Extech 421509 Thermocouple Datalogger

Extech 421509 Thermocouple Datalogger


The Extech 7 Thermocouple Dual Input Datalogger has a built-in PC interface with internal memory for up to 16 data sets.


  • 7 Thermocouple type selections: K, J, T, E, R, S, N
  • Large backlit LCD with two secondary displays
  • REC, MAX, MIN, MAX-MIN, AVG and °C/°F switchable
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The Extech Thermocouple Dual Input Datalogger allows for 7 Thermocouple type selections: K, J, T, E, R, S, N. Readings can be easily read on its large backlit LCD with two secondary displays. The secondary displays allow for simultaneous T1, T2, T1-T2, time and advanced readouts. Once the data is stored on the, it is connected to a PC via the RS-232 port.

Notable Specifications:
  • Type K range: -328 to 2501oF (-200 to 1372oC)
  • Type K resolution: 0.1o (0.2°>700oF)
  • Type K accuracy: ±(0.05% rdg + 0.6oF) -58oF to 2501oF
  • Type J range: -346 to 2192oF (-210 to 1200oC)
  • Type J resolution: 0.1o (0.2o>500oF)
  • Type J accuracy: ±(0.05% rdg + 1.4oF) -58oF to -346oF
  • Type T range: 328 to 752oF (-200 to 400oC)
  • Type T resolution: 0.1o (0.2o>600oF)
  • Type T accuracy: ±(0.05% rdg + 0.3oC) -50oC to 1370oC
  • Type E range: -346 to 1832oF (-210 to 1000oC)
  • Type E resolution: 0.1o (0.2o>450oF)
  • Type E accuracy: ±(0.05% rdg + 0.7oC) -50oF to -210oC
  • Type R range: 32 to 3212oF (0 to 1767oC)
  • Type R resolution: 1o
  • Type R accuracy: ±(0.05% rdg + 4.0oF) 32oF to 3212oF
  • Type S range: 32 to 3212oF (0 to 1767oC)
  • Type S resolution: 1o
  • Type S accuracy: ±(0.05% rdg + 2.0oC) 0oC to 1767oC
  • Type N range: -58 to 2372oF (-50 to 1300oC)
  • Type N resolution: .2oF (0.1oC)
  • Type N accuracy: ±(0.05% rdg + 1.6oF) -58oF to 32oF, (0.05% rdg + 0.8oF) 32oF to 2372oF, (0.05% rdg + 0.8oC) -50oC to 0oC, ±(0.05% rdg + 0.4oC) 0oF to 1300oC
  • Battery life: 100 hours typical
  • Dimensions: 7.5 x 3.6 x 2.1" (192 x 91 x 52.5mm)
  • Weight: 11.7oz (365g)
What's Included:
  • (1) Datalogger
  • (2) Type-K bead wire temperature probes (-4 to 482F /-20 to 250 C)
  • (1) Windows compatible software
  • (1) RS-232 cable
  • (1) 9V battery
  • (1) Protective holster
Image Part # Product Description Price Stock Order
Extech 421509 Thermocouple Datalogger 421509 7 thermocouple dual input datalogger with alarm
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Extech 421509 Thermocouple Datalogger 421509-NIST 7 Thermocouple dual Input datalogger with alarm, NIST traceable
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Extech 153117 117V AC Adapter 153117 117V AC adapter
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