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Testo 6740 Dewpoint Transmitter


The testo 6740 was especilally developed for trace humidity measurement in compressed or dry air (e. g. granulate dryers). Thanks to a special adjustment, optimum accuracy in the trace humidity range has been achieved. The result of the development of the testo 6740 is a measuring range of -45 °Ctd to +30 °Ctd and excellent accuracy.

For the display of the relevant trace humidity parameters, a freely scalable analog output is available, optionally with a switch contact plug for MAX monitoring. In addition to this, the testo 6740 stands out thanks to its compact and userfriendly design, such as the rotatability of the housing by 350° for the optimum positioning of the display.

  Measurement of dewpoints in the range from -45 °Ctd to +30 °Ctd
  Testo polymer humidity sensor with high accuracy and longterm stability
  Convenient operation via the display menu
  Analog output 4 to 20 mA (2-wire) and optional alarm plug with 2 integrated switch outputs
  Compact design with rotatable housing by 350° for optimum positioning of display
  Display with operating menu (optional)
  Trace humidity adjustment without reference measuring instrument possible on site with accessory (2-point adjustment device)



Data Sheet

Ordering Information

0555 6741 - Testo 6741, G½ thread, without display
0555 6742 - Testo 6742, NPT½ thread, without display
0555 6743 - Testo 6743, G½ thread, with display
0555 6744 - Testo 6744, NPT½” thread, with display

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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