Thermal Head

Thermal Head

 

(or temperature head), the difference in the characteristic temperatures of a medium and a wall (or phase boundary) or of two media, between which heat transfer is occurring. The local thermal head is the difference between the temperature of the medium and the local temperature of the wall (or phase boundary) or the temperature difference between two media in a given cross section of a heat-exchange system. The mean thermal head is the difference averaged over a heat-transfer surface. The product of the thermal head and the heat transfer coefficient represents the heat flux, that is, the amount of heat transferred from one medium to the other across a heating surface of unit area in a unit time.

References in periodicals archive ?
thermal head rohm kd2004-dc91c bizerbe article 65620170701 or analogue (see attached file no.
A replacement thermal head covering for a quid was a bargain.
To avoid abnormal failures caused by load abnormal conditions, design your supply with overload and current protection in conjunction and select devices with enough thermal head room to survive the load stress until the control circuit can respond.
Utilizing high-resolution 320 dpi thermal head technology, FilmStation images are excellent in quality, with 4,096 shades of gray contributing to the accuracy of every diagnosis and a maximum density (D-Max) rating of greater than 3.2 that produces an optimal contrast ratio and exceptional black levels.
The ladles are designed with a flexliner to ensure reduced time and energy requirements to obtain molten temperature in the holding furnaces and reduce thermal head temperatures.
It incorporates a 325 dpi thermal head, a resolution of 1,280 by 500 pixels and a 256-level grayscale for sharp reproduction of the most intricate details.
The B-SV4D is equipped with a thermal head with at least a 25 km life.
It prints on cylindrical and flat objects using a heat-transfer foil with an on-demand, dotmatrix-type thermal head and Windows-based print software.
DUT fixturing, mounted to the thermal head on the face of the QubePak, provides thermal and electrical connection for virtually any device package, including bare die, MCM, PCA, MMIC and substrate.
The P-9 lDW's high-density, 260-dpi thermal head and thermal recording allow reproduction of intricate details with high-resolution printing of 1024 x 786 pixels and 256 gray-scale levels in normal-size printing mode.
This feature, built with Adobe GoLive software (at a price of $400), explains what a Model ML 28 printer will do, and what the engineering specifications are for that printer, including thermal head, label depth, print width options and print speed.
Distinguishing the SpectaPix printer from other digital printers in its class are a host of innovative features, including a newly designed thermal head, low cost A4 and A4+ series self-laminating media, and Sony's picture quality controller technology -- all contributing to its ability to produce color accurate prints, time after time.