BCcomponents DATA SHEET 2322 691 90001 Humidity sensor Product specification 2001 Jan 18 Supersedes data of May 17th 1999 File under BCcomponents, BC02 BCcomponents Product specification Humidity sensor 2322 691 90001 APPLICATIONS QUICK REFERENCE DATA • Humidity measurements in PARAMETER VALUE UNIT electronic hygrometers for domestic Humidity range (RH) 10 to 90 % use Capacitance at +25 °C; 43% RH; 100 kHz 122 ±15% pF • Self-regulating air humidifiers, etc. Sensitivity between 12 and 75% RH 0.4 ±0.05 pF/%RH Frequency 1to1000kHz DESCRIPTION Maximum AC or DC voltage 15 V This capacitive atmospheric humidity Storage humidity range (RH) 0 to 100 % sensor consists of a non-conductive Ambient temperature range: foil, which is covered on both sides with a layer of gold. The dielectric operating 0 to +85 °C constant of the foil changes as a storage −25 to +85 °C function of the relative humidity of the Drop test: ambient atmosphere and, accordingly, height of free fall 1 m the capacitance value of the sensor is a measure for relative humidity. The foil Mass ≈1.3 g 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. 2001 Jan 18 2 BCcomponents Product specification Humidity sensor 2322 691 90001 MECHANICAL DATA 15.5 0.5 Mounting The device can be soldered directly on to a printed-circuit board or fastened with 3 mm bolts. 23.0 Soldering 0.5 Solderability: ≤240 °C; ≤4s. Resistance to heat: ≤240 °C; ≤4s. 3 Robustness of terminations 1.15 max Tensile strength: 10 N. 5.08 3.1 0.1 17.0 11.5 5.0 0.5 0.5 0.5 MBD125 Dimensions in mm. Fig.1 Component outline. 2001 Jan 18 3 BCcomponents Product specification 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 Tan δ 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 MEA832 150 C (pF) 140 130 120 110 0 50 100 RH (%) Fig.2 Typical capacitance as a function of relative humidity. 2001 Jan 18 4