www.vishay.com For technical questions, contact: [email protected] Document Number: 29001 62 Revision: 24-Jun-09 2381 691 90001/HUMIDITY-SENS-E Vishay BCcomponents Humidity Sensor Note Unless otherwise stated, measurements are in accordance with “IEC publication 60539” Component is 100 % lead (Pb)-free Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC Stability is in accordance with “CECC 43000” and “IEC 60068-2” DIMENSIONS in millimeters APPLICATIONS • Humidity measurements in electronic hygrometers for domestic use • Self-regulating air humidifiers, etc. DESCRIPTION This capacitive atmospheric humidity sensor consists of a non-conductive foil, which is covered on both sides with a layer of gold. The dielectric constant of the foil changes as a function of the relative humidity of the ambient atmosphere and, accordingly, the capacitance value of the sensor is a measure for relative humidity. The foil is clamped between contact springs and assembled in a plastic housing. It is provided with two connecting pins which fit printed-circuit boards with a grid pitch of 2.54 mm, provision is also made for fastening with 3 mm bolts. The characteristics are not affected by incidental water condensation on the sensor foil. It should not be exposed to either acetone or chlorine vapours. MOUNTING The device can be soldered directly on to a printed-circuit board or fastened with 3 mm bolts. SOLDERING Solderability: 240 °C; 4 s Resistance to heat: 240 °C; 4 s ROBUSTNESS OF TERMINATIONS Tensile strength: 10 N ELECTRICAL CHARACTERISTICS QUICK REFERENCE DATA PARAMETER VALUE UNIT Humidity range (RH) 10 to 90 % Capacitance at + 25 °C; 43 % RH; 100 kHz 122 ± 15 % pF Tan ä at + 25 °C; 100 kHz; 43 % RH 0.035 Sensitivity between 12 % and 75 % RH 0.4 ± 0.05 pF/%RH Frequency 1to 1000 kHz Temperature dependence + 0.1 %RH/K Response time in minutes (to 90 % of indicated RH change at + 25 °C, in circulating air): Between 10 % and 43 % RH < 3 Between 43 % and 90 % RH < 5 Hysteresis (for RH excursion of 10 % to 90 % to 10 %) 3 % Maximum AC or DC voltage 15 V Storage humidity range (RH) 0 to 100 % Ambient temperature range: Operating 0 to + 85 °C Storage - 25 to + 85 °C Weight 1.3 g 5.0 ± 0.5 3.1 ± 0.1 11.5 ± 0.5 17.0 ± 0.5 5.08 1.15 max 3 23.0 ± 0.5 15.5 ± 0.5 2.9 ± 0.2 3° Component outline 0 100 150 110 MEA832 120 130 140 50 C (pF) RH (%) Typical capacitance as a function of relative humidity

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