Thermosensitive materials can generally be classified into three categories: semiconductor type, metal type, and alloy type. The details are as follows:
Semiconductor hair dryer OEM compliance solutions materials
This type of materials includes single-crystal semiconductors, polycrystalline semiconductors, glass semiconductors, organic semiconductors, and metal oxides, etc. They all have very large resistance temperature coefficients and high resistivity. The sensors made from them also have quite high sensitivity. According to the resistance temperature coefficient, they can be divided into negative resistance temperature coefficient materials and positive resistance temperature coefficient materials. Within a limited temperature range, the negative resistance temperature coefficient materials can reach -6*10-2/℃, and the positive resistance temperature coefficient materials can be as high as -60*10-2/℃ or above. For example, barium sulfate ceramics is an ideal positive resistance temperature coefficient semiconductor material. These two types of materials are widely used in temperature measurement, temperature control, temperature compensation, switching circuits, overload protection, and time delay, etc. For instance, they can be used to make hair dryer OEM compliance solutions thermometers, hair dryer OEM compliance solutions switches, hair dryer OEM compliance solutions thermometers and hair dryer OEM compliance solutions delay relays, etc.
This type of material has an exponential relationship between its resistance and flow rate, which results in a narrow temperature measurement range and poor uniformity.
Metal hair dryer OEM compliance solutions materials
Such materials are widely used in temperature measurement by thermal resistors, current limiters, and automatic constant-temperature heating elements. Examples include platinum resistance thermometers, nickel resistance thermometers, and copper resistance thermometers. Among them, platinum-based temperature sensors exhibit remarkable high precision and stability in various media (including corrosive media). However, due to the scarcity and high cost of platinum, their wide application is somewhat limited. Copper temperature sensors are cheaper, but when used in corrosive media for a long time, they can cause significant changes in static characteristics and resistance values. According to some reports, copper temperature sensors can be used in the temperature range of -60 to 180℃ in an air medium. However, in foreign countries, nickel temperature sensors are widely and extensively used for long-term temperature measurement in the range of -60 to 180℃ and short-term measurement at 250℃. They consider nickel to be a more ideal material because it has high sensitivity, satisfactory reproducibility, and stability.
OEM compliance solutions for alloy hair dryers materials
Alloy hair dryer OEM compliance solutions are also known as hair dryer OEM compliance solutions alloy. This alloy has a high resistivity and its resistance value is highly sensitive to temperature changes. It is an excellent material for manufacturing temperature-sensitive sensors. The performance requirements for hair dryer OEM compliance solutions alloy as a temperature-sensitive sensor are as follows:
(1) Sufficiently high resistivity;
(2) A relatively high coefficient of resistance temperature variation;
(3) Having a coefficient of linear expansion very close to that of the experimental material;
(4) Small strain sensitivity coefficient;
(5) During heating and cooling within the working temperature range, the resistance temperature curve should exhibit good repeatability.
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