[. . . ] www. vaisala. com HMT330MIK Meteorological Installation Kit 100 95 90 warmed probe 85 80 75 1 2 3 4 5 6 7 regular probe After a period of 100 % relative humidity, the warmed probe measures the true humidity, whereas the non-warmed probe takes time to recover from the condensation. and the transmitter calculates the relative humidity from the dewpoint and temperature values. The HMT337 and PTU307 feature warmed probe technology. [. . . ] When warmed, the relative humidity inside the probe stays below the ambient level. With an accurate temperature measurement, the ambient dewpoint can be calculated precisely. To obtain the ambient relative humidity, an additional probe measures the ambient temperature, Essential for critical weather measurements Obtaining a true humidity reading is particularly important e. g. It is essential, for example, in fog and frost prediction. HMT337/PTU307 Features For calibration, a portable HMP77 reference probe is easy to attach beside the HMT337 or PTU307 probe. Technical data Dimensions Dimensions in mm (inches) 13 Ø220 (8. 7) Ø105 (4. 1) 299 (11. 8) 211 (8. 3) Ø100 (3. 9) 40 (1. 6) 371 (14. 6) 645 (25. 4) 800 (31. 5) 800 (31. 5) Order form Purchaser Valid from November 2006 d Order no. Vaisala Meteorological Installation Kit for HMT330 transmitters Order form d Vaisala Meteorological Installation Kit Support bar & shield for warmed Td probe Support bar and radiation shield for additional T probe or for non-warmed RH or Td probe Support bar mounting plate Transmitter mounting plate Static Pressure Head HUMICAP® is a registered trademark of Vaisala. HMT330MIK PRICE No support bar & shield for warmed Td probe 0 Support bar & shield for warmed Td probe 1 No support bar or radiation shield A Support bar with DTR502 shield for T probe B Support bar with DTR13 shield for T probe C Support bar with DTR502 shield for non-warmed RH or Td probe D Support bar with DTR13 shield for non-warmed RH or Td probe E No mounting plate 0 Pole mounting plate for support bar/bars 1 No transmitter mounting plate A Transmitter mounting plate for support bar assembly B Transmitter mounting plate for pole assembly C No Static Pressure Head 0 Static Pressure Head SPH10 1 TOTAL QTY TOTAL VALUE Selections in bold are included in the prices of the basic versions. Selections in italic have anmore information, visit For additional cost Ref. B210944EN-B ©Vaisala 2010 www. vaisala. com or contact Example us at sales@vaisala. com of order code with typical settings: HMT330MIK This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners. [. . . ] All specifications -- technical included -- are subject to change without notice. End customer: 160 (6. 3) [. . . ]