Dual Input Thermometer Extech

Extech 421502 Dual Input J/K Digital Thermometer

High-Precision Thermometer with Dual Display, Programmable Alarms, and Differential Temperature Measurement

The Extech 421502 is a high-precision digital thermometer designed for demanding field applications and industrial environments requiring rigorous temperature monitoring. This dual-input instrument delivers an exceptional basic accuracy of 0.05% and supports simultaneous Type J and Type K thermocouples. Its rugged housing is protected by a durable protective holster with an integrated stand, making it ideal for continuous diagnostics in HVAC systems, manufacturing processes, and material quality control.

The instrument features a large dual LCD display that simultaneously shows individual readings from each channel (T1 and T2), the differential temperature (T1 - T2), and elapsed time. The 421502 includes advanced analysis functions such as MIN/MAX/AVG recording, Data Hold, Relative mode, and programmable audible high and low temperature alarms that immediately notify users whenever preset limits are exceeded.

Key Features

• Exceptional measurement accuracy with a basic accuracy of 0.05% for reliable and stable temperature readings.
• Complete differential temperature analysis using two Type J, two Type K, or a combination of both thermocouple types.
• Large dual LCD display with elapsed timer for simultaneous monitoring of T1, T2, and T1-T2 differential.
• Programmable audible High and Low temperature alarms for improved process monitoring.
• Advanced statistical functions including MIN/MAX/AVG, Data Hold, and Relative measurement mode.
• Heavy-duty protective holster with an integrated tilt stand for convenient hands-free operation.

• Specifications
• In the Box
• Required Items
• Optional Accessories
• Documents

• Basic Accuracy	0.05%
  Inputs	Dual Input, Simultaneous Type J and Type K
  Included Probe Range (Type K)	-20 to 250 °C (-4 to 482 °F)
  Functions	MIN/MAX/AVG, Data Hold, Relative Mode, Differential Temperature (T1-T2), Elapsed Time
  Alarms	Programmable Audible High and Low Temperature Alarms
  Power Supply	1 × 9V Battery

• • 1x Extech 421502 Dual Input J/K Digital Thermometer

• None: Ready to Use!

• • 9V Battery
• • User Manual (English)
  • Datasheet (English)