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| 2322 691 90001 Vishay BCcomponents Humidity Sensor 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. QUICK REFERENCE DATA PARAMETER VALUE UNIT % PF PF/%R kHz %RH/K Humidity range (RH) 10 to 90 Capacitance at +25 C; 43% RH; 100 kHz 122 15% Tan at +25 C; 100 kHz; 43% RH 0.035 Sensitivity between 12 and 75% RH 0.4 0.05 Frequency 1 to 1000 Temperature dependence 0.1 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 3 10 to 90 to 10%) Maximum AC or DC voltage 15 Storage humidity range (RH) 0 to 100 Ambient temperature range: operating 0 to +85 -25 to +8 storage Drop test: height of free fall 1 Mass 1.3 Note Unless otherwise stated, measurements are in accordance with "IEC publication 60539". Stability is in accordance with "CECC 43000" and "IEC 60068-2". MOUNTING % V % C C M G 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 150 C (pF) 140 MEA832 DIMENSIONS in millimeters 15.5 0.5 23.0 0.5 130 3 1.15 max 5.08 120 3.1 0.1 110 0 50 RH (%) 100 17.0 11.5 0.5 0.5 Typical capacitance as a function of relative humidity. 5.0 0.5 MBD125 Component outline. For technical questions contact: nlr.europe@vishay.com Document Number: 29001 Revision: 10-Oct-03 www.vishay.com 66 This datasheet has been downloaded from: www..com Datasheets for electronic components. |
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