Thermok: 4 Channel Thermocouple Display

Thermocouple display with LCD and PC interface...

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As of 2008-02-01 the Thermok has been discontinued. These pages are left in place for informational purposes only. Suitable replacement options are the ThermokSolar and ThermokLogger.
Front profile photo of Thermok

This is the front of the Thermok. The red button is for showing the maximum and minimum temperatures for each of the four thermocouple channels.
Back profile photo of Thermok

The white flat connectors are miniature K-type thermocouple connectors. There is a power jack for a 7-20 volt DC input, and a real RS-232 level serial port for connecting the Thermok to a computer or PDA.


The Thermok is a four channel thermocouple display with computer interface. Using K-type thermocouple (not included) it can measures temperatures between 32°F and 1875°F.

Thermok firmware can be updated simply by downloading the latest image and then running update software on your computer. New firmware is made available whenever bugs are found or new features are added.


  • engine exhaust gas temperature measurement
  • process monitoring
  • temperature data logging with PC
  • motor sports
  • shifter carts


All specifications are preliminary and are subject to changed without notice.
Thermocouple Input Channels 4
Thermocouple Type K-type (Chromel (+) Alumel (-))
Thermocouple Connectors 4 miniature size
Temperature Range 32°F to 1875°F (0°C to 1024°C)
Display Resolution
Measurement Accuracy 8°F (4°C)
Dimensions 4" (101.6 mm) long, 5.50" (139.7 mm) wide, 1.45" (36.83 mm) tall
Weight 6.7 ounces (190 grams)
Weight, battery version 9.9 ounces (280 grams) including 6xAAA batteries
Input Voltage 7-20 volts DC
Power Connectors 2.1mm x 5.5mm center positive.
DB9-Female. Pin 5 ground, Pin 9 positive.
Input Current 30mA at 13.8 volts DC
Display Type LCD, 16 characters by 2 lines. Positive Transflective LED Edge Backlit.
Serial Physical Interface RS-232A levels. DB9-Female. DCE. Compatible with all serial ports.
Serial Data Stream 9600 8N1. ASCII protocol.
Case Material Flame retardant ABS plastic. UL's best flame rating of 94-5VA (case only).
This device is sold as "Test Equipment" for industrial and commercial applications. It is intended to be used for maintenance, research, evaluation, simulation and other analytical or scientific applications.

Buy it now!

Assembled and tested Thermok. $140.

Assembled and tested Thermok. Ready to rock and roll!

AC Adapter. $7.

9 VDC @ 300mA AC adapter for use in North America.

Serial Cable. $4.50.

DB9 Male to DB9 Female cable, 6'. Connects the Thermok to a standard PC serial port. Also will work with USB to serial port adapters.

Miniature K type male thermocouple connector. $2.25.

  • This is Omega Part number NMP-K-M.
  • Type NMP Glass-Filled Nylon
  • 220°C (425°F) Service Temperatu
  • Glass-Filled Nylon
  • Heavy Duty Construction
  • Accepts Stranded or Solid Wire up to Size 20 AWG
  • Silicone Wire Grommet
  • Combination Phillips/Slot Screws

International shipping. $7.

Thermok and accessories include domestic postage. Shipping to addresses outside of the United States is an additional $7.

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In order to improve design and supply the best product possible, specifications may change without notice.