HCT01 - 4 Pages

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Catalogue excerpts

Humidity / Temperature Sensor HCT01 humidity/temperature sensors combine high quality, long time approved thin-film sensor technology simple processability and the possibility of a costefficient integration into customer application. The pre-adjusted capacitive E+E humidity sensorelement saves complicated and time-consuming humidity adjustment. Highly accurate thin-film elements are used for the temperature measurement – a must for precise dew point determination. The DFN packaging guarantees maximum mechanical sensor protection and enables reflow soldering. A protective film on the surface of the humidity sensor ensures extensive protection against contamination like dust, salt or chemical deposit. Depending on the individual application, accuracy requirements and existing interface electronics, different cost-saving evaluation circuitries are available. Do not hesitate to contact our specialists for further information and design-in support. Features RH and T sensor in one package RH adjusted mature humidity sensor technology high temperature accuracy reflow solderable integrated dust filter standardized DFN package Basic Design Front Capacitive E+E Humidity Sensor (with coating => protection against pollution) Temperature Sensor Pt1000 DIN B or Mo1k Solder Pads Mo1k v1.6 / Modification rights reserved

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Technical Data Humidity Element Working range Nominal capacitance Long term stability Maximum supply voltag Maximum DC^voltage Parallel Resistance Serial Resistance Respons time Material housing Lead finish Sensor protection Storage temperature plated Cu lead-frame and green epoxy-based compound fully RoHS^nd WEEE compliant Respons time Maximum continuous current(tLL<tA<tUL) Maximum current Self heating 1) Detailed calculation on request. 2) In environments with high concentrations of volatile organic compounds, the value may be higher. Working Range The working range is shown with regard to the humidity...

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The average increase of capacitance over the working range is app. 25 pF. For the range of 0–98% RH linear approximation is possible, errors will be lower than < ± 1.5% RH. The sensor characteristic is determined by the following linear formula: Characteristic Humidity Element For high accuracy requirements, the sensitivity is determined by the following polynomial: C(Uw) = C0 * [1 + HC0 * Uw + k(Uw)] whereby: k(Uw) = A1*Uw+A2*Uw1.5+A3*Uw2+A4*Uw2.5 A1 = 2.6657E-3 A2 = -9.6134E-4 -4 A3 = 1.1272E A4 = -4.3E-6 Connection Diagram Top View: Dimensions in mm DFN-8 package Bottom View: v1.6 / Modification...

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Possible circuitries using HCT01 Depending on accuracy requirements and existing electronics, various cost-effective evaluation circuits are available – our specialists can provide expert advice for your specific application. Ordering Guide TYPE TEMPERATURE ELEMENT no temperature element (no code) Pt1000 DINB (D) Mo1k (S) 1000 sensors per reel (TR1) 2500 sensors per reel (TR2,5) Order Example HCT01-02STR1 Type: HCT01 Accuracy RH: ±2% Temp. Element: Mo1k Packaging: 1000 sensors per reel v1.6 / Modification rights reserved

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