1999 may 17 330 bc components product speci?cation humidity sensor 2322 691 90001 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 humidity range (rh) 10 to 90 % capacitance at +25 c; 43% rh; 100 khz 122 15% pf sensitivity between 12 and 75% rh 0.4 0.05 pf/%rh frequency 1 to 1000 khz 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 drop test: height of free fall 1 m mass ? 1.3 g
1999 may 17 331 bc components product speci?cation humidity sensor 2322 691 90001 mechanical data marking philips h1. mounting the device can be soldered directly on to a printed-circuit board or fastened with 3 mm bolts. soldering solderability: 240 c; 4s. resistance to heat: 240 c; 4s. robustness of terminations tensile strength: 10 n. fig.1 component outline. dimensions in mm. mbd125 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
1999 may 17 332 bc components product speci?cation humidity sensor 2322 691 90001 electrical characteristics unless otherwise stated, measurements are in accordance with iec publication 60539 . stability is in accordance with cecc 43000 and iec 60068-2 . parameter value unit humidity range (rh) 10 to 90 % capacitance at +25 c; 43% rh; 100 khz 122 15% pf ta n d at +25 c; 100 khz; 43% rh 0.035 sensitivity between 12 and 75% rh 0.4 0.05 pf/%rh frequency range 1 to 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 mass ? 1.3 g fig.2 typical capacitance as a function of relative humidity. 0 100 150 110 mea832 120 130 140 50 c (pf) rh (%)
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