Extech TM300 Type K/J Dual Input Thermometer

Extech TM300 Type K/J Dual Input Thermometer


The Extech Type K/J Dual Input Thermometer uses side button controls for easy one-handed measurements of high temperatures.


  • Wide temperature range with 0.1°/1° resolution
  • Data Hold function freezes reading on display
  • Max/Min/Avg readings with relative time stamp
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The Extech Type K/J Dual Input Thermometer calculates differential temperature readings while side buttons allow for convenient one-hand operation. The thermometer has a wide temperature range with readout in °F, °C, or K (Kelvin). The offset key is used for zero function to make relative measurements. The large backlit LCD displays T1, T2, T1-T2differential, plus min, max, and Average readings. The data hold function freezes the readings on the display for further analysis. 

The optional type K bead wire temperature probe measures from -58 to 1000°F (-50 to 538°C) with subminiature connector. It includes a banana adaptor connector for use with meters with banana adaptor inputs. The optional type K pipe clamp temperature probe is for hands-free superheat/sub-cooling temperature measurement from -4°F to 200°F(-20°C to 93°C) for TP200 and -4 to 450°F (-20 to 232°C).

Notable Specifications:
  • Temperature (type K) range: -328 to 2501°F (-200 to 1372°C)
  • Temperature (type J) range: -346 to 2012°F (-210 to 1100°C)
  • Basic accuracy: ±(0.15% rdg + 1.8°F/1°C)
  • Resolution: 0.1°/1°Dimensions: 8.7 x 2.5 x 1.1" (220 x 63 x 28mm)
  • Weight: 7oz (200g)
What's Included:
  • (1) Thermometer
  • (2) Type K bead wire temperature probes
  • (3) AAA batteries
  • (1) Pouch case
Image Part # Product Description Price Stock Order
Extech TM300 Type K/J Dual Input Thermometer TM300 Type K/J dual input thermometer
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Extech TM300 Type K/J Dual Input Thermometer TM300-NIST Type K/J dual input thermometer, NIST traceable
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Image Part # Product Description Price Stock Order
Extech TP870 Bead Wire Type K Temperature Probe TP870 Bead wire Type K temperature probe with mini connector
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Extech TP875 High Temperature Bead Wire Type K Probe TP875 High temperature bead wire type K temperature probe
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Extech TP200 Type K Clamp Temperature Probe TP200 Type K pipe clamp temperature probe
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Extech TP400 High Temperature Type K Pipe Clamp TP400 High temperature Type K pipe clamp with 36" cable
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