommended usesLaboratory, quality assurance, process calibration, food safety, HVACLaboratory, quality assurance, process calibration, food safety, HVAC 
Probe typeThermocouple K, J, T, E, N, R, SThermocouple K, J, T, E 
Number of inputs21 
Temperature rangeT-type: -250 °C to +400 °C (-418 °F to +752 °F)T-type: -250 °C to +400 °C (-418 °F to +752 °F) 
Number of on-board memory locations500 
PC download and softwareFlukeView Forms 
What temperature range do you need to measure?500 °C (+932 °F)500 °C (+932 °F) 
Do you need to download data for analysis and reporting?  
Do you need on-board memory for trending and comparison?  
Do you need to save photos of your measurements for your reports?  
Will you do any hands-free, real-time temperature monitoring with a PC?  
Form factorFlatFlat 
Dimensions, approximate (H x W x D)17.3 x 8.6 x 3.8 cm (6.8 x 3.4 x 1.5 in)17.3 x 8.6 x 3.8 cm (6.8 x 3.4 x 1.5 in) 
Warranty3 years3 years 
Battery3 AA 
Temperature areaSurface temperatureSurface temperature 
Time stampTime of dayRelative 
Min-Max-Avg-DifMin-Max-Avg-DifMin-Max-Avg-Dif 
Hands-free logging  
Will you use the thermometer in a hazardous location where there might be explosive gases?  
Do you want to use industry standard thermocouples?