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Pocket-sized digital thermometer with transparent case and LCD display

Uei Test Instruments

Uei Test Instruments PDT550 Digital Thermometer

SKU CH-3VBJ-X43MC

Pocket-sized digital thermometer measuring -58 °F to 572 °F with a 3.5 in stem and 4-digit LCD display

  • Product colorTransparent
  • Wide temperature range covers -58 °F to 572 °F
  • Celsius scale reaches -50 °C to 300 °C for global use
  • 5 in stem reaches into ducts and pipes easily
  • Compact 1/2 in high display with 4-digit LCD reads clearly
  • Pocket-sized design fits in a technician’s hand or tool pouch

Pocket Digital Thermometer

The Uei Test Instruments PDT550 is a compact digital thermometer designed for quick temperature checks in HVAC and general service work. Its 3.5 in stem reaches into ducts or pipes while the 4-digit LCD shows readings clearly. The unit operates from -58 Degrees to 572 Degrees F and -50 Degrees to 300 Degrees C. It arrives new and includes no NIST-traceable certificate.

Technicians needing fast spot measurements

This tool suits technicians who need a portable probe for immediate temperature verification on the job. Buyers who require a calibrated instrument with documented traceability for quality audits should look at something else. The pocket format also limits use in applications that demand longer insertion depths or continuous data logging.

Temperature range -58 Degrees to 572 Degrees F

The single specification that decides fit is the measurement span of -58 Degrees to 572 Degrees F (-50 Degrees to 300 Degrees C). If the work stays within these limits the PDT550 covers the task; if the process exceeds either end the thermometer cannot be used.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 84% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameUEI TEST INSTRUMENTS
Product colorTransparent

Questions about this item

Will the PDT550 fit alongside my existing HVAC probes with a 3.5 in stem?

The PDT550 has a 3.5 in stem length, so it matches probes of the same dimension and fits standard pipe openings.

How can I confirm the PDT550 is reading correctly after I set it up?

Check that the 4-digit LCD shows values between -58 °F and 572 °F, or -50 °C and 300 °C, which are the stated operating ranges.

Does the PDT550 package include a NIST-traceable certificate or must I buy one separately?

The supplier notes specify that a NIST-traceable certificate is not included, so you would need to obtain calibration documentation separately.

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