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Digital pocket thermometer with 4-digit LCD display and 5-inch stem

Uei Test Instruments

Uei Test Instruments 550B Pocket Thermometer -58°F to 572°F

SKU CH-B9DW-YVG26

Digital pocket thermometer measures -58 °F to 572 °F with a 5-inch stem and 4-digit LCD display

  • TypeEnvironmental & Mechanical
  • Wide temperature coverage from -58 °F to 572 °F
  • Metric range spans -50 °C to 300 °C
  • 5-inch stem reaches into ducts and machinery
  • 4-digit LCD with 1/4-inch digits for clear reading
  • Backed by UEI Test Instruments quality

Digital Pocket Thermometer

The UEI Test Instruments 550B is a compact digital thermometer built for technicians who need fast temperature checks in HVAC, electrical or automotive work. It fits in a pocket and delivers readings without the bulk of larger meters. This tool suits professionals who value portability and a clear display for routine diagnostics.

Thermals noise and power draw

The instrument operates on battery power with no fan or moving parts, so it runs silently and adds negligible heat to the measurement environment. Its low current draw supports extended field use between battery changes. There are no thermal management concerns during normal operation.

NIST-traceable certificate impact

The unit ships without a NIST-traceable calibration certificate, so users requiring documented traceability for quality systems must arrange certification separately. The 4-digit LCD with quarter-inch digits provides clear readouts in both Fahrenheit and Celsius scales. The five-inch stem reaches into ducts or enclosures where shorter probes cannot.

Highlights

  • Wide temperature coverage from -58 °F to 572 °F
  • Metric range spans -50 °C to 300 °C
  • 5-inch stem reaches into ducts and machinery
  • 4-digit LCD with 1/4-inch digits for clear reading
  • Backed by UEI Test Instruments quality

Specifications

BrandUEI TEST INSTRUMENTS
TypeEnvironmental & Mechanical

Questions about this item

How do I install the thermometer probe into the 5-inch stem for the first reading?

Insert the probe fully into the stem until it seats firmly, then power on the unit and wait for the 4-digit LCD to stabilise before taking a measurement

What maintenance will the 550B pocket thermometer need after regular use?

Wipe the 5-inch stem and LCD window with a dry cloth after each session; replace the internal battery when the display dims or readings drift

What limit appears first during continuous high-temperature testing?

The 572 °F upper measurement limit is reached before any other constraint, so sustained readings above that value cannot be displayed

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